Sanosat-2 Link Budget

  1. Uplink
SANOSAT-2 Uplink Link Budget Analysis
Modulation Type: GFSK at 500 bps and Fdev=1kHz
 
 Frequency:436.6MHz 
 Distance:815kmat 35 Degrees
 Transmit Power:14W 
  11.46128036dBW 
     
     
GSTransmit Antenna Gain:2.2dBi 
EIRP:13.66128036dBWPower+Antenna Gain
Tranmission Loss at GS2dB 
     
     
Uplink PathFree Space Path Loss:143.4548268dB32.4+20log(d)+20log(f)
Antenna Pointing Loss:1dB 
Antenna Polorization Loss:1dB 
Atmospheric Loss:2dB 
Ionospheric Loss:1dB 
Rain Loss:0dB 
     
     
SpacecraftIsotropic Signal Level at Spacecraft-136.7935464dBEIRP-Losses
Spacecraft Antenna Pointing Loss0.2dB 
Spacecraft Antenna Gain2.2dBi 
Spacecraft Line Loss1dB 
Receiver Sensitivity-126dBm 
Receiver Sensitivity-156dBW 
Received Power-135.7935464  
     
     
 Link Margin20.20645355dB 

2. Uplink using SNR Method

SANOSAT-2 Uplink Link Budget Analysis using SNR Method
 
 Frequency:436.6MHz 
 Distance:815kmAt around 25 degrees of elevation
 Transmit Power:14WPt
 11.46128036dBW 
GSTransmit Antenna Gain:2.2dBi 
 EIRP:13.66128036dBW 
 Tranmission Loss at GS2dB 
 
 
Uplink PathFree Space Path Loss:143.4548268dB 
Antenna Pointing Loss:1dB 
Antenna Polorization Loss:1dB 
Atmospheric Loss:2dB 
Ionospheric Loss:1dB 
Rain Loss:0dB 
 
 
SpacecraftIsotropic Signal Level at Spacecraft-136.7935464dB 
Spacecraft Antenna Pointing Loss0.2dB 
Spacecraft Antenna Gain2.2dBi 
Spacecraft Line Loss1dB 
Spacecraft Noise Temperature600K 
Figure of Merit-26.5815125dB/K 
Signal Power at Input of LNA-135.7935464dBW 
Spacecraft Receiver Bandwidth2000Hz 
Boltzman’s Constant-228.6dbW/K/Hz 
Noise Power at Receiver-167.8081875dBW 
Signal to Noise Power Receiver32.01464109dB 
Required SNR12.8dB 
 Link Margin19.21464109dB 

3. Downlink using SNR Method

SANOSAT-2 Down Link Budget Analysis using SNR Method
 
 Frequency:436.6 MHz 
Orbital Altutude500 km 
Elevation Angle30 Deg 
Distance:909.5025169 =   km 
Transmit Power:1 WPt
0 dBW 
     
SpacecraftSpacecraft Antenna Gain2.2 dBi 
Spacecraft Line Loss1 dB 
EIRP1.2  Transmit Power-Gain-Loss
      
  GFSK(2K00F1D)CW Morse (500H A1A)  
Downlink PathFree Space Path Loss:144.4077527144.4077527dB 
Antenna Pointing Loss:11dB 
Antenna Polorization Loss:11dB 
Atmospheric Loss:22dB 
Ionospheric Loss:11dB 
Rain Loss:00dB 
      
      
Ground StationIsotropic Signal Level at GS-148.2077527-148.2077527dB 
GS Antenna Pointing Loss0.20.2dB 
GS Antenna Gain1212dB 
GS Transmission Loss22dB 
Ground Station Effective Noise Temperature:635635K 
Ground Station Figure of Merrit (G/T):-18.22773725-18.22773725dB/K 
Signal Power at Input of LNA-138.4077527-138.4077527dBW 
Boltzman’s Constant-228.6-228.6dbW/K/Hz 
Receiver Bandwidth2000500Hz 
Receiver Noise Power-167.5619628-173.5825627dBW 
SNR at Receiver29.1542100635.17480997dB 
Required SNR12.810dB 
 Link Margin16.3542100625.17480997dB 

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