The Global Altimeter Processing Scheme (GAPS) contains global data from the ERS-1, ERS-2 and TOPEX/Poseidon Altimeters.
The data is held at NOCS and is organised into files where each file contains a single orbit cycle of data for a given satellite. The data has been collocated onto a reference grid and the mean and residual sea surface heights are calculated at each point on the reference grid. The data is used for research purposes. Wave parameters provided are significant wave height from the Altimeter.