Attachment Technical Annex SAT-MOD-20160722-00067

Attachment Technical Annex

This document pretains to SAT-MOD-20160722-00067 for Modification on a Satellite Space Stations filing.

IBFS_SATMOD2016072200067_1144490

ECHOSTAR-18

ATTACHMENT A (TECHNICAL ANNEX)
Technical Information to Supplement Schedule S

A.1 Scope

This attachment contains the information required by § 25.114(c) and other sections of Part 25 of
the Commission’s rules that cannot be entered into the Schedule S software.

A.2 General Description of Overall System Facilities, Operations and Services
(§25.114(d)(1))

The ECHOSTAR-18 satellite will operate at the 61.35° W.L. orbital location as an in-orbit spare
satellite in the Broadcasting-Satellite Service/Direct Broadcast Satellite (“BSS” or “DBS”)
service.

The ECHOSTAR-18 satellite will operate within the 17.3-17.8 GHz BSS feeder uplink band (ITU
Appendix 30A) and the 12.444-12.7 GHz BSS downlink band (ITU Appendix 30). The channel
center frequencies are identical to that prescribed in the ITU’s Region 2 BSS Plan. The
bandwidth of each channel is 26 MHz. On the uplink, the satellite is capable of using all 32 ITU
Region 2 BSS channels. On the downlink, the satellite is capable of using the upper sixteen
channels defined by the ITU Region 2 BSS Plan (i.e., channels 17 through to 32, inclusive).

The ECHOSTAR-18 satellite solely utilizes spot beams for transmission of the communications
carriers. There are five uplink spot beams (operating in both circular polarizations). The five
feeder link sites are located at Cheyenne, WY, Gilbert, AZ, Monee, IL, Mount Jackson, VA, and
New Braunfels, TX. There are a total of forty-eight downlink spot beams. Details regarding
1

A.3 Space Station Transmit and Receive Capabilities
(§25.114(c)(4)(ii) and §25.114(c)(4)(v))

The maximum downlink EIRP levels of the spot beams range between 55.5 dBW and 60 dBW.
The maximum downlink EIRP level of each the spot beam is stated in the associated Schedule S
form. The maximum downlink EIRP density of each spot beam can be derived from the formula:

Maximum EIRP Density = Maximum EIRP – 10*log (25.8E6/4E3) dBW/4kHz

For all uplink spot beams, the minimum and maximum saturating flux densities, respectively, are: -
100 dBW/m2 and -80 dBW/m2.

A.4 Predicted Space Station Antenna Gain Contours
(§25.114(c)(4)(vi)(A))

The ECHOSTAR-18 satellite’s antenna gain contours for the receive and transmit beams, as
required by §25.114(c)(4)(vi)(A), are being provided to the Commission in a GIMS database
container. All near-omni-directional beams, used for emergency TT&C operations once the
satellite is on-station, have gain contours that vary by less than 8 dB below peak across the
surface of the visible Earth. Therefore, gain contours for these beams (beams OMNUR,
OMNUL, OMNDR and OMNDL) have not been included in the GIMS container file.

A.5 TT&C Characteristics
(§25.114(c)(4)(i) and §25.114(c)(4)(v))

The information provided in this section complements that provided in the associated Schedule S
form.

The ECHOSTAR-18 TT&C sub-system provides for communications during pre-launch, transfer
orbit and on-station operations, as well as during spacecraft emergencies. The TT&C sub-system
3

will operate at the edges of the uplink and downlink frequency ranges during all phases of the
mission.

During transfer orbit and on-station emergencies the TT&C signals will be received and
transmitted by the satellite using a combination of wide-angle antennas on the satellite that create
a near omni-directional gain pattern. During normal on-station operation, the TT&C signals will
be received and transmitted by the satellite using large-coverage horn antennas.

There are four command receivers: one operating at 17.7935 GHz and two that operate at 17.303
GHz. In addition, there is one “flex” receiver that can be tuned anywhere within the 17.790 -
17.795 GHz and 17.795-17.800 GHz bands by ground command. There are three telemetry
transmitters: one operating at 12.203 GHz or 12.204 GHz, one operating at 12.695 GHz or
12.696 GHz, and one “flex” transmitter that can be tuned anywhere within the 12.690 - 12.695
GHz and 12.695-12.700 GHz bands by ground command.

A summary of the TT&C subsystem is given in Table A.5-1.

Table A.5-1: Summary of the TT&C Subsystem
17,793.5 MHz (RHCP)
Command/Ranging Frequencies 17,303 MHz (LHCP)
17,790 - 17,795 MHz (RHCP)
17,795 - 17,800 MHz (RHCP)
Omni Rx antenna: -83 dBW/m2 (Command)
Uplink Flux Density (Minimum) -78 dBW/m2 (Ranging)
Horn Rx antenna: -93 dBW/m2 (Command)
-87 dBW/m2 (Ranging)
12,695 MHz (RHCP)
12,696 MHz (RHCP)
Telemetry/Ranging Frequencies 12,203 MHz (LHCP)
12,204 MHz (LHCP)
12,690 - 12,695 MHz (RHCP)
12,695 - 12,700 MHz (RHCP)
Maximum Downlink EIRP 14.6 dBW (Omni antenna)
14.3 dBW (Horn antenna)

4

The maximum flux density for all command beams is -57 dBW/m2.

A.6 Interference Analyses
(§25.214(d)(13))

The analyses of the ECHOSTAR-18 satellite network with respect to the limits in Annex 1 to
Appendices 30 and 30A are given in Appendices 1 and 2 to this document.

A.7 Orbital Debris Mitigation Plan
(§25.114(d)(14))

A.7.1 Spacecraft Hardware Design

Space Systems/Loral (“Loral”) is the manufacturer of the ECHOSTAR-18 satellite. Loral has
assessed the launch, orbit raising, deployment and normal operations portions of the mission and
determined that no debris will be released by the spacecraft except for the following case. The
only portion of the mission in which portions of the spacecraft are separated from the main
spacecraft body is during deployment. Separation and deployment mechanisms are intended to
contain the debris generated when activated. There are several reflector deployment hold-down
electro-explosive devices (“EED”s) that have the potential to expel a small amount of debris —
up to 3 milligrams of titanium debris from the hold-down and 2 milligrams of “soot” per firing.
These EEDs have flown on over 36 spacecraft and had no failures. The assessment found no
other sources for debris throughout the mission.

To protect the spacecraft from small body collisions, including debris less than one centimeter in
diameter, the design of the ECHOSTAR-18 spacecraft allows for individual faults without losing
the entire spacecraft. All critical components are built within the structure and shielded from
external influences. Items that cannot be built within the spacecraft nor shielded (such as
antennas) are either redundant or are able to withstand impact. The ECHOSTAR-18 spacecraft
can be controlled through both the large-coverage horn antenna and the wide angle antennas. The

5

likelihood of all antennas being damaged during a small body collision is minimal. The wide angle
antennas on the spacecraft are similar to open waveguides that point towards the Earth (there is
one set on each side of the spacecraft; either set could be used to successfully de-orbit the
spacecraft). These wide angle antennas would continue to operate even if struck and bent.

The ECHOSTAR-18 satellite has separate TT&C and propulsion subsystems that are necessary
for end-of-life disposal. The spacecraft TT&C system is extremely rugged with regard to
meteoroids smaller than 1 cm, by virtue of its redundancy, shielding, separation of components
and physical characteristics. The command receivers and decoders and telemetry encoders and
transmitters are located within a shielded area and are redundant and physically separated. A
single rugged thruster and shielded propellant tank provides the energy for orbit raising.
Otherwise, there are no single points of failure in the system.

A.7.2 Accidental Explosion Assessment
(§25.144(d)(14)(ii))

Loral has reviewed failure modes for all equipment to assess the possibility of an accidental
explosion onboard the spacecraft. In order to ensure that the spacecraft does not explode on
orbit, the satellite controller will take specific precautions. All batteries and fuel tanks are
monitored for pressure or temperature variations. Alarms in the Satellite Control Center (“SCC”)
inform controllers of any variations. Additionally, long term trending analysis will be performed
to monitor for any unexpected trends.

Operationally, batteries will be operated utilizing the manufacturer’s automatic recharging
scheme. Doing so will ensure that charging terminates normally without building up additional
heat and pressure. As this process occurs wholly within the spacecraft, it also affords protection
from command link failures.

In order to protect the propulsion system, fuel tanks will all be operated in a blow down mode.
At the completion of orbit raising, the pressurant will be isolated from the fuel system. This will
cause the pressure in the tanks to decrease over the life of the spacecraft. This will also protect
6

against a pressure valve failure that might otherwise cause the fuel tanks to become over
pressurized.

In order to ensure that the spacecraft has no explosive risk after it has been successfully de-
orbited, all stored energy onboard the spacecraft will be removed. Upon successful de-orbit of
the spacecraft, all propulsion lines and latch valves will be vented and left open. All battery
chargers will be turned off and batteries will be left in a permanent discharge state. These steps
will ensure that no buildup of energy can occur resulting in an explosion in the years after the
spacecraft is de-orbited.

A.7.3 Safe Flight Profiles
(§25.144(d)(14)(iii))

In considering current and planned satellites that may have a station-keeping volume that overlaps
the ECHOSTAR-18 satellite, DISH has reviewed the lists of FCC-licensed satellite networks, as
well as those that are currently under consideration by the FCC. In addition, networks for which
a request for coordination has been submitted to the ITU within ±0.15 degrees of 61.35° W.L.
have also been reviewed.

There are currently four satellites that operate within the 61.5° W.L. cluster, as follows:

• ECHOSTAR-3 at 61.8° W.L.
• ECHOSTAR-15 at 61.65° W.L.
• ECHOSTAR-16 at 61.5° W.L.
• ECHOSTAR-12 at 61.35° W.L.

All four satellites operate with an east-west station-keeping of ±0.05 degrees.

Before the ECHOSTAR-18 satellite is located at 61.35° W.L., the ECHOSTAR-12 satellite will
be located at 61.2° W.L., subject Commission approval.

7

By locating the ECHOSTAR-18 satellite at 61.35° W.L., and maintaining an east-west station-
keeping tolerance of ±0.05 degrees, there will be no overlap of station-keeping volume with any
of the other four satellites, and hence no risk of collision.

There are no pending applications before the Commission for an additional satellite to be located
at an orbital location in the immediate vicinity of 61.35° W.L. In addition, there are no non-USA
networks filed with the ITU for an orbital location within ±0.15 degrees of 61.35° W.L.

Based on the preceding, DISH concludes there is no requirement to physically coordinate the
ECHOSTAR-18 satellite with another satellite operator at the present time.

A.7.4 Post Mission Disposal Plan
(§25.144(d)(14)(iv))

At the end of the operational life of the ECHOSTAR-18 satellite, DISH will maneuver the
satellite to a disposal orbit with a minimum perigee of 300 km above the normal GSO operational
orbit. This proposed disposal orbit altitude exceeds the minimum required by §25.283, which is
calculated below.

The input data required for the calculation is as follows:

Total Solar Pressure Area “A” = 91 m2
“M” = Dry Mass of Satellite = 3346 kg
“CR” = Solar Pressure Radiation Coefficient = 1.5

Using the formula given in §25.283, the Minimum Disposal Orbit Perigee Altitude is calculated as
follows:

= 36,021 km + 1000 x CR x A/m
= 36,021 km + 1000 x 1.5 x 91/3346
= 36,062 km
= 276 km above GSO (35,786 km)

8

Thus, the designed disposal orbit of 300 km above GSO exceeds the required minimum by a
margin of 24 km. Maneuvering the satellite to the disposal orbit will require 15.2 kg of
propellant, and this quantity of fuel, taking account of all fuel measurement uncertainties, will be
reserved to perform the final orbit raising maneuvers.

DISH will apply all available propellant accounting methodologies to track propellant usage. For
the ECHOSTAR-18 satellite, these methodologies include the bookkeeping method, the pressure-
volume-temperature (“PVT”) method, and the propellant depletion gauge operations (“PDGO”)
method.

The bookkeeping method, whereby the estimated propellant used during a thruster-firing event is
subtracted from the beginning of life propellant mass, will be applied after every thruster-firing
event. The PVT method, which uses current state pressure and temperature telemetry received
from the satellite to estimate the remaining propellant, will be applied once a month. The PDGO
method uses propellant temperature measurements taken while tank heaters are activated to
determine more accurately the amount of oxidizer and fuel in tanks at the end of mission life. The
PDGO method will be applied annually until propellant analysis shows 60 kg or less propellant
remaining, after which the PDGO method will be applied after every north-south station-keeping
maneuver. Combined, these methods will ensure the necessary amount of fuel is reserved to
perform deorbit procedures as well as maximize fuel depletion when the ECHOSTAR-18 satellite
reaches its disposal orbit.

___________________________________

9

CERTIFICATION OF PERSON RESPONSIBLE FOR PREPARING
ENGINEERING INFORMATION

I hereby certify that I am the technically qualified person responsible for preparation of the

engineering information contained in this application, that I am familiar with Part 25 of the

Commission’s rules, that I have either prepared or reviewed the engineering information

submitted in this application and that it is complete and accurate to the best of my knowledge and

belief.

/s/
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Stephen D. McNeil
Telecomm Strategies Canada, Inc.
Ottawa, Ontario, Canada
(613) 270-1177

10

APPENDIX 1 TO ATTACHMENT A

The ECHOSTAR-18 satellite will operate under the USABSS-37 network. This network was
published in IFIC 2733. Accordingly, all analyses contained within this Appendix have been
performed against the networks that were published as of IFIC 2733.

Analysis of ANNEX 1 of Appendix 30

1 Limits for the interference into frequency assignments in conformity with the
Regions 1 and 3 Plan or with the Regions 1 and 3 List or into new or modified
assignments in the Regions 1 and 3 List

Does not apply to the Region 2 Plan.

2 Limits to the change in the overall equivalent protection margin for frequency
assignments in conformity with the Region 2 plan

With respect to § 4.2.3 c) of Article 4, an administration in Region 2 is considered as being
affected if the overall equivalent protection margin28 corresponding to a test point of its entry in
the Region 2 Plan, including the cumulative effect of any previous modification to that Plan or
any previous agreement, falls more than 0.25 dB below 0 dB, or, if already negative, more
than 0.25 dB below the value resulting from:
– the Region 2 Plan as established by the 1983 Conference; or
– a modification of the assignment in accordance with this Appendix; or
– a new entry in the Region 2 Plan under Article 4; or
– any agreement reached in accordance with this Appendix. (WRC-03)

An MSPACE analysis was performed utilizing the Region 2 BSS Plan as contained in IFIC 2733.
The results of the analysis are contained in Annex 1 to this Appendix. Note that networks that
were found to be affected, but have since expired, have not been included in the table.

28
For the definition of the overall equivalent protection margin, see § 1.11 of Annex 5.

Page A1-1 of A1-6

As shown, there are three adjacent Region 2 BSS networks filed. The results are discussed below
for each of the affected networks:

• The UK’s INTELSAT KU-EXT 304.5 network at 55.5° W.L. is deemed to be affected.
The USA and UK have an existing coordination agreement that encompasses their
respective operations at the nominal 61.5° W.L. and 55.5° W.L. orbital locations.

• Holland’s NSS-BSS 58W at 58° W.L. is deemed to be affected. This network includes a
beam that has partial CONUS coverage. This network/beam needs to be coordinated with
USA networks at 61.5° W.L. before it can be implemented. This network expires in July
2018.

• The UK’s USAT-S5 MOD-A network at 66.3° W.L. is deemed to be affected. This
network needs to be coordinated with USA networks at 61.5° W.L. before it can be
implemented. This network expires in October 2017.

3 Limits to the change in the power flux-density to protect the broadcasting-
satellite service in Regions 1 and 2 in the band 12.2-12.5 GHz and in Region 3 in
the band 12.5-12.7 GHz

With respect to § 4.2.3 a), 4.2.3 b) or 4.2.3 f) of Article 4, as appropriate, an administration in
Region 1 or 3 is considered as being affected if the proposed modification to the Region 2 Plan
would result in exceeding the following power flux-density values, at any test point in the service
area of its overlapping frequency assignments:

–147 dB(W/(m2 · 27 MHz)) for 0° ≤ θ < 0.23°
2
–135.7 + 17.74 log θ dB(W/(m · 27 MHz)) for 0.23° ≤ θ < 2.0°
2 2
–136.7 + 1.66 θ dB(W/(m · 27 MHz)) for 2.0° ≤ θ < 3.59°
2
–129.2 + 25 log θ dB(W/(m · 27 MHz)) for 3.59° ≤ θ <10.57°
2
–103.6 dB(W/(m · 27 MHz)) for 10.57° ≤ θ

where θ is the minimum geocentric orbital separation in degrees between the wanted and
interfering space stations, taking into account the respective East-West station-keeping
accuracies. (WRC-03)

The GIMS PFD tool was used to assess compliance with this Section. Using the antenna gain
contours and power levels of the beams the GIMS PFD tool showed that no administrations are
affected. Therefore the ECHOSTAR-18 satellite network is compliant with this Section.

Page A1-2 of A1-6

4 Limits to the power flux-density to protect the terrestrial services of other
administrations29, 30, 31

With respect to § 4.2.3 d) of Article 4, an administration in Region 1, 2 or 3 is considered as
being affected if the consequence of the proposed modification to an existing assignment in the
Region 2 Plan is to increase the power flux-density arriving on any part of the territory of that
administration by more than 0.25 dB over that resulting from that frequency assignment in the
Region 2 Plan at the time of entry into force of the Final Acts of the 1985 Conference. The same
administration is considered as not being affected if the value of the power flux-density
anywhere in its territory does not exceed the limits expressed below.

With respect to § 4.1.1 d) or § 4.2.3 d) of Article 4, an administration in Region 1, 2 or 3 is
considered as being affected if the proposed new assignment in the Regions 1 and 3 List, or if
the proposed new frequency assignment in the Region 2 Plan, would result in exceeding a power
flux-density, for any angle of arrival, at any point on its territory, of:

–148 dB(W/(m2 ⋅ 4 kHz)) for θ ≤ 5°

–148 + 0.5 (θ – 5) dB(W(m2 ⋅ 4 kHz) for 5° < θ ≤ 25°

–138 dB(W/(m2 ⋅ 4 kHz)) for 25° < θ ≤ 90°

where θ represents the angle of arrival. (WRC-03)

The GIMS PFD tool was used to assess compliance with this Section. Using the antenna gain
contours and power levels of the beams, the GIMS PFD tool showed that no administrations are
affected. Therefore the ECHOSTAR-18 satellite network is compliant with this Section.

29
See § 3.18 of Annex 5.
30
In the band 12.5-12.7 GHz in Region 1, these limits are applicable only to the territory of administrations
mentioned in Nos. 5.494 and 5.496.
31
See Resolution 34.

Page A1-3 of A1-6

5 (Not used.)

6 Limits to the change in the power flux-density of assignments in the Regions 1
and 3 Plan or List to protect the fixed-satellite service (space-to-earth) in the
band 11.7-12.2 GHz32 in Region 2 or in the band 12.2-12.5 GHz in Region 3, and
of assignments in the Region 2 plan to protect the fixed-satellite service (space-
to-earth) in the band 12.5-12.7 GHz in Region 1 and in the band 12.2-12.7 GHz
in Region 3

With respect to § 4.2.3 e), an administration is considered as being affected if the proposed
modification to the Region 2 Plan would result in an increase in the power flux-density over any
portion of the service area of its overlapping frequency assignments in the fixed-satellite service
in Region 1 or 3 of 0.25 dB or more above that resulting from the frequency assignments in the
Region 2 Plan at the time of entry into force of the Final Acts of the 1985 Conference.

With respect to § 4.1.1 e) or 4.2.3 e) of Article 4, an administration is considered as not being
affected if the proposed new or modified assignment in the Regions 1 and 3 List, or if a proposed
modification to the Region 2 Plan, gives a power flux-density anywhere over any portion of the
service area of its overlapping frequency assignments in the fixed-satellite service in Region 1, 2
or 3 of less than:

–186.5 dB(W/(m2 · 40 kHz)) for 0° ≤ θ < 0.054°

–164.0 + 17.74 log θ dB(W/(m2 · 40 kHz)) for 0.054° ≤ θ < 2.0°

–165.0 + 1.66 θ2 dB(W/(m2 · 40 kHz)) for 2.0° ≤ θ < 3.59°

–157.5 + 25 log θ dB(W/(m2 · 40 kHz)) for 3.59°≤ θ < 10.57°

–131.9 dB(W/(m2 · 40 kHz)) for 10.57° ≤ θ

where θ is the minimum geocentric orbital separation in degrees between the wanted and
interfering space stations, taking into account the respective East-West station-keeping
accuracies.

Using the transmission parameters of the ECHOSTAR-18 satellite, the ITU’s GIBC software tool
was used to assess compliance with this Section. Several networks were deemed to be affected as
listed in the table immediately below. DISH will coordinate with the administrations / operators
of these networks as appropriate.

32
Including assignments operating under No. 5.485.

Page A1-4 of A1-6

GIBC Results (Annex 1, Section 6):

Orbital
ADM Position Network
(°W)
CAN 129.0 CAN-BSS7 TT&C
UK 105.5 USAT-S1 MOD-A TT&C
UK 86.45 IOMSAT-S21-TT&C
MEX 77.0 QUETZSAT-77 TTC
B 44.9 B-SAT-3A-2 TT&C
B 61.0 B-SAT-Q

7 Limits to the change in equivalent noise temperature to protect the fixed-
satellite service (earth-to-space) in Region 1 from modifications to the Region 2
plan in the band 12.5-12.7 GHz

With respect to § 4.2.3 e) of Article 4, an administration of Region 1 is considered as being
affected if the proposed modification to the Region 2 Plan would result in:
– the value of ∆T/T resulting from the proposed modification is greater than the value of
∆T/T resulting from the assignment in the Region 2 Plan as of the date of entry into force of
the Final Acts of the 1985 Conference; and
– the value of ∆T/T resulting from the proposed modification exceeds 6%,
using the method of Appendix 8 (Case II). (WRC-03)

From a review of the available ITU space network databases there are no assignments registered
in the Earth-to-space direction in the frequency band 12.5-12.7 GHz. Therefore no Region 1
space stations can be affected and hence the ECHOSTAR-18 satellite network is compliant with
this Section.

Page A1-5 of A1-6

Annex 1 to Appendix 1 to Technical Annex

ECHOSTAR-18

MSPACE Results

Orbital Max. OEPM
ADM Position Network Degradation
(° W) (dB)
UK 55.5 INTELSAT KUEXT 304.5 0.492
HOL 58.0 NSS-BSS 58W 0.341
UK 66.3 USAT-S5 MOD-A 1.294

Page A1-6 of A1-6

APPENDIX 2 TO ATTACHMENT A

Analysis of ANNEX 1 of Appendix 30A

1 (SUP - WRC-2000)

2 (SUP - WRC-2000)

3 Limits to the change in the overall equivalent protection margin with respect to
frequency assignments in conformity with the Region 2 feeder-link
plan33 (WRC-2000)

With respect to the modification to the Region 2 feeder-link Plan and when it is necessary under
this Appendix to seek the agreement of any other administration of Region 2, except in cases
covered by Resolution 42 (Rev.WRC-03), an administration is considered as being affected if the
overall equivalent protection margin34 corresponding to a test point of its entry in that Plan,
including the cumulative effect of any previous modification to that Plan or any previous
agreement, falls more than 0.25 dB below 0 dB, or, if already negative, more than 0.25 dB below
the value resulting from:
– the feeder-link Plan as established by the 1983 Conference; or
– a modification of the assignment in accordance with this Appendix; or
– a new entry in the feeder-link Plan under Article 4; or
– any agreement reached in accordance with this Appendix except for Resolution 42
(Rev.WRC-03). (WRC-03)

See the results described under Section 2 of the Appendix 30 Annex 1 Analysis.

33
With respect to § 3 the limit specified relates to the overall equivalent protection margin calculated in
accordance with § 1.12 of Annex 3.
34
For the definition of the overall equivalent protection margin, see § 1.11 of Annex 5 to Appendix 30.

Page A2-1 of A2-2

4 Limits to the interference into frequency assignments in conformity with the
Regions 1 and 3 feeder-link Plan or with the Regions 1 and 3 feeder-link List or
proposed new or modified assignments in the Regions 1 and 3 feeder-link
list (WRC-03)

Does not apply to the Region 2 Plan.

5 Limits applicable to protect a frequency assignment in the bands 17.3-18.1 GHz
(Regions 1 and 3) and 17.3-17.8 GHz (Region 2) to a receiving space station in
the fixed-satellite service (earth-to-space)

An administration in Region 1 or 3 is considered as being affected by a proposed modification in
Region 2, with respect to § 4.2.2 a) or 4.2.2 b) of Article 4, or an administration in Region 2 is
considered as being affected by a proposed new or modified assignment in the Regions 1 and 3
feeder-link List, with respect to § 4.1.1 c) of Article 4, when the power flux-density arriving at
the receiving space station of a broadcasting-satellite feeder-link would cause an increase in the
noise temperature of the feeder-link space station which exceeds the threshold value of ∆T/T
corresponding to 6%, where ∆T/T is calculated in accordance with the method given in
Appendix 8, except that the maximum power densities per hertz averaged over the worst 1 MHz
are replaced by power densities per hertz averaged over the necessary bandwidth of the feeder-
link carriers. (WRC-03)

The analysis shows that there are no affected Region 1 or Region 3 networks.

6 Limits applicable to protect a frequency assignment in the band 17.8- 18.1 GHz
(Region 2) to a receiving feeder-link space station in the fixed-satellite service
(earth-to-space) (WRC-03)

Does not apply to the Region 2 Plan.

______________________

Page A2-2 of A2-2

Document Created: 2010-01-01 00:00:00
Document Modified: 2010-01-01 00:00:00

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