Winds from SeaWinds on QuikSCAT & Topex Radar altimeter

Data are selected when the time difference of measurement between the two instruments is less than 30 mn, and when the distance between the centres of the SeaWinds wind cell and the closest Topex altimeter footprint is less than 12 km.

Every first order statistic is calculated for data selected over 140 orbits (10 days).

The 10-day mean values of wind speed differences fluctuate, but the amplitude is less than with ERS-2.

The colocation map shows that the distribution of the 30 mn colocated data is much more homogeneous than the one relative to ERS-2.


Data Period



1999/07/19 - 00431