Satellite system with 14/12 GHz frequency transmits a signal from earth station A to earth station B. The distance between earth station to satellite is 36000km. The downlink EIRP is 45dBW. The transponder receiver has a figure of merit of 5dB/K. The dish diameter of both receiving and transmitting antenna at the earth station is 4 meter with 65% aperture efficiency. The overall noise temperature for the receiving earth station is 140K. The uplink operates with a 10dB back off. The minimum total carrier to noise ratio of the system is specified to be 18dB. Assume other losses are negligible and the Boltzmanns constant is -228.6 dBW/K.  Calculate the uplink carrier to noise ratio.