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Mars Relay Downlink Analysis


MR Beacon Parameters
Beacon Frequency 437.1000 MHz
Beacon Wavelength 0.686 m
Beacon Transmit Power 1.3 W
MR Antenna Gain 0.0 dBi
Effective Isotropic Rad Power 1.30 W
31.1 dBm
Signal Polarization RCP
Signal Modulation CW or FM
FM Subcarriers RC1 1484.06 Hz
RC2 1137.78 Hz
RC3 1028.11 Hz
TC 1376.34 Hz
Earth-Probe Distance 5.4E+09 m
Total Received Carrier Flux 3.57E-21 W/m2
Earth Receiving Antenna Stanford Ham Site
Antenna Diameter [m] 46
Antenna Gain [dBi] 46.5 21.5
Half Power Beam Width [degrees] 0.85 15.15
Antenna System Efficiency 0.40 0.50
Antenna Effective Area [m2] 664.8 2.6
System Temperature [K] 60 100
Noise Spectral Density [dBm/Hz] -180.8 -178.6
Search Bandwidth [Hz] 0.1 1.0
Coherence Loss 0.37 0.95
Misc Loss 0.95 0.95
Received Signal [dBm] -150.8 -170.7
CW Signal-to-Noise Ratio (linear) 10070.3 6.2
CW Signal-to-Noise Ratio [dB] 40.0 7.9

Last Update: 1996-11-19

Name: John L. Callas

Email: John.L.Callas@jpl.nasa.gov