HR: 17:00h
AN: C34A-05    [Abstracts]
TI: Laser pulse reflectance of the ocean surface from the GLAS satellite lidar
AU: * Lancaster, R S
EM: lancaster@virl.gsfc.nasa.gov
AF: Goddard Earth Science and Technology Center, NASA Goddard Space Flight Center, Code 613.1, Greenbelt, MD 20771 United States
AU: Spinhirne, J D
EM: jspin@virl.gsfc.nasa.gov
AF: NASA Goddard Space Flight Center, Code 613.1, Greenbelt, MD 20771 United States
AU: Palm, S P
EM: spp@virl.gsfc.nasa.gov
AF: Science Systems and Applications, Inc., NASA Goddard Space Flight Center, Code 613.1, Greenbelt, MD 20771 United States
AB: The world's oceans can potentially be used as an extended target for achieving a radiometric calibration of space borne lidar if the reflective properties of the surface can be accurately predicted from available environmental data such as wind speed. To test current understanding of ocean reflectance we compare surface pulse returns measured with the 1064 nm altimetry channel of the Geoscience Laser Altimeter System (GLAS) on the Ice, Cloud and land Elevation Satellite (ICESat) with the predictions of near-IR reflectance from current ocean models. Measurements of wind speed retrieved from the SeaWinds database of the QuikSCAT satellite provide the model input. We find that while ocean models do not provide a full description of the nadir lidar observations this calibration technique yields a precision that exceeds that accomplished using White Sands as a target and that does not require the coordination that accompanies specialized calibration experiments.
DE: 3311 Clouds and aerosols
DE: 3339 Ocean/atmosphere interactions (0312, 4504)
DE: 3360 Remote sensing
DE: 3394 Instruments and techniques
SC: Cryosphere [C]
MN: Fall Meeting 2005