Attachment EngineeringStatement

This document pretains to SAT-MOD-20160219-00019 for Modification on a Satellite Space Stations filing.

IBFS_SATMOD2016021900019_1126877

Engineering Statement
1   Introduction
Intelsat License LLC (“Intelsat”) seeks authority in this application to operate the satellite
designated as Intelsat 1R from 50.1° W.L.

The characteristics of the Intelsat 1R spacecraft, as well as its compliance with the various
provisions of Part 25 of the Federal Communication Commission’s (“FCC or “Commission”)
rules, are provided in the remainder of this Engineering Statement, which updates the beam gain
contours. In all other respects, the characteristics of Intelsat 1R are the same as those described in
SAT-MOD-20090720-00073.

2   Spacecraft Overview
Intelsat 1R is a Boeing 702MP spacecraft that is capable of operating in C-band and Ku-band
frequencies listed below.

                                   Direction              Frequency
                                                       5925 – 6425 MHz
                                    Uplink
                                                      13750 – 14500 MHz
                                                       3700 – 4200 MHz
                                                      10950 – 11200 MHz
                                   Downlink
                                                      11450 – 11700 MHz
                                                      11700 – 11950 MHz


The spacecraft provides the following coverage:

    Beam                  Coverage
    US/Latin America United States, Central America, South America
    Europe/Africa         Europe, Africa
    US/Mexico             United States, Mexico, Caribbean, Central America
    South America         South America
    Combined Uplink       United States, Mexico, Caribbean, Central America, Europe, Africa
    Global                Global


2.1 Spacecraft Characteristics



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Intelsat 1R is a three-axis stabilized type spacecraft that has a rectangular outer body structure.
Intelsat 1R utilizes two deployable solar array wings and a number of deployable and non-
deployable antennas.

The Intelsat 1R spacecraft is composed of the following subsystems:

         Thermal
         Power
         Attitude Control
         Propulsion
         Telemetry, Command and Ranging
         Uplink Power Control
         Communications

These subsystems maintain the correct position and attitude of the spacecraft; ensure that all
internal units are maintained within the required temperature range; and ensure that the
spacecraft can be commanded and controlled with a high level of reliability from launch to the
end of its useful life. The spacecraft design incorporates redundancy in all of the various
subsystems in order to avoid single-point failures.

The structural design of Intelsat 1R provides mechanical support for all subsystems. The
structure supports the communication antennas, solar arrays, and thrusters. It also provides a
stable platform for preserving the alignment of critical elements of the spacecraft.

2.2 Communication Subsystem
Intelsat 1R provides active communication channels at C-band and Ku-band frequencies each
having a bandwidth of 36 MHz. The Intelsat 1R frequencies, polarization, and channel plan are
provided in the Schedule S.

The coverage contours and performance characteristics of all Intelsat 1R beams are provided in
the Schedule S. Exhibits 1 and 2 provide the beam parameters for the Intelsat 1R uplink and
downlink beams, respectively.

2.3 Telemetry, Command and Ranging Subsystem
The telemetry, command and ranging (“TC&R”) subsystem provides the following functions:

   1) Acquisition, processing and transmission of spacecraft telemetry data;

   2) Reception and retransmission of ground station generated ranging signals; and

   3) Reception, processing and distribution of telecommands.



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The Intelsat 1R command and telemetry channel frequencies are shown in Exhibit 3. The
coverage patterns of the on-station command and telemetry beams are provided in the Schedule
S. The coverage patterns of the bi-conical emergency command and telemetry beams have gain
contours that vary by less than 8 dB across the surface of the Earth and accordingly the gain at 8
dB below the peak falls beyond the edge of the Earth. Therefore, pursuant to Section
25.114(c)(4)(vi)(A) of the FCC’s rules, contours for these beams are not required to be provided
and the associated GXT files have not been included in Schedule S. The Intelsat 1R command
and telemetry subsystem performance is summarized in Exhibit 3.

2.4 Uplink Power Control Subsystem
Intelsat 1R utilizes two Ku-band channels for uplink power control (“ULPC”), antenna tracking,
and ranging. The coverage patterns of the ULPC beams are provided in the Schedule S. The
Intelsat 1R ULPC frequencies and subsystem performance are summarized in Exhibit 3.

2.5 Satellite Station-Keeping
The spacecraft will be maintained within 0.05° of its nominal longitudinal position in the east-
west direction. Accordingly, it will be in compliance with Section 25.210(j) of the
Commission’s rules.

The attitude of the spacecraft will be maintained with accuracy consistent with the achievement
of the specified communications performance, after taking into account all error sources (i.e.,
attitude perturbations, thermal distortions, misalignments, orbital tolerances and thruster
perturbations, etc.).

3   Services
Intelsat 1R is a general purpose communications satellite and has been designed to support
various services offered within the Intelsat satellite system. Depending upon the needs of the
users, the transponders on Intelsat 1R can accommodate television, radio, voice, and data
communications. Typical communication services include:

    a) Compressed digital video

    b) High speed digital data

    c) Digital single channel per carrier (“SCPC”) data channels

Emission designators and allocated bandwidths for representative communication carriers are
provided in Schedule S.

4   Power Flux Density



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The power flux density (“PFD”) limits for space stations operating in the 3700 – 4200 MHz,
10950 – 11200 MHz, and 11450 -11700 MHz bands are contained in Section 25.208 of the
Commission’s rules. Neither the Commission’s rules nor the ITU Radio Regulations specify any
PFD limits for the 11700 – 11950 MHz band applicable to geostationary satellites operating in
the fixed satellite service.

The maximum PFD levels for the Intelsat 1R transmissions were calculated for the 3700 – 4200
MHz, 10950 – 11200 MHz, and 11450 -11700 MHz bands. The results are provided in Schedule
S and show that the downlink power flux density levels of the Intelsat 1R carriers do not exceed
the limits specified in Sections 25.208 of the Commission’s rules.

5    Emission Compliance
Section 25.202(e) of the Commission’s rules requires that the carrier frequency of each space
station transmitter be maintained within 0.002% of the reference frequency. Intelsat 1R is
designed to be compliant with the provisions of this rule.

Intelsat will comply with the provisions of Section 25.202(f) of the Commission’s rules with
regard to Intelsat 1R emissions.

6    Orbital Location
Intelsat requests that it be assigned the 50.1° W.L. orbital location for Intelsat 1R. The 50.1°
W.L. location satisfies Intelsat 1R requirements for optimizing coverage, elevation angles, and
service availability. Additionally, the location also ensures that the maximum operational,
economic, and public interest benefits will be derived.

7    Coordination with Co-frequency Space Stations
The Intelsat 1R transmissions will comply with the levels contained in Sections 25.212(c) and
(d) and Section 25.140(a)(3)(i) and (ii) of the Commission’s rules, as recently amended,1 unless
higher levels are coordinated with affected adjacent satellite operators within ±6.

8    Orbital Debris Mitigation Plan
Intelsat is proactive in ensuring safe operation and disposal of this and all spacecraft under its
control. The four elements of debris mitigation are addressed below.

8.1 Spacecraft Hardware Design

1
 Intelsat understands that the FCC will apply the new rules and procedures to pending applications as soon as these
rules become effective. See Comprehensive Review of Licensing and Operating Rules for Satellite Services, Second
Report and Order, IB Docket No. 12-267, FCC 15-167 at ¶ 333 (rel. Dec. 17, 2015).




                                                  Page 4 of 10


The spacecraft is designed such that no debris will be released during normal operations. Intelsat
has assessed the probability of collision with meteoroids and other small debris (<1 cm diameter)
and has taken the following steps to limit the effects of such collisions: (1) critical spacecraft
components are located inside the protective body of the spacecraft and properly shielded; and
(2) all spacecraft subsystems have redundant components to ensure no single-point failures. The
spacecraft does not use any subsystems for end-of-life disposal that are not used for normal
operations.

8.2 Minimizing Accidental Explosions
Intelsat has assessed the probability of accidental explosions during and after completion of
mission operations. The spacecraft is designed in a manner to minimize the potential for such
explosions. Propellant tanks and thrusters are isolated using redundant valves and electrical
power systems are shielded in accordance with standard industry practices. At the completion of
the mission and upon disposal of the spacecraft, Intelsat will ensure that all active units are
turned off. However, due to the design of Intelsat 1R, Intelsat will not be able to vent all
pressurized systems. Intelsat previously received waiver of Section 25.283(c) of the
Commission’s rules, 47 C.F.R. § 25.283.2

8.3 Safe Flight Profiles
Intelsat has assessed and limited the probability of the space station becoming a source of debris
as a result of collisions with large debris or other operational space stations. Once relocated to
50.1° W.L., Intelsat 1R will not be located at an orbital location that has an overlapping station-
keeping volume with another satellite.

During the relocation of Intelsat 1R, Intelsat will take all the necessary steps to coordinate the
move internally to minimize the risk of collision or interference between Intelsat 1R and Intelsat
29e. Intelsat is not aware of any other FCC licensed system, or any other system applied for and
under consideration by the FCC, that will have an overlapping station-keeping volume with
Intelsat 1R. Intelsat is also not aware of any system with an overlapping station-keeping volume
with Intelsat 1R that is the subject of an ITU filing and that is either in orbit or progressing
towards launch.

8.4 Post Mission Disposal
At the end of the mission, Intelsat expects to dispose of the spacecraft by moving it to a planned
minimum altitude of 300 kilometers above the geostationary arc. This altitude exceeds the
minimum altitude established by the Inter-Agency Space Debris Coordination Committee


2
 See PanAmSat Licensee Corp. Application to Modify License for Intelsat 1R, File No. SAT-MOD-20090720-
00073 at ¶ 8 (stamp grant issued by Steve Duall on Aug. 5, 2010)


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(“IADC”) formula. Intelsat has reserved 30.035 kilograms of xenon for this purpose. The
reserved xenon figure was determined by the spacecraft manufacturer and is provided for in the
propellant budget. This figure was calculated taking into account the expected mass of the
satellite at the end of life and the required delta-velocity to achieve the desired orbit. The fuel
gauging uncertainty has been taken into account in these calculations.

In calculating the disposal orbit, Intelsat has used simplifying assumptions as permitted under the
Commission’s Orbital Debris Report and Order.3 For reference, the effective area to mass ratio
(Cr*A/M) of the Intelsat 1R spacecraft is 0.0625 m2/kg, resulting in a minimum perigee disposal
altitude under the IADC formula of at most 297.4 kilometers above the geostationary arc.
Accordingly, the Intelsat 1R planned disposal orbit complies with the FCC’s rules.


9      TC&R Control Earth Stations
Intelsat will conduct TC&R operations through one or more of the following earth stations:
Castle Rock, Colorado and Fillmore, California. Additionally, Intelsat is capable of remotely
controlling Intelsat 1R from its facilities in McLean, VA.




3
    Mitigation of Orbital Debris, Second Report and Order, IB Docket No. 02-54, FCC 04-130 (rel. June 21, 2004).


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Certification Statement

I hereby certify that I am a technically qualified person and am familiar with Part 25 of the
Commission’s rules. The contents of this engineering statement were prepared by me or under
my direct supervision and to the best of my knowledge are complete and accurate.



          /s/ Candice DeVane                             February 19, 2016

         Candice DeVane                                          Date
              Intelsat
      Manager, Spectrum Policy




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                                          EXHIBIT 1

COMMUNICATION SUBSYSTEM UPLINK BEAM PARAMETERS
 Beam Name             C-Band Linear             C-Band Linear            C-Band Linear            C-Band Linear
 Schedule S Beam ID         ACHU                     ACVU                     ECVU                     GCHU
 Frequency Band
                          5925 – 6425             5925 – 6425               5925 – 6425              5925 – 6425
 (MHz)
 Polarization             Horizontal                Vertical                 Vertical                Horizontal
 Beam Peak Gain
                              29.1                    28.4                     28.8                     19.6
 (dBi)
 G/T (dB/K)                    1.4                     1.3                      1.2                      -8.2
 Minimum SFD--
                              -99.3                   -98.4                    -94.9                    -88.8
 (dBW/m2)



 Beam Name            KU-Band Linear             KU-Band Linear           KU-Band Linear           KU-Band Linear
 Schedule S Beam ID         NKHU                     NKVU                     SKVU                     SKHU
 Frequency Band
                       13750 - 14500              13750 - 14500            13750 - 14500            13750 - 14500
 (MHz)
 Polarization             Horizontal                Vertical                 Vertical                Horizontal
 Beam Peak Gain
                              33.9                    33.3                     33.1                     32.6
 (dBi)
 G/T (dB/K)                    6.8                     6.8                      6.5                      6.1
 Minimum SFD--
                            -104.8                    -104.2                   -104.6                   -104.1
 (dBW/m2)



         Beam Name                   KU-Band Linear          KU-Band Linear           KU-Band Linear
         Schedule S Beam ID              EKHU                     EKVU                     CKVU
         Frequency Band
                                      13750 - 14500            13750 - 14500            13750 - 14500
         (MHz)
         Polarization                  Horizontal                Vertical                 Vertical
         Beam Peak Gain
                                          33.8                     31.6                     33.3
         (dBi)
         G/T (dB/K)                        6.6                      4.8                      6.5
         Minimum SFD--
                                         -104.9                   -102.9                   -104.3
         (dBW/m2)




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                                             EXHIBIT 2

COMMUNICATION SUBSYSTEM DOWNLINK BEAM PARAMETERS
   Beam Name                C-Band Linear           C-Band Linear           C-Band Linear           C-Band Linear
   Schedule S Beam ID           ACHD                    ACVD                    ECHD                    GCVD
   Frequency Band
                             3700 - 4200              3700 - 4200            3700 - 4200              3700 - 4200
   (MHz)
   Polarization              Horizontal                Vertical               Horizontal               Vertical
   Peak Antenna Gain
                                 28.0                    27.8                    28.5                    19.3
   (dBi)
   EIRP (dBW)                    43.7                    43.4                    41.9                    34.6



   Beam Name               Ku-Band Linear           Ku-Band Linear          Ku-Band Linear          Ku-Band Linear
   Schedule S Beam ID           NKHD                    NKVD                    SKHD                    S1KV
   Frequency Band          10950 – 11200 &
                                                    10950 – 11200           11700 - 11950           11700 - 11950
   (MHz)                    11450 – 11700
   Polarization              Horizontal                Vertical               Horizontal               Vertical
   Peak Antenna Gain
                                 31.9                    31.6                    33.1                    33.1
   (dBi)
   EIRP (dBW)                    50.9                    50.3                    52.9                    53.0



            Beam Name                   Ku-Band Linear          Ku-Band Linear          Ku-Band Linear
            Schedule S Beam ID              S2KV                    EKHD                    EKVD
            Frequency Band                                                          10950 – 11200 &
                                        11450 - 11700           11450 - 11700
            (MHz)                                                                    11450 – 11700
            Polarization                   Vertical               Horizontal               Vertical
            Peak Antenna Gain
                                             33.1                    32.8                    31.3
            (dBi)
            EIRP (dBW)                       52.1                    52.3                    50.3




                                              Page 9 of 10


                                    EXHIBIT 3

                TC&R SUBSYSTEM CHARACTERISTICS


                                        Command           Command         Command
     Beam Name
                                        US/Mexico          Bicone           Pipe
     Schedule S Beam ID                  CMDC              CMDB            CMDP
     Frequencies (MHz)                     13995.0         13995.0            14498.5
     Polarization                       Horizontal         Vertical           LHCP
     Peak Antenna Gain (dBi)                33.9             3.5                4.7



                               Telemetry     Telemetry    Telemetry
Beam Name                                                             ULPC              ULPC
                               US/Mexico      Bicone         Pipe
Schedule S Beam ID               TLMC         TLMB          TLMP      UPCR              UPCL
                               11696.0 &     11696.0 &    11696.0 &
Frequencies (MHz)                                                     11699.0           11699.0
                                11697.0       11697.0      11697.0
Polarization                    Vertical     Horizontal     LHCP      RHCP              LHCP
Peak Antenna Gain (dBi)          31.6              3.7       4.5       19.0              19.0
Maximum Channel EIRP (dBW)       15.0              11.8     10.7       11.2              11.2



Note: RHCP: Right Hand Circular Polarization, LHCP: Left Hand Circular Polarization




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Document Created: 2016-02-19 16:05:47
Document Modified: 2016-02-19 16:05:47

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