In the world of telecommunication, they pertain to the coverage and speed of the cellular network. The signal received from the cellular tower is the downlink, and the signal leaving your phone is the uplink. The effect of receiving the satellite telemetry using a narrow band receiver is that the loudest bits of the signal, representing the brightest parts of the image, are clipped. For C band up link frequency is in the order of 6 G Hz.
The bottom of AO-7’s uplink passband corresponds to the top of the downlink passband. In cellular systems, there are actually two types of channels: (1) Control, and (2) Communica-tion. The uplink data is then sent to the crosslink or downlink on-board processors for transmission to C2 or processing centers. Views of the earth from various geo orbit positions. Up link frequency Up link frequency is frequency at which Ground Station is communicating with Satellite. My animated video of the Planet Earth Globe.
The fundamental starting point with a satellite link is the frequency in use – the higher the frequency, the faster data can be passed over it.