a re-blog from earth observatory’s siberia field work
“Western Siberia is, in places, remote. However, much of the region can be accessed by a system of roads and rivers. When planning this expedition, the scientists needed to find the location of GLAS footprints – measurements taken by the Geoscience Laser Altimeter System aboard the ICESat Satellite – in the area as well as find routes to enter those footprints. The goal of the expedition is to measure by hand, on location, as many GLAS footprints as possible in the study area. This is called ground-truth validation, and is an essential part of understanding data acquired by remote sensing instruments. ”
Need to find out more about this relationship between remote sensing and on the ground measurements.