Sun - 26 Jun 2022     
Satellite Link Budget Calculator page

Complete all white boxes and then click calculate button to obtain results in the green boxes.

1.calculation  of uplink path loss
        Uplink frequency GHz
        Range (35778 - 41679) km
       Uplink path loss dB
2.calculation of transmitting antenna gain
       Uplink antenna diameter m
       Uplink antenna aperture efficiency e.g. 0.65
       Uplink antenna transmit gain dBi
3.calculation of transmit EIRP & operating flux dencity
        Transmit power per carrier(W)
        Transmitter feader losses(dB)
        Antenna pointing loss
        No of carriers
        Amplifier back off
        Transmit  EIRP dBW
        Uplink pfd at satellite dBW/m^2
        Power rating of ground transmitter
4.Calculation of uplink to noise ratio
        Up link rain attenuation
        Satellite uplink G/T dB/K
        Uplink C/N dB
5.Calculation of satellite operating down link eirp
        Saturated EIRP (dB W)
        Saturated EIRP (watts)
        Saturation FD (dB/sq.m)
        Output back off (dB0
        In put back off (dB)
        Satellite operating downlink  EIRP dBW
        Satellite operating down link EIRP (watts)
6.Calculation of satellite operating band width
        Input data rate(Kb/S)
        Link overhead factor(%)(worst case)
        FEC rate coding
        Bits/symbol (m)
        Effective in put data rate
        Transmission rate
        Bandwidth Hz
7.Calculation of down link path loss
        Downlink frequency GHz
        Downlink path loss dB
8.Calculation of receiver antenna gain
        Downlink receive antenna diameter m
        Downlink receive antenna aperture efficiency e.g. 0.65
        Downlink receive antenna gain dBi
9.Calculation of reciver G/T
       Antenna elevation angle(deg)
       Antenna noise temp(K)
       Increase in noise temperature due to rain(K)
       LNA noise temp (K)
       System noise temp(k)
       Downlink receive antenna G/T dB/K
10.Calculation of link margin
       Down link rain attenuation (dB)
       Receive antenna pointing loss(dB)
       Eb/No Required for BER of 1/10^7
       Downlink C/N (dB Hz)
       Overall down-link C/No [dB Hz]
       Available Eb/No
Available link margin

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