ICESat was a satellite laser altimeter launched by NASA, and it continuously measured the e.g. the Greenland ice sheet in the period 2003-2009.
ICESat has been widely used to map the climate-change-driven changes of the ice sheet.
ICESat-derived ice volume changes rely on linear trend plus seasonal functions to fit the temporal distribution of measurements. The project aims to replace this simple function with more realistic temporal pattern derived by GRACE and test if the resulting residual error is reduced.