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1.Calculation of Uplink path loss

  1.Up link frequency   Up link frequency is frequency at which Ground Station is communicating with Satellite. For C band up link frequency is in the order of  6 G Hz 
      
 2.  Up link path loss Up link path loss depend on up link frequency & distance between satellite and ground station

Up-link path loss=10 log(4pdC/f)2…(dB)………[1]
       Here
                         ‘d’ is the distance between satellite & ground station                                                                           ‘f’ is the frequency; C is the velocity of light

Example:   Distance between satellite & earth station is ‘d’= 37,000 Km
                Up link frequency ‘f’= 6.175 G Hz
               uplink loss or free space loss=  10 log(4p*37000*C/f)2                                                            =   20 log(4p*37000*C/f)
                                                           =   20log(4*p*37000*3*108/f)
                                                           =    199.61 dB 

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