  An algorithm for representing irregular satellite data obtained from advanced
synthetic aperture radar (ASAR) uniformly in space and time is introduced and
comparison with WAVEWATCH III model (WW3) data is carried out. Swell global
data for 2007 are analysed using statistical parameters such as bias and
scattering index. Satellite data showed a great spatial uniformity compared
with WW3 model. Results show underestimation of swell height by the model in
the tropics and at specific higher latitude regions.
