SORTIE Link Budget

0880-EX-CN-2017 Text Documents

Atmospheric & Space Technology Research Associates (ASTRA), LLC.

2018-04-16ELS_208052

SORTIE Link Budget Analysis Color Code Key Constants Symbol Values Units User Inputs Earth gravitational constant m 398600.5 km3/s2 calculated value Earth radius RE 6,378.14 km Heading Speed of Light c 3.00E+08 m Sub Heading Boltzmann Constant k 1.38E-23 J/K Design Element Symbol Units Uplink Downlink Downlink Link Frequency f GHz 0.45 0.468 0.468 Transmitter Power Ptx Watts 5.00 0.50 0.50 Transmitter Power Ptx dBW 6.99 -3.01 -3.01 Transmitter Antenna Gain Gtx dB 37.00 -1.00 -1.00 Antenna Transmitter Losses Ltx dB -0.5 -0.5 -0.5 Antenna Beam width qtx Deg 2.6 180.0 180.0 Antenna Misalignment atx Deg 0.5 0 0 Alignment Loss Lqtx dB -0.44 0.00 0.00 Equivalent Isotropic Radiated Power EIRP dBW 43.05 -4.51 -4.51 Losses Propagation Path Length S Km 1944.0 420.0 1861.3 <- Downlink calculated Space Loss Ls dB -151.29 -138.32 -151.25 (1) Directly Overhead; Atmospheric La dB -0.5 -0.5 -0.5 and (2) At 5 Deg Above Polarization Loss Lp dB -1 -1 -1 Horizon Total Losses L dB -152.79 -139.82 -152.75 Receiver Antenna Gain Gr dB -1.0 37.0 37.0 Antenna Receiver Loss Lr dB -0.5 -1 -1 Antenna Beam width qr Deg 180.0 2.6 2.6 Antenna Misalignment ar Deg 0 0.5 0.5 Alignment Loss Lqr dB 0.00 -0.44 -0.44 Total Receiver G dB -1.50 35.56 35.56 Sky (Antenna) Noise Temperature Ta K 300 200 200 Receiver Temperature Tr K 3270.00 300.00 300.00 System Noise Temperature Ts K 3570.00 500.00 500.00 Receiver Merit G/T DB(1/K) -37.03 8.57 8.57 Powers Power Flux Density f dB(W/m2) -93.72 -127.97 -140.90 Occupied Bandwidth kHz 0.00 3000 3000 Power Flux Spectral Density ff dB(W/m2/kHz) -106.55 -162.74 -175.67 Power Flux Spectral Density Limit ff dB(W/m2/kHz) 0.00 -158.02 -158.02 <- Spectral limit as Carrier Power Received Prx dBW -111.24 -108.77 -121.70 defined by NTIA Red Noise Spectral Density No dB(W/Hz) -193.07 -201.61 -201.61 Book for 460-470 MHz Carrier to Noise Density Prx/No dB(Hz) 81.83 92.84 79.91 Secondary User Rates Data Rate R Bps 1.92E+04 3.00E+06 1.50E+06 Eb/No Eb/No dB 39.00 28.07 18.15 Required Eb/No - Modulation Format Eb/No dB 10.3 9.6 9.6 Coding gain dB 0 2.5 2.5 Implimention Loss dB -15 -2 -2 Required Eb/No Eb/No dB 25.30 9.10 9.10 Required Margin dB 3 3 3 Margin dB 10.70 15.97 6.05


Document Created: 2018-04-16 16:23:13
Document Modified: 2018-04-16 16:23:13
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