The Geosat radar altimeter

The GEOSA T radar altimeter is an improved version of the one flown on Seasat. The characteristics of the return signal from the ocean surface are discussed as a basis for understanding the altimetry process. The primary measurements provided by the altimeter are listed along with a description of altimeter hardware implementation. The processing and corrections to the raw measurements to yield the end-user data products are presented, followed by a summary of the altimeter's in-orbit performance.