Remote Sensing Map

http://www.nohrsc.noaa.gov/earth/archive.html

This is a map that was taken from the NOAA website in reference to the amount of snow that was recorded across the globe for January 1, 2008. I think that one of the remote sensing techniques that is being used in Google Earth and in this image would definitely be the active remote sensing of lidar because it seems to me that there is a lot of land covered and that by using satellites and forcing the wavelengths to go where one would want, it could produce an image similar to the one seen above. However, I also think that there is a lot of potential for detail to the photos in Google Earth and that is why I believe that there might also be some other passive remote sensing techniques as well.