Attachment EngineeringStatement

This document pretains to SAT-MOD-20170131-00010 for Modification on a Satellite Space Stations filing.

IBFS_SATMOD2017013100010_1172431

Engineering Statement 1 Introduction Intelsat License LLC (“Intelsat”) seeks authority in this application to operate the satellite designated as Intelsat 903 at 31.5° W.L. The characteristics of the Intelsat 903 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 903 are the same as those described in SAT-MOD-20011221-00139. 2 Spacecraft Overview Intelsat 903 is capable of operating in the C-band and Ku-band frequencies listed below. Direction Frequency 5850 – 6425 MHz Uplink 14000 – 14500 MHz 3625 – 4200 MHz Downlink 10950 – 11200 MHz 11450 – 11700 MHz The spacecraft provides the following coverage: Beam Coverage Central West South America West Hemi North and South America East Hemi Africa and Europe Northwest Northern United States Southwest Southern South America Middle West Central America and Caribbean Southeast Sub-Saharan Africa Northeast Europe and Greenland Global Global Steerable Spot Beams Global Page 1 of 13

2.1 Spacecraft Characteristics Intelsat 903 is a Space Systems Loral FS-1300HL three-axis stabilized type spacecraft that has a rectangular outer body structure. Intelsat 903 utilizes two deployable solar array wings and a number of deployable and non-deployable antennas. The Intelsat 903 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 903 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 903 provides active communication channels at C-band frequencies, each having a bandwidth of 36 MHz or 72 MHz, and Ku-band frequencies each having a bandwidth of 36 MHz, 72 MHz, or 77 MHz. The Intelsat 903 frequencies, polarization, and channel plan are provided in the Schedule S. An explanation of how uplink frequency bands are connected to downlink frequency bands is provided in Exhibit 5. The Schedule S operating bands table includes the frequency band 10950-11700 MHz, which encompasses two bands on Intelsat 903: 10950-11200 MHz and 11450-11700 MHz. Although the 10950-11700 MHz band also includes 11200-11450 MHz, which is not used by Intelsat 903, the larger band is identified in Schedule S to eliminate the need to create duplicate, identical beams to include both sub-bands. The coverage contours and performance characteristics of all Intelsat 903 beams except for the global beams are provided in the Schedule S. The global 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 Page 2 of 13

files have not been included in Schedule S. Exhibits 1 and 2 provide the beam parameters for the Intelsat 903 uplink and downlink beams, respectively. Intelsat 903 is equipped with two steerable Ku-band spot beams. Gain contours for both beams are provided in Schedule S. Each steerable beam may be pointed toward any location on the earth that is visible from 31.5° W.L., and the coverage contours will remain identical in gain and roll-off regardless of pointing. Intelsat will ensure that transmissions in these beams are consistent with the Commission’s rules and the ITU Radio Regulations as they pertain to the Fixed Satellite Service. 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. The Intelsat 903 command and telemetry channel frequencies are shown in Exhibit 3. The coverage patterns of the 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 903 command and telemetry subsystem performance is summarized in Exhibit 3. 2.4 Uplink Power Control Subsystem Intelsat 903 utilizes two Ku-band channels for uplink power control (“ULPC”), antenna tracking, and ranging. The coverage patterns of the ULPC 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 903 ULPC frequencies and subsystem performance are summarized in Exhibit 3. Page 3 of 13

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 903 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 903 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 The power flux density (“PFD”) limits for space stations operating in the 3650 – 4200 MHz, 10950 – 11200 MHz, and 11450 -11700 MHz bands are specified in Section 25.208 of the Commission’s rules. The power flux density (“PFD”) limits for space stations operating in the 3625 – 3650 MHz are specified in No. 21.16 of the ITU Radio Regulations. The maximum PFD levels for the Intelsat 903 transmissions were calculated for the 3625 – 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 903 carriers do not exceed the limits specified in Section 25.208 of the Commission’s rules or the limits specified in No. 21.16 of the ITU Radio Regulations. 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 903 is designed to be compliant with the provisions of this rule. Page 4 of 13

Intelsat will comply with the provisions of Section 25.202(f) of the Commission’s rules with regard to Intelsat 903 emissions. 6 Orbital Location Intelsat requests that it be assigned the 31.5° W.L. orbital location for Intelsat 903. The 31.5° W.L. location satisfies Intelsat 903 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 Intelsat 903 will operate under existing filings of the United States Administration. Intelsat 903 operations in the 3700 – 4200 MHz and 5925 – 6425 MHz bands have been coordinated under the Administration of the United States’ ITU filings INTELSAT8 328.5E and INTELSAT9 328.5E. The downlink EIRP density of Intelsat 903 transmissions in the conventional or extended C-band will not exceed 3 dBW/4kHz for digital transmissions or 8 dBW/4kHz for analog transmissions, and associated uplink transmissions will not exceed applicable EIRP density envelopes in Sections 25.218 or 25.221(a)(1) unless the non-routine uplink and/or downlink operation is coordinated with operators of authorized co-frequency space stations at assigned locations within six degrees of Intelsat 903 at 31.5W.L. The downlink EIRP density of Intelsat 903 transmissions in the conventional or extended Ku- bands will not exceed 14 dBW/4kHz for digital transmissions or 17 dBW/4kHz for analog transmissions, and associated uplink transmissions will not exceed applicable EIRP density envelopes in Sections 25.218, 25.222(a)(1), 25.226(a)(1), or 25.227(a)(1) unless the non-routine uplink and/or downlink operation is coordinated with operators of authorized co-frequency space stations at assigned locations within six degrees of Intelsat 903 at 31.5° W.L. 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. Page 5 of 13

8.1 Spacecraft Hardware Design 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 the removal of all stored energy on the spacecraft by depleting all propellant tanks, venting all pressurized systems and by leaving the batteries in a permanent discharge state. 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. Subject to receipt of FCC approval, Intelsat 903 will be drifted to 31.5W.L. and will be operated co-located with Intelsat 25. During the relocation of Intelsat 903, Intelsat will take all the necessary steps to coordinate the move internally to minimize the risk of collision or interference between Intelsat 903 and Intelsat 25. 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 903. Intelsat is also not aware of any system with an overlapping station-keeping volume with Intelsat 903 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 intends to dispose of the spacecraft by moving it to an altitude of at least 283.3 kilometers above the geostationary arc. Intelsat has reserved 47.7 kilograms of fuel for this purpose. Page 6 of 13

In calculating the disposal orbit, Intelsat has used simplifying assumptions as permitted under the Commission’s Orbital Debris Report and Order.1 The effective area to mass ratio (Cr*A/M) of the Intelsat 903 spacecraft is 0.044 m2/kg, resulting in a minimum perigee disposal altitude under the Inter-Agency Space Debris Coordination Committee formula of 283.3 kilometers above the geostationary arc. Accordingly, the Intelsat 903 planned disposal orbit complies with the FCC’s rules. The reserved fuel figure was determined by the spacecraft manufacturer and 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. 9 TC&R Control Earth Stations Intelsat will conduct TC&R operations through one or more of the following earth stations: Fuchsstadt, Germany; Hartebeesthoek, South Africa; Mountainside, Maryland; or Fucino, Italy. Additionally, Intelsat is capable of remotely controlling Intelsat 903 from its facilities in McLean, VA or in Long Beach, CA. 1 Mitigation of Orbital Debris, Second Report and Order, IB Docket No. 02-54, FCC 04-130 (rel. June 21, 2004). Page 7 of 13

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/ Alexander Gerdenitsch January 30, 2017 Alexander Gerdenitsch Date Intelsat Manager, Spectrum Policy, Americas Page 8 of 13

EXHIBIT 1 COMMUNICATION SUBSYSTEM UPLINK BEAM PARAMETERS Beam Name C-Band Global C-Band Global West Hemi East Hemi Northwest Schedule S Beam ID CGRU CGLU WHLU EHLU NWRU Frequency Band (MHz) 6300 - 6425 6300 - 6425 5850 - 6300 5850 - 6300 5850 - 6300 Polarization RHCP LHCP LHCP LHCP RHCP G/T (dB/K) -6.7 -6.7 -2.2 -2.5 5.8 Minimum SFD-- -91.2 -92.6 -89.5 -89.7 -90.2 (dBW/m2) Maximum SFD-- -69.2 -70.6 -67.5 -67.7 -68.2 (dBW/m2) Beam Name Southwest Middle West Southeast Northeast Central West Schedule S Beam ID SWRU MWRU SERU NERU CWRU Frequency Band (MHz) 5850 - 6300 5850 - 6300 5850 - 6300 5850 - 6300 5850 - 6300 Polarization RHCP RHCP RHCP RHCP RHCP G/T (dB/K) 1.5 2.7 -0.8 4.2 -1.9 Minimum SFD-- -89.9 -91.2 -91.5 -92.0 -86.6 (dBW/m2) Maximum SFD-- -67.9 -69.2 -69.5 -70.0 -64.6 (dBW/m2) Beam Name Ku-Band Spot Ku-Band Spot Schedule S Beam ID S1HU S2VU Frequency Band (MHz) 14000 - 14500 14000 - 14500 Polarization Horizontal Vertical G/T (dB/K) 8.7 8.9 Minimum SFD-- -92.3 -91.8 (dBW/m2) Maximum SFD-- -74.3 -73.8 (dBW/m2) Page 9 of 13

EXHIBIT 2 COMMUNICATION SUBSYSTEM DOWNLINK BEAM PARAMETERS Beam Name C-Band Global C-Band Global West Hemi East Hemi Northwest Schedule S Beam ID CGLD CGRD WHRD EHRD NWLD Frequency Band (MHz) 4075 - 4200 4075 - 4200 3625 - 4075 3625 - 4075 3625 - 4075 Polarization LHCP RHCP RHCP RHCP LHCP Maximum Beam Peak -40.1 -39.8 -35.2 -34.6 -32.8 EIRP Density (dBW/Hz) Maximum Beam Peak 35.5 35.8 40.4 41.0 42.8 EIRP (dBW) Maximum Beam Peak -4.1 -3.8 0.8 1.4 3.2 EIRP Density (dBW/4kHz) Beam Name Southwest Middle West Southeast Northeast Central West Schedule S Beam ID SWLD MWLD SELD NELD CWLD Frequency Band (MHz) 3625 - 4075 3625 - 4075 3625 - 4075 3625 - 4075 3625 - 4075 Polarization LHCP LHCP LHCP LHCP LHCP Maximum Beam Peak -31.6 -28.0 -34.5 -29.7 -32.5 EIRP Density (dBW/Hz) Maximum Beam Peak 44.0 47.6 41.1 45.9 43.1 EIRP (dBW) Maximum Beam Peak 4.4 8.0 1.5 6.3 3.5 EIRP Density (dBW/4kHz) Beam Name Ku-Band Spot Ku-Band Spot Schedule S Beam ID SIVD S2HD 10950 – 11200 10950 – 11200 Frequency Band (MHz) 11450 - 11700 11450 - 11700 Polarization Vertical Horizontal Maximum Beam Peak -22.0 -21.8 EIRP Density (dBW/Hz) Maximum Beam Peak 53.6 53.8 EIRP (dBW) Maximum Beam Peak 14.0 14.2 EIRP Density (dBW/4kHz) Page 10 of 13

EXHIBIT 3 TC&R SUBSYSTEM CHARACTERISTICS Command Command Beam Name Global Bicone Schedule S Beam ID CMDG CMDB Frequencies (MHz) 6173.7 6176.3 Polarization LHCP LHCP Peak Flux Density at Command -90 -90 Threshold (dBW/m2-Hz) Telemetry Telemetry Beam Name ULPC ULPC Global Bicone Schedule S Beam ID TLMG TLMB UPKC UPCV 3947.5 & 3948.0 & 11198.0 & Frequencies (MHz) 3950.0 3952.0 3952.5 11452.0 Polarization RHCP RHCP RHCP Vertical Maximum Channel EIRP (dBW) 8.0 8.0 11.0 8.0 Maximum Beam Peak EIRP -6.0 -6.0 -3.0 0.0 Density (dBW/4kHz) Maximum Beam Peak EIRP -42 -42 -39 -36 Density (dBW/Hz) Note: RHCP: Right Hand Circular Polarization, LHCP: Left Hand Circular Polarization Page 11 of 13

EXHIBIT 4 Beam Polarizations and GXT File Names Schedule S Beam Names Linear Polarization Circular Polarization Beam Designation Uplink Uplink Downlink Downlink Uplink Uplink Downlink Downlink (H-Pol.) (V-Pol.) (H-Pol.) (V-Pol.) (LHCP) (RHCP) (LHCP) (RHCP) C-Band Beams Global Beam ---- ---- ---- ---- CGLU* CGRU* CGLD* CGRD* West Hemi ---- ---- ---- ---- WHLU ---- ---- WHRD East Hemi ---- ---- ---- ---- EHLU ---- ---- EHRD Northwest ---- ---- ---- ---- ---- NWRU NWLD ---- Southwest ---- ---- ---- ---- ---- SWRU SWLD ---- Middle East ---- ---- ---- ---- ---- MWRU MWLD ---- Southeast ---- ---- ---- ---- ---- SERU SELD ---- Northeast ---- ---- ---- ---- ---- NERU NELD ---- East ---- ---- ---- ---- ---- CWRU CWLD ---- Telemetry ---- ---- ---- ---- ---- ---- ---- TLMG* Global Telemetry Bicone ---- ---- ---- ---- ---- ---- ---- TLMB* Command ---- ---- ---- ---- CMDG* ---- ---- ---- Global Command Bicone ---- ---- ---- ---- CMDB* ---- ---- ---- C-band ULPC ---- ---- ---- UPCV* ---- ---- ---- ---- Ku-Band Beams Sri Lanka S1HU ---- S1VD ---- ---- ---- ---- ---- Central Europe ---- S2VU ---- S2HD ---- ---- ---- ---- Ku-band ULPC ---- ---- ---- ---- ---- ---- ---- UPKC* * GXT files are not provided for the indicated beams because their -8 dB gain contours extend beyond the edge of the Earth. Page 12 of 13

EXHIBIT 5 Uplink Band to Downlink Band Connections Uplink Downlink Uplink Downlink Channel Uplink Beam Uplink Center Downlink Downlink Center Channel Channel Bandwidth Name Polarization Frequency Beam Name Polarization Frequency Designation Designation (MHz) (MHz) (MHz) SKU1 S2VU Vertical 14042.5 SKD1 S2HD Horizontal 10992.5 77 SKU2 S2VU Vertical 14125 SKD2 S2HD Horizontal 11075 72 SKU3 S2VU Vertical 14205 SKD3 S2HD Horizontal 11155 72 SKU4 S2VU Vertical 14295 SKD4 S2HD Horizontal 11495 72 SKU5 S2VU Vertical 14355 SKD5 S2HD Horizontal 11555 36 SKU6 S2VU Vertical 14395 SKD6 S2HD Horizontal 11595 36 SKU7 S2VU Vertical 14435 SKD7 S2HD Horizontal 11635 36 SKU8 S2VU Vertical 14475 SKD8 S2HD Horizontal 11675 36 SKU1 S1HU Horizontal 14042.5 SKD1 S1VD Vertical 10992.5 77 SKU2 S1HU Horizontal 14125 SKD2 S1VD Vertical 11075 72 SKU3 S1HU Horizontal 14205 SKD3 S1VD Vertical 11155 72 SKU4 S1HU Horizontal 14295 SKD4 S1VD Vertical 11495 72 SKU5 S1HU Horizontal 14355 SKD5 S1VD Vertical 11555 36 SKU6 S1HU Horizontal 14395 SKD6 S1VD Vertical 11595 36 SKU7 S1HU Horizontal 14435 SKD7 S1VD Vertical 11635 36 SKU8 S1HU Horizontal 14475 SKD8 S1VD Vertical 11675 36 CU1 NWRU, 5890 CD1 NWLD, 3665 72 CU2 SWRU, 5970 CD2 SWLD, 3745 72 CU3 MERU, 6050 CD3 MELD, 3825 72 RHCP LHCP CU4 SERU, 6130 CD4 SELD, 3905 72 CU5 NERU, 6220 CD5 NELD, 3995 72 CU6 & CERU 6280 CD6 & CELD 4055 36 CGU1 CGRU RHCP 6320 CGD1 CGLD LHCP 4095 36 CGU2 CGRU RHCP 6360 CGD2 CGLD LHCP 4135 36 CGU3 CGRU RHCP 6402.5 CGD3 CGLD LHCP 4177.5 36 CGU1 CGLU LHCP 6320 CGD1 CGRD RHCP 4095 36 CGU2 CGLU LHCP 6360 CGD2 CGRD RHCP 4135 36 CGU3 CGLU LHCP 6402.5 CGD3 CGRD RHCP 4177.5 36 CU1 LHCP 5890 CD1 RHCP 3665 72 CU2 WHLU LHCP 5970 CD2 WHRD RHCP 3745 72 CU3 & LHCP 6050 CD3 & RHCP 3825 72 CU4 EHLU LHCP 6130 CD4 EHRD RHCP 3905 72 CU5 LHCP 6220 CD5 RHCP 3995 72 CU6 LHCP 6280 CD6 RHCP 4055 36 Page 13 of 13


Document Created: 2017-01-31 15:46:31
Document Modified: 2017-01-31 15:46:31
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