Attachment EngineeringStatement

This document pretains to SAT-MOD-20160916-00091 for Modification on a Satellite Space Stations filing.

IBFS_SATMOD2016091600091_1149739

Engineering Statement 1) Introduction Intelsat License LLC (“Intelsat”) seeks modification of its authority to operate a satellite designated as Intelsat 29e at 50.0° W.L. The modification requested reflects the ability to tune the frequencies of the command receivers over a range via ground command. This Engineering Statement updates only those portions of the previously provided Engineering Statement that change as a result of this modification application, specifically Section 2.3, Exhibit 5 and Exhibit 6. The remainder of the technical information previously provided remains unchanged and is incorporated by reference. 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. Intelsat 29e can be commanded through the use of two command channels that can have center frequencies in the ranges 5850.5 - 5853.0 MHz and 6422 - 6424.5 MHz, selectable via ground command in 100 kHz steps. The spacecraft telemetry is received through two of four telemetry channels centered at the frequencies 3701.25 MHz, 3701.75 MHz, 3702.25 MHz and 3702.75 MHz. The Intelsat 29e command and telemetry subsystem performance is summarized in Exhibit 5. Detailed calculation of the G/T, command threshold flux density and EIRP for each of the Intelsat 29e TC&R beams, as appropriate, is provided in Exhibit 6. Section 25.202(e) of the rules requires that the carrier frequency of each space station transmitter be maintained within 0.002% of the reference frequency. Intelsat 29e is designed to be compliant with the provisions of this rule as it pertains to the transmissions of the telemetry channels. Page 1 of 4

EXHIBIT 5: TC&R SUBSYSTEM CHARACTERISTICS Global Global Command Frequency (MHz) / Polarization (see note) Transfer Orbit / Emergency (tunable in 100 kHz 5850.5 – steps) 5853.0 (LHCP) n/a 6422.0 - 6424.5 (LHCP) On-Station (tunable in 100 kHz steps) 5850.5 - 5853.0 (LHCP) n/a 6422.0 - 6424.5 (V) Command Modulation FM FM Bandwidth of Command Carrier (kHz) Occupied Bandwidth 800 800 Allocated Bandwidth 3700 3700 Command Threshold (dBW/m2) Beam Peak -101.0 -80.0 Edge of Coverage -98.4 -77.4 Command G/T (dB/K) Beam Peak -31.0 -52.9 Edge of Coverage -33.6 -55.5 Telemetry Frequency (MHz) / Polarization (see note) Transfer Orbit / Emergency 3701.25 (LHCP) 3701.75 (LHCP) n/a 3702.25 (LHCP) 3702.75 (LHCP) On-Station 3701.25 (V) 3701.75 (V) n/a 3702.25 (V) 3702.75 (V) Telemetry Modulation PM PM Bandwidth of Telemetry Carrier (kHz) Occupied 300 300 Allocated 500 500 Telemetry EIRP Beam Peak 13.4 16.1 Edge of Coverage 10.8 13.5 On-Station Ranging Accuracy (meters) ≤ 30 ≤ 30 Note: H: Linear Horizontal Polarization RHCP: Right Hand Circular Polarization V: Linear Vertical Polarization LHCP: Left Hand Circular Polarization Page 2 of 4

EXHIBIT 6: TC&R SUBSYSTEM EIRP and G/T BUDGETS Antenna Global Global Global 6422.0 - 6422.0 - 5850.5 - Frequency (MHz) 6424.5 6424.5 5853.0 Polarization V LHCP LHCP Peak Antenna Gain -- includes antenna loss (dBi) 20.9 20.9 13.0 Antenna Noise Temperature (°K) 93.0 93.0 290.0 Receiver Noise Temperature (°K) 152607 152607 3911702 Total System Noise Temperature (°K) 152700 152700 3911992 Total System Noise Temperature (dB-K) 51.9 51.9 65.9 G/T (dB/K) -31.0 -31.0 -52.9 Command Threshold Flux Density (dBW/m2) -101.0 -101.0 -80.0 Antenna Global Global 3701.25 3701.25 3701.75 3701.75 Frequency (MHz) 3702.25 3702.25 3702.75 3702.75 Polarization V LHCP Transmitter Output Power (dBW) -2.4 10.0 Loss between transmitter output and the input of transmit telemetry antenna (dB) 4.8 7.0 Power into telemetry transmit antenna (dBW) -7.2 3.1 Power into telemetry transmit antenna (Watts) 0.2 2.0 Peak Antenna Gain -- including antenna loss (dB) 20.6 13.0 EIRP (dBW) 13.4 16.1 Page 3 of 4

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/ Dick Evans September 16, 2016 Dick Evans Date Intelsat Senior Principal Regulatory Engineer Page 4 of 4


Document Created: 2016-09-16 15:28:07
Document Modified: 2016-09-16 15:28:07
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