Attachment Schedule S GXT

This document pretains to SAT-MOD-20080904-00165 for Modification on a Satellite Space Stations filing.

IBFS_SATMOD2008090400165_663004

Return Link Budget GEN1 Handheld Return Link: 1.6 GHz up/7 GHz down Inner Outer Uplink Analysis Units Frequency 1.6 1.6 GHz EIRP per user -12.0 -9.8 dBW Altitude 1414 1414 km User elevation angle 70 25 deg Slant Range 1486 2528 km Path loss -160.0 -164.7 dB Polarization & Tracking loss -1 -1 dB S/C Rx Signal Strength -173.0 -175.5 dB Satellite antenna gain 13.09 17.78 dBi Line loss -2.00 -2.00 dB User signal at transponder -161.9 -159.7 dBW System noise temperature 396.64 396.64 K Thermal noise density, No -202.6 -202.6 dBW/Hz Average user data rate 2400 2400 bps Uplink Eb/(No) 6.9 9.1 dB Interference per channel -142.2 -138.3 dBW Spreading bandwidth 1.23 1.23 MHz Interference density, Io -203.1 -199.2 dBW/Hz Uplink Eb/(No+Io) 4.1 4.1 dB Nominal transponder gain 127.4 127.4 dB Downlink Analysis Frequency 6.98 6.98 GHz TX power per user -30.4 -28.1 dBW Transmit line loss -2.2 -2.2 dB Satellite antenna gain 7.10 7.10 dBi EIRP per user -25.4 -23.2 dBW GW elevation angle 40 40 deg Range 1969 1969 km Free space loss (40 deg GW elev) -175.2 -175.2 dB Polarization & tracking loss -0.1 -0.1 dB Pointing loss -1.0 -1.0 dB RX signal/user/satellite -201.7 -199.5 dBW GW antenna gain (incl. line losses) 49.5 49.5 dBi RX signal at antenna output/user/satellite -152.2 -150.0 dBW System noise temperature 127.7 127.7 K Thermal noise density, No -207.5 -207.5 dBW/Hz Interference per channel -151.40 -151.40 dBW Spreading bandwidth 1.23 1.23 MHz 1/(10*LOG(spreading bandwidth)) -60.9 -60.9 dB/Hz Interference Density, Io -212.3 -212.3 dBW/Hz Downlink Eb/(No+Io) 20.2 22.5 dB Coherent Combining gain 1.8 1.8 dB Overall (up&down) Eb/(No+Io) 5.8 5.8 dB Required Eb/No w/ power control margin 5.8 5.8 dB Available margin for propagation effects 16 16 dB


Document Created: 2008-09-04 15:46:09
Document Modified: 2008-09-04 15:46:09
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