Attachment Narrative

This document pretains to SES-STA-20120208-00156 for Special Temporal Authority on a Satellite Earth Station filing.

IBFS_SESSTA2012020800156_938760

                   FEDERAL COMMUNICATIONS COMMISSION
                            Washington, DC 20554

In the Matter of                               )
                                               )
Raysat Antenna Systems, LLC                    )     File No.
                                               )
Authority to Operate Up to 10 Technically      )
Identical Vehicle Mounted Earth Stations in    )     Call Sign: E060101
the 14.0-14.5 GHz and 11.7-12.2 GHz            )
Frequency Bands                                )
                                               )

            REQUEST FOR SPECIAL TEMPORARY AUTHORIZATION


       Raysat Antenna Systems, LLC (“RAS”), pursuant to Section 25.120(b)(4) of the

Commission’s rules, 47 C.F.R. § 25.120(b)(3), hereby seeks a 30-day special temporary

authority (“STA”) to operate its “E-7000” land mobile-satellite service (“LMSS”) earth

station antennas on a commercial basis. Such operations would be consistent with RAS’s

existing LMSS blanket license authority, which will soon be the subject of modification

applications to confirm full conformance to the Commission’s vehicle-mounted earth station

(“VMES”) rules. Grant of such authority will also facilitate the limited introduction of this

new, low-cost mobile broadband solution to commercial and government customers alike.

I.     INTRODUCTION

       The Commission recently authorized RAS to operate a total of 10 units of the E-7000

LMSS antenna for experimental testing and demonstration purposes.1 This testing has been

successful and recent inquires by potential clients in the commercial and government sectors

have prompted RAS to file the instant request. RAS seeks an STA to operate up to ten (10)




1
 Experimental Special Temporary Authorization, File No. 0583-EX-ST-2011, Call Sign
WF9XEG, (Oct. 5, 2011).


E-7000 to extend the E-7000’s capabilities to the commercial sector during the pendency of

formal VMES applications that will soon be filed with the Commission.2

       Grant of the commercial STA would strongly serve the public interest by supporting

limited commercial and government use of the E-7000 in real-world conditions and enabling

RAS to respond quickly to market demand for this cutting-edge mobile satellite

communications solution. An STA authorizing short-term commercial operation of the E-

7000 will result in expanded equipment options for U.S. Government and commercial users,

and will promote continued U.S. leadership in satellite communications technology and

enhanced competition in an important sector of the mobile broadband telecommunications

market in the United States.

II.    THE E-7000 ANTENNA

       The E-7000 antenna is a single panel Ku-band array antenna developed in response to

customer requests for higher transmit and receive performance. As with all RAS antennas,

the E-7000 antenna uses a full motion tracking system that allows the user to have broadband

data access while on the move. The antenna is designed for military and commercial users

and will provide mobile access to the many information-rich applications these users require.

       The E-7000 antenna technology builds upon RAS’s proven antenna technology for

mobile applications. 3 The major enhancement is in the antenna panel.           The element



2
  Consistent with the Commission’s determination in its existing blanket license authority,
RAS has filed three separate STA requests to reflect the potential use of the E-7000 with
three separate hub earth stations. However, RAS seeks authority to operate no more than ten
(10) terminals across all three networks.
3
  RAS current holds six LMSS earth station authorization that will soon be the subject of
modification applications to add the E-7000 and other terminals, as well as to establish full
conformance with the Commission’s VMES rules. See Raysat Antenna Systems Application
for Authority to Operate 400 Land Mobile Satellite Service (“LMSS”) Earth Stations in the
14.0-14.5 GHz and 11.7-12.2 GHz Frequency Bands, IBFS File Nos. SES-LIC-20060629-
01083; SES-LIC-20060629-02248; SES-LIC-20060629-02249; SES-LIC-20060629-02250;
SES-LIC-20060629-02251; SES-LIC-20060629-02252; SES-AMD-20070620-00839; Call
                                             ‐2‐


technology has been changed from a printed circuit design to a waveguide design, which

results in higher performance. The panel is capable of both transmit (at 14.0-14.5 GHz) and

receive (at 11.7-12.2 GHz) operation. The antenna allows tracking in three axes: azimuth,

elevation and polarization.

       The E-7000 antenna consists of a single 44 inch-by-8.3 inch panel array that is

mounted on a rotatable platform, which rotates in azimuth to orient the panel towards the

satellite. The panel array tilts to set the panel’s elevation angle. In addition, the E-7000

antenna has a polarization control mechanism that sets the correct polarization angle for both

transmit and receive.


        A.     Antenna Operation and Pointing Control

       As with all RAS antennas, the E-7000 antenna maintains active control of the azimuth,

elevation and polarization angles. The antenna scans mechanically in both azimuth and

elevation. For satellite acquisition, the E-7000 antenna uses a built-in GPS receiver to

determine its position on the earth. It uses the geographical position and the longitudinal

position of the satellite to determine the appropriate elevation angle. Once the elevation angle

is set, the antenna rotates in azimuth.

       During the scanning process, the antenna monitors the received power level within a

specified frequency band with the RSSI. When a power threshold is reached, the scanning is

stopped and the antenna tracks on the signal. The ACU then queries the modem to see if

there is a valid Eb/No. If there is a valid Eb/No verifying that the target satellite has been

acquired, the antenna will continue to track on the signal. Conversely, if there is not a valid

Eb/No, the antenna will resume scanning.




Signs: E060101; E060447; E060448; E060449; E060450; E060451; Order and
Authorization, DA 08-401 (IB OET rel. Feb 15, 2008).

                                              ‐3‐


       Once the satellite is acquired, the antenna dithers mechanically in both azimuth and

elevation to maintain peaking on the signal and maintain accurate pointing to the satellite.

The maximum scan angles are ±0.3° in azimuth and 0.9° in elevation. The antenna also uses

internal 3-axis gyroscopes and 2-axis inclinometers to help with tracking while the antenna is

in motion. The antenna will also use the information from the gyros to determine when the

maximum pointing offset of 0.5º has been reached and will cease transmissions within 100

milliseconds when this occurs.4 The E-7000 will not resume transmissions until pointing

accuracy is within 0.35°.5

       A simplified block diagram of the major components in the tracking and acquisition

system is shown below in Figure 1.

                                     Antenna
                Inclinometer                   3-Axis
                                                Gyro



                                 Antenna
                                                        Elevation
                                  Panel
                  Polarization




                                                  GPS               BUC
                                  Azimuth




                                                                               Tx         Rx


                        Antenna
                                                                               Modem
                        Controller




                                                                          Customer Equipment




                                                         Figure 1
                                            Typical Antenna Equipment Set-up




4
  See 47 CFR § 25.226(b)(1)(iv)(B). Although the antenna dithers in azimuth by ±0.3º and
RAS expects pointing accuracy to typically remain at that value, RAS is implementing a
declared pointing accuracy of 0.5° – the offset at which antenna transmissions automatically
terminate – to set maximum transmit power levels. See id. at §§ 25.226(a)(1)(ii)(B), (b)(1).
5
 Id. Although the VMES rules permit the resumption of transmissions at the declared
maximum pointing error (i.e., 0.5º), RAS will not resume transmissions until the pointing
accuracy is within 0.35º.

                                                                     ‐4‐


The following individual is the RAS point-of-contact with the ability and authority to cease

all emissions from the terminals:

        Kevin Bruestle
        703-462-5004
        1750 Old Meadow Road
        McLean, VA 22180
        Email: Kevin@sigs-raysat.com

        B.      Points of Communication and Hub

       Under its current experimental STA, RAS operates the E-7000 antenna on the Galaxy

16 satellite located at 99˚ W.L.6 To facilitate flexibility and serve the needs of its government

and commercial customers, RAS also proposes to operate the E-7000 with two additional

satellite points of contact: AMC-5 at 80.9˚ W.L and SES-1 at 101˚ W.L. Table 1 below lists

the skew angles for various locations in CONUS to these satellites.

       Table 1: Skew Angles (Various Locations in CONUS) to Galaxy 16 and SES 1

    Site Name           Site Lat    Site Long Galaxy 16    SES 1      AMC 5
                       (deg. N)     (deg. W) Skew Angle Skew Angle Skew Angle
    Seattle, WA        47.5         122.3     -19.2˚    -18.4˚     -31.2˚
    San Diego, CA      32.4         117.2     -26.2˚    -23.7˚     -43.0˚
    Bangor, ME         44.8         68.8       26.9˚     28.2˚      11.9˚
    Miami, FL          25.8         80.2       33.7˚     36.3˚      1.5˚


       The maximum skew angle associated with operation in CONUS with the Galaxy 16

and SES-1 satellites is 36.3˚, and with the AMC-5 satellites is 43˚. As a conservative

measure, RAS will incorporate skew angle restrictions of 37.5˚ and 50˚ to limit the

maximum transmit power to each of these satellites to ensure that the terminals comply with

the VMES off-axis EIRP mask (i.e., two-degree spacing requirements) at all possible transmit

locations.




6
 A coordination letter is being sought from Intelsat, which operates the Galaxy 16 satellite,
and will be submitted as an attachment to the instant application as soon as it is available.

                                               ‐5‐


       The gateway through which operations of the E-7000 will be control is the Spacenet

gateway earth station in McLean, Virginia (Call Sign E860326).

       C.                   Antenna Patterns and Transmit Power Levels

       The transmit gain pattern shown below in Figure 2 exceeds the Commission’s routine

licensing guidelines (37.5˚ skew shown), but by limiting the input power spectral density

(“PSD”) to -18.1 dBW/4kHz for the Galaxy 18 and SES-1 satellites and -20.15 dBW/4kHz

for the AMC-5 satellite, the off axis EIRP density remains under the off-axis PSD mask even

with maximum skew and a 0.5° degree pointing error in the GSO plane, as further shown

below in Figures 3 and 4. The impact of skew is also confirmed in Figure 5, where 0° skew is

shown for the -20.15 dBW/4kHz power level.

                                                  14.25GHz H‐Pol, Nominal Co‐Pol Gain


                      35.000




                      25.000




                      15.000
         Gain (dBi)




                                                                                                        37.5 Skew
                                                                                                        FCC

                       5.000




                       ‐5.000




                      ‐15.000
                                ‐10   ‐8     ‐6     ‐4     ‐2           0          2   4   6   8   10

                                                            Off Axis Angle (Degrees)




                                                          Figure 2
                                           Close-In Gain Pattern 37.5˚ Skew Angle




                                                                  ‐6‐


                                                           Figure 3 - 37.5 Degree Skew Angle Off-Axis PSD Pattern


                                                           14.25GHz H‐Pol, Nominal Transmitted Co‐Pol PSD with ‐20.15dBW/4KHz at Input
                                               20




                                                                                                                              15 ‐ 25Log(theta)
                                               10
Transmitted Off‐Axis EIRP Density (dBW/4kHz)




                                                0




                                                                                                                                                       FCC
                                               ‐10
                                                                                                                                                       50 Skew
                                                                                                                                                       +0.5 deg
                                                                                                                                                       ‐0.5 deg
                                               ‐20




                                               ‐30




                                               ‐40
                                                     ‐10       ‐8     ‐6      ‐4      ‐2              0               2   4     6           8     10

                                                                                           Off‐Axis Angle (Degrees)




                                                           Figure 4 - 50 Degree Skew Angle Off-Axis PSD Pattern




                                                                                               ‐7‐


                                                                    14.25GHz H‐Pol, Nominal Transmitted Co‐Pol PSD with ‐20.15dBW/4KHz at Input
                                                        20




                                                                                                                                      15 ‐ 25Log(theta)
                                                        10
         Transmitted Off‐Axis EIRP Density (dBW/4kHz)




                                                         0




                                                                                                                                                               FCC
                                                        ‐10
                                                                                                                                                               0 Skew
                                                                                                                                                               +0.5 deg
                                                                                                                                                               ‐0.5 deg
                                                        ‐20




                                                        ‐30




                                                        ‐40
                                                              ‐10       ‐8     ‐6      ‐4     ‐2              0               2   4     6           8     10

                                                                                                   Off‐Axis Angle (Degrees)




                                                                     Figure 4 - 0 Degree Skew Angle Off-Axis PSD Pattern


       The foregoing figures confirm that at all times transmissions from the E-7000 antenna

are fully compliant with the Commission’s two-degree spacing levels with each proposed

satellite point of communications.

       The maximum level of off-pointing is set to 0.5° in the plane of the GSO arc after

which the transmissions are commanded to turn off. In addition, reduced input PSD into the

antenna ensures compliance with off-axis EIRP levels associated with two-degree spacing

and the coordinated parameters of the serving satellite. Relevant transmission parameters are

set forth below.




                                                                                                       ‐8‐


       SATELLITE         EIRP          EMISSION    ERP                  INPUT POWER
                                       DESIGNATORS                      AT FLANGE
       Galaxy 16         46.65dBW      7M75G7W,            48.8dBW      -18.1 dBW/4kHz
       and SES-1         (46,238W)     9M45G7W             (75,858W)
       AMC-5             44.75dBW      7M75G7W,            46.9dBW      -20.15 dBW/4kHz
                         (29,854W)     9M45G7W             (48,978W)


       Link budgets for the E-7000 antenna are included as Attachment A. A Radiation

Hazard Analysis is also included as Attachment B. Finally, RAS’s experimental STA, which

includes condition that RAS fully acknowledges and accepts, is included as Attachment C.

III.   Grant of Special Temporary Authority Will Serve the Public Interest

       RAS is seeking an STA to permit commercial operations of its E-7000 antenna during

the pendency of the planned VMES application proceeding. RAS will follow this request

with a companion STA and commercial application filing. This approach will enable RAS to

meet immediate government and commercial market demand for the capabilities provided by

the proven E-7000 design, which has operated without interference since the commencement

of experimental trials last year.

       This, in turn, will enhance competition in the mobile telecommunications market in

the United States. Grant of the requested STA will also ensure that the increase in consumer

demand high-bandwidth satellite communications services will be met with affordable and

reliable VMES systems while strengthening U.S. leadership in these advanced

communications services.




                                            ‐9‐


IV.    CONCLUSION

       In view of the foregoing, and in the absence of any objection or public interest harm

and the significant public benefits associated with the requested relief, RAS respectfully

requests that the Commission grant RAS a 30-day STA to permit commercial operation of the

E-7000 antennas.

                                           Sincerely,

                                           RAYSAT ANTENNA SYSTEMS, LLC

                                           /s/ Carlos M. Nalda
                                           _________________________
                                           Carlos M. Nalda
                                           Squire, Sanders & Dempsey (US) LLP
                                           1200 19th Street, N.W.
                                           Suite 300
                                           Washington, D.C. 20036

                                           February 8, 2012




                                           ‐10‐


ATTACHMENT A
 LINK BUDGET


                                   Galaxy 16 Link Budget - Example 1

                      Data Parameters                                                Satellite Parameters
Data Rate                            5280.9      kbps                Sat Name                       G16
FEC                                   21/44      Turbo               Sat Long.                        99 deg
Modulation                             qpsk      BPSK / QPSK         Sat Rx, G/T                     2.8 dB/K
Threshold Eb/No                         2.80     dB                  Sat Tx, EIRP                   51.3 dBW
Occ BW                                  1.40                         SFD                             -94 dBW/m^2
Spread Spectrum                            n     (Y / N)             IP / OP ratio                     4 dB
Chip Rate                               5.53     Mchips/s            U/L Freq                      14.25 GHz
Total # of spread Links                    1                         D/L Freq.                     11.95 GHz
Beta Factor                             1.00
                     Rx Site Parameters                                              Tx Site Parameters
Rx Site Name                        NY Hub                           Tx Site Name                  Rem
Rx Lat                                  40.5     deg                 Tx Lat                          39 deg
Rx Long                                   74     deg                 Tx Long                         77 deg
Rx G/T                                  37.4     dB/K                Tx Ant Gain                     36 dBi
Ant Gain                                59.2     dBi                 Tx Loss                          1 dB
System Temp                              150     K                   Radome loss                   0.25 dB
                                                                     Pointing Loss                    1 dB
                       Interference Parameters                       Tx HPA                       40.00 W
ASI U/L EIRP in our direction                4.2 dBW/4KHz
DL interferemce, dBW/4KHz                    -20 dBW/4KHz            DownLink Fade                 0.0 dB



Threshold C/N                             2.60 dB
C/Io Uplink WRT Saturation                62.1 dB/Hz
C/Io Downlink WRT Saturation             107.3 dB/Hz

Tx Slant Range                      37937218.3   m                   Rx Slant Range        38159620.9    m
Tx FSL                                   207.1   dB                  Rx FSL                     205.6    dB
Uplink EIRP                               49.8   dBW                 OPBO                        15.5    dB
Uplink C/No                               73.4   dB-HZ               D/L EIRP                    35.8    dBW
U/L C/N                                    5.9   dB                  D/L C/No                    95.7    dB/Hz
G(1m^2) Tx                                44.5   dBi                 D/L C/N                     28.2    dB
U/L flux density @ satellite            -113.5   dBW/m^2
IPBO                                      19.5   dB
                                                                              NOTES & CALCULATIONS
C/I up                                    14.1 dB
C/I dn                                    24.4 dB                    Set CDMA margin to 0 to get correct UL pwr

Clear Sky C/(N + I)                       5.25 dB                    COPBO                           4 dB
CS Eb/No                                  5.46 dB                    Transponder BW                 36 MHz
Clear Sky (CS)Margin                      2.66 dB
                                                                     %PWR                         7.07   %
D/L Faded C/(N+I)                         5.25 dB                    PEB                          2.55   MHz
D/L faded Eb/No                           5.46 dB                    Occupied BW                  7.75   MHz
D/L Faded Margin                          2.66 dB                    Percentage BW               21.51   %

                                                                     Hub Dia/effec.                  9            0.65
PSD @ ant Flange                         -18.1 dBW / 4KHz            Rx Gain / G/T               59.16           37.40
Occupied BW                             7745.3 KHz                   Tx Gain                     60.69
D/L PSD/4KHz                               2.9 dBW/4KHz              Spread Factor                   1

                                     Tx Site        Rx Site
Az Angle                             212.70         215.68     deg
El Angle                              39.39          36.59     deg
Pol Angle                             24.83          26.33     deg


                                   Galaxy 16 Link Budget - Example 2

                      Data Parameters                                                Satellite Parameters
Data Rate                            7000.0      kbps                Sat Name                       G16
FEC                                     1/2      LDPC                Sat Long.                        99 deg
Modulation                             qpsk      BPSK / QPSK         Sat Rx, G/T                     2.8 dB/K
Threshold Eb/No                         1.70     dB                  Sat Tx, EIRP                   51.3 dBW
Occ BW                                  1.35                         SFD                             -94 dBW/m^2
Spread Spectrum                            n     (Y / N)             IP / OP ratio                     4 dB
Chip Rate                               7.00     Mchips/s            U/L Freq                      14.25 GHz
Total # of spread Links                    1                         D/L Freq.                     11.95 GHz
Beta Factor                             1.00
                     Rx Site Parameters                                              Tx Site Parameters
Rx Site Name                        NY Hub                           Tx Site Name                  Rem
Rx Lat                                  40.5     deg                 Tx Lat                          39 deg
Rx Long                                   74     deg                 Tx Long                         77 deg
Rx G/T                                  37.4     dB/K                Tx Ant Gain                     36 dBi
Ant Gain                                59.2     dBi                 Tx Loss                          1 dB
System Temp                              150     K                   Radome loss                   0.25 dB
                                                                     Pointing Loss                    1 dB
                       Interference Parameters                       Tx HPA                       40.00 W
ASI U/L EIRP in our direction                4.2 dBW/4KHz
DL interferemce, dBW/4KHz                    -20 dBW/4KHz            DownLink Fade                 0.0 dB



Threshold C/N                             1.70 dB
C/Io Uplink WRT Saturation                62.1 dB/Hz
C/Io Downlink WRT Saturation             107.3 dB/Hz

Tx Slant Range                      37937218.3   m                   Rx Slant Range        38159620.9    m
Tx FSL                                   207.1   dB                  Rx FSL                     205.6    dB
Uplink EIRP                               49.8   dBW                 OPBO                        15.5    dB
Uplink C/No                               73.4   dB-HZ               D/L EIRP                    35.8    dBW
U/L C/N                                    4.9   dB                  D/L C/No                    95.7    dB/Hz
G(1m^2) Tx                                44.5   dBi                 D/L C/N                     27.2    dB
U/L flux density @ satellite            -113.5   dBW/m^2
IPBO                                      19.5   dB
                                                                              NOTES & CALCULATIONS
C/I up                                    13.1 dB
C/I dn                                    23.3 dB                    Set CDMA margin to 0 to get correct UL pwr

Clear Sky C/(N + I)                       4.23 dB                    COPBO                           4 dB
CS Eb/No                                  4.23 dB                    Transponder BW                 36 MHz
Clear Sky (CS)Margin                      2.53 dB
                                                                     %PWR                         7.07   %
D/L Faded C/(N+I)                         4.23 dB                    PEB                          2.55   MHz
D/L faded Eb/No                           4.23 dB                    Occupied BW                  9.45   MHz
D/L Faded Margin                          2.53 dB                    Percentage BW               26.25   %

                                                                     Hub Dia/effec.                  9            0.65
PSD @ ant Flange                         -19.0 dBW / 4KHz            Rx Gain / G/T               59.16           37.40
Occupied BW                             9450.0 KHz                   Tx Gain                     60.69
D/L PSD/4KHz                               2.1 dBW/4KHz              Spread Factor                   1

                                     Tx Site        Rx Site
Az Angle                             212.70         215.68     deg
El Angle                              39.39          36.59     deg
Pol Angle                             24.83          26.33     deg


                                              SES 1- Link Budget
                      Data Parameters                                          Satellite Parameters
Data Rate                             4096.0 kbps              Sat Name                      SES-1
FEC                                     1/2 Turbo              Sat Long.                       101 deg
Modulation                              bpsk BPSK / QPSK       Sat Rx, G/T                        4 dB/K
Threshold Eb/No                          3.50 dB               Sat Tx, EIRP                      51 dBW
Occ BW                                   1.40                  SFD                              -87 dBW/m^2
Spread Spectrum                             n (Y / N)          IP / OP ratio                      3 dB
Chip Rate                                8.19 Mchips/s         U/L Freq                       14.25 GHz
Total # of spread Links                     1                  D/L Freq.                      11.95 GHz
Beta Factor                              1.00
                     Rx Site Parameters                                        Tx Site Parameters
Rx Site Name                     Atlanta Hub                   Tx Site Name          SanFrancisco
Rx Lat                                   32.5 deg              Tx Lat                       37.75 deg
Rx Long                                    84 deg              Tx Long                      122.7 deg
Rx G/T                                   34.2 dB/K             Tx Ant Gain                     36 dBi
Ant Gain                                 55.9 dBi              Tx Loss                          0 dB
System Temp                               150 K                Radome loss                    0.5 dB
                                                               Pointing Loss                  0.5 dB
                      Interference Parameters                  Tx HPA                       23.81 W
ASI U/L EIRP in our direction I             5.2 dBW/411-1z
DL interferernce, dBW/4KHz                  -20 dBW/4KHz       Downlink Fade I                0.0 dB



Threshold C/N                           0.49 dB
C/lo Uplink WRT Saturation              52.1 dB/Hz
C/lo Downlink WRT Saturation           107.0 dB/Hz

Tx Slant Range                   37836921.8 m                  Rx Slant Range         37321342.2 m
Tx FSL                                207.1 dB                 Rx FSL                      205.4 dB
Uplink EIRP                            48.8 dBW                OPBO                         24.5 dB
Uplink C/No                            73.6 dB-HZ              D/L EIRP                     26.5 dBW
U/L C/N                                 4.5 dB                 D/L C/No                     83.4 dB/Hz
G(1m^2) Tx                             44.5 dBi                D/L C/N                      14.3 dB
U/L flux density @ satellite         -114.5 dBW/mA2
IPBO                                   27.5 dB

C/I up                                   10.4 dB
C/I do                                   13.4 dB

Clear Sky C/(N + I)                      2.74 dB
CS Eb/No                                 5.75 dB
Clear Sky (CS)Margin                     2.25 dB

D/L Faded C/(N+1)                        2.74 dB
D/L faded Eb/No                          5.75 dB
D/L Faded Margin                         2.25 dB


PSD © ant Flange                       -21.3 dBW / 4KHz
Occupied BW                          11468.8 KHz
D/L PSD/4KHz                            -8.1 dBW/4KHz

                                    Tx Site        Rx Site
Az Angle                            146.98         209.64    deg
El Angle                             40.70          47.95    deg
Pol Angle                           -25.53          24.65    deg


                                              AMC 5 Link Budget
                      Data Parameters                                          Satellite Parameters
Data Rate                            4096.0 kbps               Sat Name                     AM C-5
FEC                                     1/2 Turbo              Sat Long.                      80.9 deg
Modulation                             qpsk BPSK / CIPSK       Sat Rx, GPI"                      5 dB/K
Threshold Eb/No                         3.50 dB                Sat Tx, EIRP                     47 dBW
Occ BW                                  1.40                   SFD                             -91 dBW/mA2
Spread Spectrum                            n (Y / N)           IP / OP ratio                     6 dB
Chip Rate                               4.10 Mchips/s          U/L Freq                      14.25 GHz
Total # of spread Links                    1                   D/L Freq.                     11.95 GHz
Beta Factor                             1.00
                     Rx Site Parameters                                        Tx Site Parameters
Rx Site Name                      MCL Hub                      Tx Site Name          SanFrancisco
Rx Lat                                    39 deg               Tx Lat                       37.75 deg
Rx Long                                   77 deg               Tx Long                      122.7 deg
Rx G/T                                  33.3 dB/K              Tx Ant Gain                     36 dBi
Ant Gain                                55.1 dBi               Tx Loss                          0 dB
System Temp                              150 K                 Radome loss                    0.5 dB
                                                               Pointing Loss                  0.5 dB
                     Interference Parameters                   Tx HPA                       15.54 W
ASI U/L EIRP in our direction I           -1.7 dBW/4KHz
DL interferemce, dBW/4KHz                  -23 dBW/4KHz        Downlink Fade                 0.0 dB



Threshold C/N                           3.50 dB
Vic) Uplink WRT Saturation              59.0 dB/Hz
C/lo Downlink WRT Saturation           106.0 dB/Hz

Tx Slant Range                    38857601.6 m                 Rx Slant Range         37545940.1 m
Tx FSL                                 207.3 dB                Rx FSL                      205.5 dB
Uplink EIRP                             46.9 dBW               OPBO                         19.6 dB
Uplink C/No                             72.5 dB-HZ             D/L EIRP                     27.4 dBW
U/L C/N                                  6.4 dB                D/L C/No                     83.4 dB/Hz
G(1m^2) Tx                              44.5 dBi               D/L C/N                      17.2 dB
U/L flux density @ satellite          -116.6 dBW/mA2
IPBO                                    25.6 dB

C/I up                                   18.5 dB
C/I do                                   20.3 dB

Clear Sky C/(N + I)                      5.65 dB
CS Eb/No                                 5.65 dB
Clear Sky (CS)Margin                     2.15 dB

D/L Faded C/(N+I)                        5.65 dB
D/L faded Eb/No                          5.65 dB
D/L Faded Margin                         2.15 dB


PSD © ant Flange                       -20.2 dBW / 4KHz
Occupied BW                           5734.4 KHz
D/L PSD/4KHz                            -4.1 dBW/4KHz

                                    Tx Site        Rx Site
Az Angle                            124.40         186.18    deg
El Angle                             28.48          44.67    deg
Pol Angle                           -40.72          4.80     deg


      ATTACHMENT B
RADIATION HAZARD ANALYSIS


                                  Radiation Hazard Analysis

                                              E-7000


This analysis predicts the radiation levels around a proposed earth station complex, comprised of
a single panel type antenna. This report is developed in accordance with the prediction methods
contained in OET Bulletin No. 65, Evaluating Compliance with FCC Guidelines for Human
Exposure to Radio Frequency Electromagnetic Fields, Edition 97-01, pp 26-30. The maximum
level of non-ionizing radiation to which employees may be exposed is limited to a power density
level of 5 milliwatts per square centimeter (5 mW/cm2) averaged over any 6 minute period in a
controlled environment and the maximum level of non-ionizing radiation to which the general
public is exposed is limited to a power density level of 1 milliwatt per square centimeter (1
mW/cm2) averaged over any 30 minute period in a uncontrolled environment. Note that the
worse-case radiation hazards exist along the beam axis. Under normal circumstances, it is highly
unlikely that the antenna axis will be aligned with any occupied area since that would represent a
blockage to the desired signals, thus rendering the link unusable.

Earth Station Technical Parameter Table
Antenna Aperture Size                 1.2m x 0.212m
Antenna Effective Diameter            0.569 meters
Antenna Surface Area                  0.254 sq. meters
Antenna Isotropic Gain                36.0 dBi
Number of Identical Adjacent Antennas 1
Nominal Antenna Efficiency (ε)        55%
Nominal Frequency                     14.25 GHz
Nominal Wavelength (λ)                0.0211 meters
Maximum Transmit Power / Carrier      40.0 Watts
Number of Carriers                    1
Total Transmit Power                  40.0 Watts
W/G Loss from Transmitter to Feed     1.0 dB
Total Feed Input Power                31.8 Watts
Radome Losses                         0.25 dB
Effective RF Power at radome          30.0 Watts
Near Field Limit                      Rnf = D²/4λ = 3.85 meters
Far Field Limit                       Rff = 0.6 D²/λ = 9.23 meters
Transition Region                     Rnf to Rff = 3.85 meters to 9.23 meters

In the following sections, the power density in the above regions, as well as other critically
important areas will be calculated and evaluated. The calculations are done in the order discussed
in OET Bulletin 65.

1.0 At the Antenna Surface

The power density at the reflector surface can be calculated from the expression:

 PDas = 4P/A = 49.96 mW/cm² (1)
 Where: P = total power at feed, milliwatts
        A = Total area of reflector, sq. cm



                                                                                                 1


In the normal range of transmit powers for satellite antennas, the power densities at or around the
reflector surface is expected to exceed safe levels. This area will not be accessible to the general
public.

This antenna will incorporate a radome which has 0.25 dB of loss. The worst case power density
at the surface of the radome is shown below:

PDradome=4Prad/A = 47.16 mW/cm² (2)
 Where: Prad = total power at feed less radome losses, milliwatts
         A = Total area of reflector, sq. cm (this would represent worst case)

Operators and technicians should receive training specifying this area as a high exposure area.
Procedures must be established that will assure that all transmitters are rerouted or turned off
before access by maintenance personnel to this area is possible.

2.0 On-Axis Near Field Region

The geometrical limits of the radiated power in the near field approximate a cylindrical volume
with a diameter equal to that of the antenna. In the near field, the power density is neither uniform
nor does its value vary uniformly with distance from the antenna. For the purpose of considering
radiation hazard it is assumed that the on-axis flux density is at its maximum value throughout the
length of this region. The length of this region, i.e., the distance from the antenna to the end of the
near field, is computed as Rnf above.

The maximum power density in the near field is given by:

 PDnf = (16ε P)/(π D²) =     26.03 mW/cm² (3)
                             from 0 to 3.85 meters
Evaluation
 Uncontrolled Environment:        Does Not Meet Controlled Limits
 Controlled Environment:          Does Not Meet Uncontrolled Limits

3.0 On-Axis Transition Region

The transition region is located between the near and far field regions. As stated in Bulletin 65,
the power density begins to vary inversely with distance in the transition region. The maximum
power density in the transition region will not exceed that calculated for the near field region, and
the transition region begins at that value. The maximum value for a given distance within the
transition region may be computed for the point of interest according to:

 PDtr =     (PDnf)(Rnf)/R = dependent on R (4)
 where:     PDnf = near field power density
            Rnf = near field distance
            R = distance to point of interest
 PDtr =     26.03 mW/cm²
 For:       3.85 < R < 9.23 meters

We use Eq (4) to determine the safe on-axis distances required for the two occupancy conditions:



                                                                                                     2


Evaluation

 Uncontrolled Environment Safe Operating Distance, (meters), Rsafeu:       100.1
 Controlled Environment Safe Operating Distance, (meters), Rsafec:         20.03

4.0 On-Axis Far-Field Region

The on- axis power density in the far field region (PDff) varies inversely with the square of the
distance as follows:

 PDff = PG/(4πR²) = dependent on R (5)
 where: P = total power at feed
        G = Numeric Antenna gain in the direction of interest relative to isotropic radiator
        R = distance to the point of interest
 For: R > Rff = 9.23 meters
        PDff = 11.15 mW/cm² at Rff

We use Eq (5) to determine the safe on-axis distances required for the two occupancy conditions:

Evaluation

 Uncontrolled Environment Safe Operating Distance,(meters), Rsafeu :       See Section 3
 Controlled Environment Safe Operating Distance,(meters), Rsafec :         See Section 3

5.0 Off-Axis Levels at the Far Field Limit and Beyond

In the far field region, the power is distributed in a pattern of maxima and minima (sidelobes) as a
function of the off-axis angle between the antenna center line and the point of interest. Off-axis
power density in the far field can be estimated using the antenna radiation patterns prescribed for
the antenna in use. Usually this will correspond to the antenna gain pattern envelope defined by
the FCC or the ITU, which takes the form of:

 Goff = 32 - 25log(Θ)
 for Θ from 1 to 48 degrees; -10 dBi from 48 to 180 degrees
 (Applicable for commonly used satellite transmit antennas)

Considering that satellite antenna beams are aimed skyward, power density in the far field will
usually not be a problem except at low look angles. In these cases, the off axis gain reduction may
be used to further reduce the power density levels.

For example: At two (2) degrees off axis At the far-field limit, we can calculate the power density
as:

Goff = 32 - 25log(2) = 32 – 7.52 dBi = 280.2 numeric

 PD2 deg off-axis = PDffx 280.2/G = 0.78 mW/cm2 (6)




                                                                                                    3


6.0 Off-Axis power density in the Near Field and Transitional Regions

According to Bulletin 65, off-axis calculations in the near field may be performed as follows:
assuming that the point of interest is at least one antenna diameter removed from the center of the
main beam, the power density at that point is at least a factor of 100 (20 dB) less than the value
calculated for the equivalent on-axis power density in the main beam. Therefore, for regions at
least D meters away from the center line of the dish, whether behind, below, or in front under of
the antenna's main beam, the power density exposure is at least 20 dB below the main beam level
as follows:

 PDnf(off-axis) = PDnf /100 =0.260 mW/cm² at D off axis (7)

See Section 7 for the calculation of the distance vs. elevation angle required to achieve this rule
for a given object height.

7.0 Evaluation of Safe Occupancy Area in Front of Antenna

The distance (S) from a vertical axis passing through the dish center to a safe off axis location in
front of the antenna can be determined based on the dish diameter rule (Item 6.0). Assuming a flat
terrain in front of the antenna, the relationship is:

 S = (D/ sin α) + (2h - D - 2)/(2 tan α) (8)
 Where: α = minimum elevation angle of antenna
         D = dish diameter in meters
         h = maximum height of object to be cleared, meters

For distances equal or greater than determined by equation (8), the radiation hazard will be below
safe levels for all but the most powerful stations (> 4 kilowatts RF at the feed).

   For          D=           0.569 meters
                h=           2.0 meters, delta between antenna and object >1 m
   Then:
                α            S
                10           1.7 meters
                15           1.1 meters
                20           0.9 meters
                25           0.7 meters
                30           0.6 meters




                                                                                                      4


8.0 Summary of Results

The earth station site will be protected from uncontrolled access by virtue of the fact that it will
be mounted on the roof of a vehicle. There will also be proper emission warning signs placed and
all operating personnel will be aware of the human exposure levels at and around the earth
station. The applicant agrees to abide by the conditions specified in Condition 18 provided below:

        (18) - The Raysat Antenna Systems LLC shall take all reasonable and customary
        measures to ensure that the MET does not create potential for harmful non-
        ionizing radiation to persons who may be in the vicinty of the MET when it is in
        operation. At a minimum, permanent warning label(s) shall be affixed to the MET
        warning of the radiation hazard and including a diagram showing the regions
        around the MET where the radiation levels could exceed 1.0mW/cm2. The
        operator of the MET shall be responsible for assuring that individuals do not
        stray into the region around the MET where there is a potential for exceeding the
        maximum permissible exposure limits required by Section 1.1310 of the
        Commission’s rules 47 C.F.R § 1.1310. This shall be accomplished by means of
        signs, caution tape, verbal warnings, placement of the MET so as to minimize
        access to the hazardous region and/or any other appropriate means

The table below summarizes all of the above calculations.




                                                                                                  5


                         Parameter                     Abbr.             Units                      Formula

Antenna Effective Diameter                              Df     0.569    meters
Antenna Centerline                                      h        2      meters
                                                                               2                             2
Antenna Surface Area                                    Sa     0.254    meter                       (π*Df )/4
Antenna Ground Elevation                                GE        2     meters
Frequency of Operation                                   f     14.25     GHz
Wavelength                                               λ     0.0211   meters
HPA Output Power                                       PHPA     40       watts
HPA to Antenna Loss                                     LTx      1        dB
Radome Loss                                            LRad     0.25      dB
                                                                                                            -1
Transmit Power at Flange                                P      31.77     watts                  P/10Log (LTx/10)
                                                                                                   -1
Effective Power after Radome                                   30.00     watts            P/10Log (Radome Loss/10)
Antenna Gain                                            Ges     36        dBi             does not include radome loss
Antenna Aperature Efficiency                             η     55%        n/a

1. Reflector Surface Region Calculations
                                                                               2                                             2
Antenna Surface Power Density                          Pdas    499.6    W/m                      (16 * P)/(π * D )
                                                                                   2
                                                               49.96    mW/cm
                                                                               2                                             2
Power at Radome Surface                                Pdrad   471.6    W/m                      (16 * P)/(π * D )
                                                                                   2
(outside radome)                                               47.16    mW/cm            Does not meet controlled limits
                                                                                        Does not meet uncontrolled limits

2. On Axis Near Field Calculations
                                                                                                        2
Extent of Near Field                                    Rn     3.846    meters                     D / (4 * λ)
                                                               12.620    feet
                                                                               2                                                 2
Near Field Power Density                               PDnf    260.3     w/m                   (16 * η *P)/(π * D )
                                                                                   2
                                                               26.03    mW/cm            Does not meet controlled limits
                                                                                        Does not meet uncontrolled limits

3. On Axis Transition Region Calculations
                                                                                                        2
Extent of Transition Region (min)                       RTr    3.846    meters                     D / (4 * λ)
Extent of Transition Region (min)                              12.620    feet
                                                                                                                 2
Extent of Transition Region (max)                       RTr    9.231    meters                     0.6 * D / λ
Extent of Transition Region (max)                              30.287    feet
                                                                               2
Worst Case Transition Region Power Density             PDtr    260.3     w/m
                                                                                   2
                                                               26.03    mW/cm            Does not meet controlled limits
                                                                                        Does not meet uncontrolled limits
Uncontrolled enviorment safe operating distance        Rsu     100.1    meters                   (PDnf)/Rnf)/Rsu
Controlled enviorment safe operating distance          Rsc      20.0    meters                   (PDnf)/Rnf)/Rsc

4. On Axis Far Field Calculations
                                                                                                                 2
Distance to Far Field Region                            Rf      9.23    meters                     0.6 * D / λ
                                                               30.29     feet
                                                                              2                                                      2
On Axis Power Density in the Far Field                 PDff    111.5    W/m                  (Ges * P) / (4 * π * Rf )
                                                                                   2
                                                               11.15    mW/cm            Does not meet controlled limits
                                                                                        Does not meet uncontrolled limits

5. Off-axis Power Density in the Far Field Limit and Beyond
                                                                               2                                     2
Antenna Surface Power Density                          PDs      7.8     W/m            (Ges * P) / (4 * π * Rf ) * (Goa/Ges)
Goa/Ges at a sample angle of θ=2 degrees                       0.070                          Goa = 32 - 25*log(θ)
                                                                                   2
                                                                0.78    mW/cm

6. Off Axis Power Density in the Near Field and Transitional Region Calculations
                                                                               2                                         2
Power Density of Wn/100 for 1 diameter                 PDs      2.60    W/m                [(16 * η *P)/(π * D )] / 100
                                                                                   2
removed                                                        0.260    mW/cm                Meets controlled limits
                                                                                            Meets Uncontrolled limits
7.0 Off-axis Safe Distances from Earth Station
minimum elevation angle of antenna                       α      10      degree
hieght of object to be cleared                           h       2      meter
Groun elevation delta antenna-obstacle elevation ang    GD       S
                                                        10      1.7     meter           S=(D/sinα) + (2h - D- 2) / (2tanα)
                                                        15      1.1     meter
                                                        20      0.9     meter
                                                        25      0.7     meter
                                                        30      0.6     meter

Note: Maximum FCC power density limits for 6GHz is 1mW/cm2 for general population exposure as per FCC OS&T




                                                                                                                                         6


      ATTACHMENT C
GRANT OF EXPERIMENTAL STA


Ilan Kaplan, 8460-D Tyco Road, Vienna, VA 22102,

                                                  United States of America
                                             FEDERAL COMMUNICATIONS COMMISSION
                                                      EXPERIMENTAL
                                            SPECIAL TEMPORARY AUTHORIZATION


                  EXPERIMENTAL                                                                                         WF9XEG
                 (Nature of Service)                                                                                   (Call Sign)

               XD     MO                                                                                           0583-EX-ST-2011
                (Class of Station)                                                                                  (File Number)

  NAME                                               Raysat Antenna Systems, LLC
  This Special Temporary Authorization is granted upon the express condition that it may be terminated by the Commission at any time without
  advance notice or hearing if in its discretion the need for such action arises. Nothing contained herein shall be construed as a finding by
  the Commission that the authority herein granted is or will be in the public interest beyond the express terms hereof.

  This Special Temporary Authorization shall not vest in the grantee any right to operate the station nor any right in the use of the frequencies
  designated in the authorization beyond the term hereof, nor in any other manner than authorized herein. Neither the authorization nor the right
  granted hereunder shall be assigned or otherwise transferred in violation of the Communications Act of 1934. This authorization is
  subject to the right of use of control the Government of the United States conferred by Section 706 of the Communications Act of 1934.

  Special Temporary Authority is hereby granted to operate the apparatus described below:




Purpose Of Operation:
Testing


Station Locations
(1) MOBILE: CONUS
Frequency Information


  MOBILE: CONUS

                                                   Station         Emission                  Authorized                  Frequency
                Frequency                          Class          Designator                 Power                       Tolerance (+/-)
                  14-14.5 GHz                         MO                                   58210 W (ERP)
                                                                   7M75G7W
                                                                   9M45G7W



  Special Conditions:
  (1)  In lieu of frequency tolerance, the occupied bandwidth of the emission shall not
       extend beyond the band limits set forth above.
  (2)  Licensee shall comply with the FCC CFR 47 Part 25.222 rules.




                                                                                                          FEDERAL
                                                                                                       COMMUNICATIONS
 This authorization effective            October 05, 2011                and
                                                                                                         COMMISSION
 will expire 3:00 A.M. EST               April 03, 2012

                                                                    Page 1 of 2


Licensee Name: Raysat Antenna Systems, LLC   File Number: 0583-EX-ST-2011 Call Sign: WF9XEG

  Special Conditions:
  (3)  National Science Foundation (NSF) requests that licensee:

         1) Coordinate operation at the Taunton, MA site with the National Radio Astronomy
         Observatory's VLBA site at Hancock, NH. (POC Mr. Dan Mertely at Socorro, NM,
         Phone: 505- 835-7027 and e-mail: dmertely@nrao.edu).

         2) Coordinate operation at the Fredericksburg, VA site with Wes Sizemore at Green
         Bank. (Phone: 304-456-2107, e-mail:wsizemor@nrao.edu).


  (4)  Off-axis EIRP spectral density for cross-polarized signals emitted from the earth
       station shall not exceed the calculations given in 47CFR25.222(a)(4).
  (5)  In accordance with Article 4.4 of the ITU Radio Regulations, the operations
       authorized herein shall not cause harmful interference to, and shall not claim
       protection from harmful interference caused by, a station operating in accordance
       with the provisions of the ITU Constitution, the ITU Convention, and the ITU Radio
       Regulations.
  (6)  Note that if, during the term of this authorization, NASA seeks to provide protection
       to a future TDRSS site that has been coordinated through the National
       Telecommunications and Information Administration (NTIA) Interdepartment Radio
       Advisory Committee (IRAC) Frequency Assignment Subcommittee process, NTIA
       will notify the Commission that the site is nearing operational status. Upon notice
       from the Commission, licensee must cease operations in the 14.0-14.2 GHz band
       within 125 km of the new TDRSS site until Lockheed Martin Corp. has coordinated
       with the new site. After coordination, operations will then again be permitted in the
       14.0-14.2 GHz band within 125 km of the new TDRSS site, subject to any
       operational constraints developed in the coordination process.
  (7)  No transmissions are permitted between 14.0 GHz and 14.2 GHz within 125 km of
       White Sands, NM (latitude: 32° 20' 59" N, longitude 106° 36' 31" W and latitude: 32°
       32' 40" N, longitude 106° 36' 48" W).
  (8)  Licensee shall comply with the Minimum Angle of Antenna Elevation criteria set forth
       in Part 25.205 of the FCC's rules.
  (9)  No transmissions are permitted between 14.0 GHz and 14.2 GHz within 125 km of
       Blossom Point, MD (latitude: 38° 25' 44" N, longitude 77° 05' 20" W).
  (10) POINT OF COMMUNICATION: Galaxy 16
  (11) The power out of the transmitter should be 40 watts.




                                                     Page 2 of 2



Document Created: 2012-02-08 19:00:30
Document Modified: 2012-02-08 19:00:30

© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC