
)*+,,*
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42!
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Uplink filter truncation loss 0 dB
Required HPA power capability MIN W
Satellite Input Parameters Value Units
Satellite longitude 61.00W degrees
Transponder type TWTA
Receive G/T 4.5 dB/K
Saturation flux density -93 dBW/m2
Satellite attenuator pad 0 dB
Satellite ALC 0 dB
EIRP (saturation) 50 dBW
Transponder bandwidth 36 MHz
Input back off total 10 dB
Output back off total AUTO dB
Intermodulation interference AUTO dB
Number of transponder carriers AUTO
Carrier/Link Input Parameters Value Units
Modulation 4-PSK
Required bit error rate performance 10^-6
Required Eb/No without FEC coding 10.53 dB
Required Eb/No with FEC coding 8 dB
Information rate 0.256 Mbps
Overhead 0 %
FEC code rate 0.875
Spreading gain 0 dB
Reed Solomon code 204/188
(1 + Roll off factor) 1.2
Carrier spacing factor 1.4
Bandwidth allocation step size 2 MHz
System margin 1 dB
Calculations at Saturation Value Units
Gain 1m^2 44.27 dB/m2
Uplink C/No 95.83 dB.Hz
Downlink C/No 102.53 dB.Hz
Total C/No 94.99 dB.Hz
Uplink EIRP for saturation 71.24 dBW
General Calculations Up Down Units
Elevation 15.98 15.98 degrees
True azimuth 247.38 247.38 degrees
Compass bearing 249.66 249.66 degrees
Path distance to satellite 39962.51 39962.51 km
Propagation time delay 0.133300 0.133300 seconds
Antenna efficiency 76.47 86.43 %
Antenna gain 41.70 52.90 dBi
Availability (average year) 99.9 99.9 %
Link downtime (average year) 8.766 8.766 hours
Availability (worst month) 99.615 99.615 %
Link downtime (worst month) 2.809 2.809 hours
Spectral power density -51.75 -27.82 dBW/Hz
Uplink Calculation Clear Rain Up Rain Dn Units
Uplink transmit EIRP 42.74 42.74 42.74
dBW
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