The accuracy of satellite radar altimeter data over the Greenland Ice Sheet determined from airborne laser data

摘要: The 336 days of the geodetic phase ERS-1 provides dense coverage, by satellite radar altimetry, whole Greenland ice sheet. These data have been used to produce a digital elevation model errors present in altimeter were investigated via comparison with airborne laser an absolute accuracy typically range 2–10 cm ± 10 cm. Comparison differences between and derived elevations, showed correlation surface slope. difference two sets ranged from 84 79 for slopes below 0.1 degrees, 10.3 m 8.4 slope 0.7 degrees (the half power beam-width altimeter). An explanation behaviour as function is given terms pattern roughness on