Eliminating error in satellite observations of surface elevation



From 2003 to 2009, NASA's Ice, Cloud, and Land Elevation Satellite (ICESat) captured detailed elevation measurements of the Earth's surface. Unfortunately, as with all instruments, ICESat's observations experienced sensor drift throughout its lifetime, a changing bias that introduced error into the satellite's observations. Correcting for such creeping biases is difficult but crucial for maximizing the value of the observational record.