Attachment G12 Engineering S

This document pretains to SAT-AMD-20100514-00102 for Amended Filing on a Satellite Space Stations filing.

IBFS_SATAMD2010051400102_817317

Engineering Statement PanAmSat Licensee Corp. (“PanAmSat”) proposes to operate its Galaxy 12 spacecraft from 133° W.L. From this orbital location, Galaxy 12 will utilize the 5925 – 6425 MHz and 3700 – 4200 MHz frequency bands. Galaxy 12 is currently authorized to operate from 122.9º W.L. (see FCC File No.: SAT-MOD-20080630-00133). PanAmSat has a pending application proposing to operate the spacecraft from 129º W.L. (see FCC File No.: SAT- MOD-20100120-00013). PanAmSat now proposes to deploy Galaxy 12 to 133º W.L. Galaxy 12 would replace the existing Galaxy 15 spacecraft which recently experienced an anomaly. To take the impact of this proposed change in orbital location into account, this engineering statement updates, as appropriate, the following technical information that PanAmSat had previously submitted in its SAT-AMD- 20021107-0023, SAT-MOD-20050815-00159, SAT-MOD-20051206- 00262, SAT-MOD-20080630-00133 and SAT-MOD-20100120-00013 filings: 1) frequency plan, 2) gain contours, (3) power flux density levels, (4) link budget and interference analysis and (5) orbital debris mitigation plan. Frequency Plan The Galaxy 12 frequency and beam switching plan are provided in Exhibits 1A and 1B. From the 133° W.L. orbital location, the primary channel configuration (as designated in Exhibit 1A) will be implemented on Galaxy 12. Gain Contours The coverage patterns for Galaxy 12 operating from the proposed 133° W.L. orbital location are provided in Exhibits 2A through 2J. Power Flux Density (“PFD”) Levels The power flux density limits for space stations are specified in section 25.208 of the Commission’s rules. In the 3700 – 4200 MHz band, the maximum PFD level at the Earth’s surface produced by Galaxy 12 was calculated for a 36 MHz digital carrier (having an occupied bandwidth of 30.133 MHz) and a 36 MHz analog TV/FM carrier, which typically generate the highest PFD levels. The power flux density level for the Galaxy 12 telemetry carriers was also calculated. The results are provided in Exhibit 3 and show that the downlink power flux density levels of the Galaxy 12 Page 1 of 20

carriers do not exceed limits specified in section 25.208 of the Commission’s rules. Link Budget and Interference Analysis Link analysis for Galaxy 12 was conducted for a number of representative carriers. For the analysis, it was assumed that the nearest satellites to Galaxy 12 were a hypothetical satellite operating from 131° W.L. and a hypothetical satellite operating from 135° W.L. The hypothetical satellites were assumed to have the same operational parameters as Galaxy 12. At C-band, the uplink power density at the input of an earth station antenna transmitting to each of the hypothetical satellites was assumed to be -38.7 dBW/Hz, the maximum level specified in section 25.212(d) of the Commission’s rules for digital C-band carriers. Other assumptions made for the link budget analysis were as follows: a) In the plane of the geostationary satellite orbit, all transmitting and receiving earth station antennas have off-axis co-polar gains that are compliant with the limits specified in section 25.209(a)(1) of the FCC’s rules. b) All transmitting and receiving earth stations have a cross-polarization isolation value of at least 30 dB within their main beam lobe. c) Degradation due to rain was not considered, given that rain (attenuation) effects are insignificant at C-band. The impact of the TV/FM carriers from the adjacent satellites at 131° W.L. and 135° W.L on the transmissions of Galaxy 12 was not considered due to the fact that TV/FM carriers are known to be high-density carriers with most of the energy contained within the near vicinity of the carrier center frequency. Operation of sensitive narrow-band carriers is typically precluded within these high power density areas of the TV/FM carrier. Accordingly, placement and operation of TV/FM carriers are normally achieved through internal coordination and/or coordination discussions with the adjacent satellite operator, whichever may be the case, rather than through C/I calculations – since the results of such calculations would show that narrow-band carriers typically could not operate on a co-frequency basis with TV/FM carriers. The results of the C-band analyses are shown in Exhibit 4 and demonstrate that operation of the Galaxy 12 satellite from 133º W.L. would permit the intended services to achieve their respective performance objectives while Page 2 of 20

maintaining sufficient link margin. Additionally, the power density levels of the carriers listed in Exhibit 4 comply with the FCC limits contained in section 25.212(d) of the Commission’s rules. Adjacent Satellite Link Analysis The impact of the Galaxy 12 emissions on the transmissions of adjacent satellites was not analyzed. This is due to PanAmSat’s intent to limit the power levels of Galaxy 12 transmissions to those levels contained in section 25.212(d) of the FCC’s rules. In those cases where PanAmSat may need to transmit carriers with power levels in excess of those in 25.212(d), it will coordinate its emissions so as to limit the level interference that is mutually caused and received by Galaxy 12 and adjacent satellites operating from 131º W.L and/or 135º W.L. Schedule S Submission PanAmSat is providing a Schedule S with its application. The Schedule S contains only: (1) those Galaxy 12 data items that have changed from those that were shown in the Schedule S for SAT-MOD-20080630-00133; and (2) data items whose inclusion was required in order for the software application to function properly. Orbital Debris Mitigation Plan PanAmSat 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. Orbital Debris Mitigation Plan: Spacecraft Hardware Design The spacecraft is designed such that no debris will be released during normal operations. PanAmSat 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. Orbital Debris Mitigation Plan: Minimizing Accidental Explosions PanAmSat has assessed the probability of accidental explosions during and after completion of mission operations. The spacecraft is designed in a Page 3 of 20

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, PanAmSat will, with the exception of the oxidizer tanks, ensure the removal of all stored energy on the spacecraft by depleting all propellant tanks, venting all pressurized systems, and turning off all active units. As explained in PanAmSat’s filing SAT-MOD-20080630-00133, upon completion of the Galaxy 12 orbit raising maneuver, the oxidizer tanks are isolated from both the Liquid Apogee Motor (“LAE”) and Dual Mode Thrusters (“DMTs”). Typically, some residual oxidizer remains in the tank following the isolation. It is anticipated that less than 11 kilograms of oxidizer is carried throughout the mission (less than 2.5% fill fraction). Accordingly, PanAmSat requests waiver of the provisions of section 25.283(c) of the Commission’s rules. Venting both fuel and pressurant through thrusters at the end of the mission minimizes the risk of reaction between fuel and oxidizer. Also, oxidizer remaining in the propellant manifolds between the pyro valves and the LAE/DMT thrusters will be expelled at the end of life by performing an engine pulsing maneuver. The risk of an explosive reaction is further reduced by isolating the oxidizer tanks from the remainder of the propulsion system. In addition, at the worst case end-of-life temperature, with a 2.5% fill fraction, the pressure in the oxidizer tank will not exceed its burst pressure. Accordingly, PanAmSat requests that the waiver of Section 25.283(c) of the Commission’s rules previously granted to the Galaxy 12 spacecraft for operation at 122.9º W.L. continue to apply at the 133º W.L. location. Orbital Debris Mitigation Plan: Safe Flight Profiles PanAmSat 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. Taking into account that Galaxy 15 has moved away from 133º W.L., it is concluded that Galaxy 12 will not be located at the same orbital location as another satellite or at an orbital location that has an overlapping station- keeping volume with another satellite. Page 4 of 20

PanAmSat is not aware of any other FCC licensed system, or any other system applied for and under consideration by the FCC, having an overlapping station-keeping volume with Galaxy 12. PanAmSat is also not aware of any space network with an overlapping station-keeping volume with Galaxy 12 that is the subject of an ITU filing and that is either in orbit or progressing towards launch. Orbital Debris Mitigation Plan: Post Mission Disposal At the end of the mission, PanAmSat intends to dispose of the spacecraft by moving it to a minimum altitude of 300 kilometers above the geostationary arc. This exceeds the minimum altitude established by the IADC formula. PanAmSat has reserved 6.8 kilograms of fuel for this purpose. The reserved fuel figure will be provided for in the propellant budget. To calculate this figure, the “rocket equation” was used, taking into account the expected mass of the satellite at the end of life and the required delta-velocity to achieve the desired orbit. PanAmSat has assessed the fuel gauging uncertainty and has provided an adequate margin of fuel reserve to address the assessed uncertainty in remaining propellant. In calculating the disposal orbit, PanAmSat has used simplifying assumptions as permitted under the Commission’s Orbital Debris Report and Order. For reference, the effective area to mass ratios (Cr*A/M) of the Galaxy 12 spacecraft is 0.03 m2/kg, resulting in a minimum perigee disposal altitude under the IADC formula of at most 238.2 kilometers above the geostationary arc, which is lower than the 300 kilometer above geostationary disposal altitude specified by PanAmSat in this filing. Accordingly, the Galaxy 12 planned disposal orbit complies with the FCC’s rules. Page 5 of 20

Certification Statement I hereby certify that I am a technically qualified person and am familiar with Part 25 of the Commission’s Rules and Regulations. 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/ Jose Albuquerque May 14, 2010 Jose Albuquerque Date Intelsat Corporation Senior Director, Regulatory Engineering Page 6 of 20

Exhibit 1A: Frequency Plan Page 7 of 20

Exhibit 1B: Frequency Plan (continued) Uplink Downlink Uplink Uplink Center Downlink Downlink Center Channel Channel Transponder Beam Uplink Frequency Transponder Beam Downlink Frequency Bandwidth Gain Designation Name Polarization (MHz) Designation Name Polarization (MHz) (MHz) (dB) 1C CONUS Vertical 5945 1C CONUS Horizontal 3720 36 132.8 3C CONUS Vertical 5985 3C CONUS Horizontal 3760 36 132.8 5C CONUS Vertical 6025 5C CONUS Horizontal 3800 36 132.8 7C CONUS Vertical 6065 7C CONUS Horizontal 3840 36 132.8 9C CONUS Vertical 6105 9C CONUS Horizontal 3880 36 132.8 11C CONUS Vertical 6145 11C CONUS Horizontal 3920 36 132.8 13C CONUS Vertical 6185 13C CONUS Horizontal 3960 36 132.8 15C CONUS Vertical 6225 15C CONUS Horizontal 4000 36 132.8 17C CONUS Vertical 6265 17C CONUS Horizontal 4040 36 132.8 19C CONUS Vertical 6305 19C CONUS Horizontal 4080 36 132.8 21C CONUS Vertical 6345 21C CONUS Horizontal 4120 36 132.8 23C CONUS Vertical 6385 23C CONUS Horizontal 4160 36 132.8 2C CONUS Horizontal 5965 2C CONUS Vertical 3740 36 132.8 4C CONUS Horizontal 6005 4C CONUS Vertical 3780 36 132.8 6C CONUS Horizontal 6045 6C CONUS Vertical 3820 36 132.8 8C CONUS Horizontal 6085 8C CONUS Vertical 3860 36 132.8 10C CONUS Horizontal 6125 10C CONUS Vertical 3900 36 132.8 12C CONUS Horizontal 6165 12C CONUS Vertical 3940 36 132.8 14C CONUS Horizontal 6205 14C CONUS Vertical 3980 36 132.8 16C CONUS Horizontal 6245 16C CONUS Vertical 4020 36 132.8 18C CONUS Horizontal 6285 18C CONUS Vertical 4060 36 132.8 20C CONUS Horizontal 6325 20C CONUS Vertical 4100 36 132.8 22C CONUS Horizontal 6365 22C CONUS Vertical 4140 36 132.8 24C CONUS Horizontal 6405 24C CONUS Vertical 4180 36 132.8 Command 1 CONUS Vertical 6424.5 1.0 Command 2 GLOBAL Right Hand Circular 6424.5 1.0 Command 3 GLOBAL Right Hand Circular 6424.5 1.0 Telemetry 1 CONUS Horizontal 4198.0 0.5 Telemetry 2 CONUS Horizontal 4199.875 0.5 Telemetry 3 GLOBAL Left Hand Circular 4198.0 0.5 Telemetry 4 GLOBAL Left Hand Circular 4199.875 0.5 Telemetry 5 GLOBAL Left Hand Circular 4198.0 0.5 Telemetry 6 GLOBAL Left Hand Circular 4199.875 0.5 Page 8 of 20

Exhibit 2A: C-Band Uplink Beam Beam Polarization: Horizontal Antenna Gain @ Beam Peak: 30.7 dBi Beam Peak G/T: 3.5 dB/K Saturated Flux Density @ Beam Peak G/T: -75.5 to -111.5 dBW/m2 [Schedule S Beam ID: CHUP] -2 -4 -6 -8 -10 -15 -20 Page 9 of 20

Exhibit 2B: C-Band Uplink Beam Beam Polarization: Vertical Antenna Gain @ Beam Peak: 30.7 dBi Beam Peak G/T: 3.5 dB/K Saturated Flux Density @ Beam Peak G/T: -75.5 to -111.5 dBW/m2 [Schedule S Beam ID: CVUP] -2 -4 -6 -8 -10 -15 -20 -20 Page 10 of 20

Exhibit 2C: C-Band Downlink Beam Beam Polarization: Horizontal Antenna Gain @ Beam Peak: 29.5 dBi Beam EIRP: 44.2 dBW [Schedule S Beam ID: CHDN] -2 -4 -6 -8 -10 -15 -20 Page 11 of 20

Exhibit 2D: C-Band Downlink Beam Beam Polarization: Vertical Antenna Gain @ Beam Peak: 29.5 dBi Beam EIRP: 44.2 dBW [Schedule S Beam ID: CVDN] -2 -4 -6 -8 -10 -15 -20 Page 12 of 20

Exhibit 2E: C-Band Command Beam (Omni Antenna) Beam Polarization: Right Hand Circular Antenna Gain @ Beam Peak: 2.1 dBi Beam Peak G/T: -25.4 dB/K Command Threshold Flux Density @ Beam Peak: -87.5 dBW/m2 [Schedule S Beam ID: OMNC] Relative Gain Contour Levels Shown: -0.01, -0.02 and -0.03 dB Page 13 of 20

Exhibit 2F: C-Band Command Beam (WCA Antennas) Beam Polarization: Right Hand Circular Antenna Gain @ Beam Peak: 13.1 dBi Beam Peak G/T: -14.4 dB/K Command Threshold Flux Density @ Beam Peak: -94 dBW/m2 [Schedule S Beam ID: WCAC] Relative Gain Contour Levels Shown: -0.1, -0.2, -0.3, -0.4, -0.5, -0.6 and -0.7 dB Page 14 of 20

Exhibit 2G: C-Band Command Beam (Communication Antenna) Beam Polarization: Vertical Antenna Gain @ Beam Peak: 30.7 dBi Beam Peak G/T: -4.5 dB/K Command Threshold Flux Density @ Beam Peak: -114.7 dBW/m2 [Schedule S Beam ID: CMDC] -2 -4 -6 -8 -10 -15 -20 -20 Page 15 of 20

Exhibit 2H: C-Band Telemetry Beam (Omni Antenna) Beam Polarization: Left Hand Circular Antenna Gain @ Beam Peak: 2.1 dBi Beam Peak EIRP: 5.8 dBW [Schedule S Beam ID: OMNT] Relative Gain Contour Levels Shown: -0.01, -0.02 and -0.03 dB Page 16 of 20

Exhibit 2I: C-Band Telemetry Beam (WCA Antennas) Beam Polarization: Left Hand Circular Antenna Gain @ Beam Peak: 13.1 dBi Beam Peak EIRP: 4.8 dBW [Schedule S Beam ID: WCAT] Relative Gain Contour Levels Shown: -0.1, -0.2, -0.3, -0.4, -0.5, -0.6 and -0.7 dB Page 17 of 20

Exhibit 2J: C-Band Telemetry Beam (Communication Antenna) Beam Polarization: Horizontal Antenna Gain @ Beam Peak: 29.5 dBi Beam Peak EIRP: 20 dBW [Schedule S Beam ID: TLMT] -2 -4 -6 -8 -10 -15 -20 Page 18 of 20

EXHIBIT 3: POWER FLUX DENSITY CALCULATIONS Digital Carrier (36M0G7W) Elevation Angle (degrees) 0 5 10 15 20 25 90 Assumed EIRP (dBW) 44.2 44.2 44.2 44.2 44.2 44.2 44.2 Occupied Bandwidth (kHz) 30133 30133 30133 30133 30133 30133 30133 Spreading loss (dB/m2) 163.4 163.3 163.2 163.0 162.9 162.8 162.1 Maximum PFD (dB/m2/4kHz) -158 -157.8 -157.8 -157.6 -157.5 -157.4 -156.6 PFD Limit (dB/m2/4kHz) -152 -152 -149.5 -147 -144.5 -142 -142 Margin (dB) 6.0 5.8 8.3 10.6 13.0 15.4 14.6 Analog TV Carrier (36M0F3F) Elevation Angle (degrees) 0 5 10 15 20 25 90 Assumed EIRP (dBW) 41.3* 41.3* *43.7 44.2 44.2 44.2 44.2 Occupied Bandwidth (kHz) 4000 4000 4000 4000 4000 4000 4000 Spreading loss (dB/m2) 163.4 163.3 163.2 163.0 162.9 162.8 162.1 Maximum PFD (dB/m2/4kHz) -152.1 -152.0 -149.5 -148.8 -148.7 -148.6 -147.9 PFD Limit (dB/m2/4kHz) -152 -152 -149.5 -147 -144.5 -142 -142 Margin (dB) 0.1 0.0 0.0 1.8 4.2 6.6 5.9 * This is the maximum allowable EIRP level at the specified elevation angle. The actual EIRP level of the beam at this particular elevation angle will be made to be equal to or lower than the value listed in the table through reduction in the output power of the channel and/or restriction on the movement/placement of the beam. Telemetry (OMNI Antenna) Elevation Angle (degrees) 0 5 10 15 20 25 90 Assumed EIRP (dBW) 5.8 5.8 5.8 5.8 5.8 5.8 5.8 Occupied Bandwidth (kHz) 250 250 250 250 250 250 250 Spreading loss (dB/m2) 163.4 163.3 163.2 163.0 162.9 162.8 162.1 Maximum PFD (dB/m2/4kHz) -175.6 -175.5 -175.4 -175.2 -175.1 -175.0 -174.2 PFD Limit (dB/m2/4kHz) -152 -152 -149.5 -147 -144.5 -142 -142 Margin (dB) 23.6 23.5 25.9 28.2 30.6 33.0 32.2 Telemetry (Wide Coverage Antenna) Elevation Angle (degrees) 0 5 10 15 20 25 90 Assumed EIRP (dBW) 4.8 4.8 4.8 4.8 4.8 4.8 4.8 Occupied Bandwidth (kHz) 250 250 250 250 250 250 250 Spreading loss (dB/m2) 163.4 163.3 163.2 163.0 162.9 162.8 162.1 Maximum PFD (dB/m2/4kHz) -176.6 -176.5 -176.4 -176.2 -176.1 -176.0 -175.2 PFD Limit (dB/m2/4kHz) -152 -152 -149.5 -147 -144.5 -142 -142 Margin (dB) 24.6 24.5 26.9 29.2 31.6 34.0 33.2 Telemetry (Communication Antenna) Elevation Angle (degrees) 0 5 10 15 20 25 90 Assumed EIRP (dBW) 20 20 20 20 20 20 20 Occupied Bandwidth (kHz) 250 250 250 250 250 250 250 Spreading loss (dB/m2) 163.4 163.3 163.2 163.0 162.9 162.8 162.1 Maximum PFD (dB/m2/4kHz) -161.4 -161.3 -161.2 -161.0 -160.9 -160.8 -160.0 PFD Limit (dB/m2/4kHz) -152 -152 -149.5 -147 -144.5 -142 -142 Margin (dB) 9.4 9.3 11.7 14.0 16.4 18.8 18.0 Page 19 of 20

EXHIBIT 4: GALAXY 12 LINK BUDGETS UPLINK BEAM INFORMATION Uplink Beam Name CONUS CONUS CONUS CONUS Uplink Frequency (GHz) 6.175 6.175 6.175 6.175 Uplink Beam Polarization LINEAR LINEAR LINEAR LINEAR Uplink Relative Contour Level (dB) -4.0 -4.0 -4.0 -4.0 Uplink Contour G/T (dB/K) -.5 -.5 -.5 -.5 Uplink SFD (dBW/m2) -82.5 -89.5 -91.5 -91.5 DOWNLINK BEAM INFORMATION Downlink Beam Name CONUS CONUS CONUS CONUS Downlink Frequency (GHz) 3.950 3.950 3.950 3.950 Downlink Beam Polarization LINEAR LINEAR LINEAR LINEAR Downlink Relative Contour Level (dB) -4.0 -4.0 -4.0 -4.0 Downlink Contour EIRP (dBW) 40.2 40.2 40.2 40.2 ADJACENT SATELLITE 1 Satellite 1 Orbital Location 131.0W 131.0W 131.0W 131.0W Uplink Power Density (dBW/Hz) -38.7 -38.7 -38.7 -38.7 Uplink Polarization Advantage (dB) 0.0 0.0 0.0 0.0 Downlink EIRP Density (dBW/Hz) -34.6 -34.6 -34.6 -34.6 Downlink Polarization Advantage (dB) 0.0 0.0 0.0 0.0 ADJACENT SATELLITE 2 Satellite 1 Orbital Location 135.0W 135.0W 135.0W 135.0W Uplink Power Density (dBW/Hz) -38.7 -38.7 -38.7 -38.7 Uplink Polarization Advantage (dB) 0.0 0.0 0.0 0.0 Downlink EIRP Density (dBW/Hz) -34.6 -34.6 -34.6 -34.6 Downlink Polarization Advantage (dB) 0.0 0.0 0.0 0.0 CARRIER INFORMATION Carrier ID 36M0F3F 36M0G7W 10M3G7W 100KG7W Carrier Modulation TV/FM QPSK QPSK QPSK Peak to Peak Bandwidth of EDS (MHz) 4 N/A N/A N/A Information Rate(kbps) N/A 24575 6000 64 Code Rate N/A 1/2x188/204 1/2x188/204 1/2x239/256 Occupied Bandwidth(kHz) 36000 30133 6771.1 75.4 Allocated Bandwidth(kHz) 36000 36000 10300 100 Minimum C/N, Clear Sky (dB) 10.0 3.4 3.9 3.0 UPLINK EARTH STATION Earth Station Diameter (meters) 13.0 6.1 6.1 6.1 Earth Station Gain (dBi) 56.4 49.4 49.4 49.4 Earth Station Elevation Angle 20 20 20 20 DOWNLINK EARTH STATION Earth Station Diameter (meters) 3.5 2.4 3.0 3.0 Earth Station Gain (dBi) 41.1 38.1 39.7 39.7 Earth Station G/T (dB/K) 21.0 17.4 19.2 19.2 Earth Station Elevation Angle 20 20 20 20 LINK FADE TYPE Clear Sky Clear Sky Clear Sky Clear Sky UPLINK PERFORMANCE Uplink Earth Station EIRP (dBW) 80.4 73.4 62.4 42.0 Uplink Path Loss, Clear Sky (dB) -200.2 -200.2 -200.2 -200.2 Uplink Rain Attenuation 0.0 0.0 0.0 0.0 Satellite G/T(dB/K) -.5 -.5 -.5 -.5 Boltzman Constant(dBW/K-Hz) 228.6 228.6 228.6 228.6 Carrier Noise Bandwidth (dB-Hz) -75.6 -74.8 -68.3 -48.8 Uplink C/N(dB) 32.7 26.5 22.0 21.1 DOWNLINK PERFORMANCE Downlink EIRP per Carrier (dBW) 40.2 40.2 32.7 12.3 Antenna Pointing Error (dB) -.5 -.5 -.5 -.5 Downlink Path Loss, Clear Sky (dB) -196.3 -196.3 -196.3 -196.3 Downlink Rain Attenuation 0.0 0.0 0.0 0.0 Earth Station G/T (dB/K) 21.0 17.4 19.2 19.2 Boltzman Constant(dBW / K - Hz) 228.6 228.6 228.6 228.6 Carrier Noise Bandwidth (dB-Hz) -75.6 -74.8 -68.3 -48.8 Downlink C / N(dB) 17.4 14.6 15.3 14.5 COMPOSITE LINK PERFORMANCE C/N Uplink (dB) 32.7 26.5 22.0 21.1 C/N Downlink (dB) 17.4 14.6 15.3 14.5 C/I Intermodulation (dB) N/A N/A 20.5 19.6 C/I Uplink Co-Channel (dB)* 24.0 24.0 25.4 25.1 C/I Downlink Co-Channel (dB)* 24.0 24.0 25.4 25.1 C/I Uplink Adjacent Satellite 1 (dB) 21.5 15.3 10.8 9.9 C/I Downlink Adjacent Satellite 1 (dB) 15.6 6.2 10.2 9.3 C/I Uplink Adjacent Satellite 2 (dB) 21.5 15.3 10.8 9.9 C/I Downlink Adjacent Satellite 2 (dB) 20.3 15.6 18.9 18.0 C/(N+I) Composite (dB) 11.1 4.3 4.9 4.0 Required System Margin (dB) -1.0 -1.0 -1.0 -1.0 Net C/(N+I) Composite (dB) 10.1 3.3 3.9 3.0 Minimum Required C/N (dB) -10.0 -3.4 -3.9 -3.0 Excess Link Margin (dB) .1 0.0 0.0 0.0 Number of Carriers 1 1.0 2.5 277.2 CARRIER DENSITY LEVELS Uplink Power Density (dBW/Hz) -42.0 -50.8 -55.3 -56.2 Downlink EIRP Density At Beam Peak (dBW/Hz) -21.8 -30.6 -31.6 -32.5 Page 20 of 20


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