The SENTINEL-3 GPS receiver contributes to satellite control, provides accurate on-board timing, controls the open-loop mode of the altimeter by providing real-time radial position data and provides the measurements for the final POD analysis.
The receiver is capable of receiving the L1 C/A, L1P(Y) and the L2P(Y) signals of the GPS constellation. It tracks up to eight satellites and two signal bands in parallel. The GPS receivers on SENTINEL-3 satellites are able to track additional signals in order to adapt to the changing GPS constellation and the introduction of the Galileo system.
The SENTINEL-3 GPS receiver consists of the antenna, the harness and the receiver unit itself.
Figure 1: GNSS Instrument (Credit: ESA)
Figure 2: GNSS Antenna (Credit: ESA)