HR: 0800h
AN: C51B-0274    [Abstracts]
TI: Ice, Cloud, and Land Elevation Satellite (ICESat) Data Quality Information
AU: * Marquis, M C
EM: marquism@nsidc.org
AF: National Snow and Ice Data Center (NSIDC), NSIDC/CIRES Campus Box 449 University of Colorado, Boulder, CO 80309-0449 United States
AU: Harding, D J
EM: David.J.Harding@nasa.gov
AF: NASA's Goddard Space Flight Center, NASA's Goddard Space Flight Center Planetary Geodynamics Branch Mail Code 698 Building 33, Room F324, Greenbelt, MD 20771-0001 United States
AU: Schutz, B E
EM: schutz@csr.utexas.edu
AF: Center for Space Research, University of Texas at Austin, Center for Space Research University of Texas at Austin, Austin, TX 78712-1085 United States
AU: Abshire, J
EM: James.Abshire@gsfc.nasa.gov
AF: NASA's Goddard Space Flight Center, NASA's Goddard Space Flight Center, Greenbelt, MD 20771
AU: Instrument and Science Teams, G
C51B-0274 AF: NASA's Goddard Space Flight Center, NASA's Goddard Space Flight Center, Greenbelt, MD 20771
AB: The Geoscience Laser Altimeter System (GLAS) instrument aboard the Ice, Cloud, and land Elevation (ICESat) satellite launched on 12 January 2003. The primary objective of the ICESat mission is to provide global measurements of polar ice sheet elevation to discern changes in ice volume (mass balance) over time. Secondary objectives of the mission are to measure sea ice roughness and thickness, cloud and atmospheric properties, land topography, vegetation canopy heights, ocean surface topography, and surface reflectivity. The GLAS instrument has three lasers, each of which has a 1064 nm laser channel for surface altimetry and dense cloud heights, and a 532 nm lidar channel for the vertical distribution of clouds and aerosols. The three lasers have been operated one at a time, sequentially throughout the mission. To extend mission life, the current operational mode has included 33-day to 56-day campaigns, several times per year. As of abstract submission, a total of seven operational campaigns have been completed. Multiple releases of the ICESat/GLAS data are now available at the National Snow and Ice Data Center (http://nsidc.org/data/icesat/). Here, we present data quality information for the several operational campaigns. The metadata table includes: Laser transmit energies for the two wavelengths; laser footprint size and shape; and pointing and geolocation accuracies. We also provide up-to-date information about the product release versions for each of the 15 data products.
UR: http://nsidc.org/data/icesat/
DE: 0726 Ice sheets
DE: 0738 Ice (1863)
DE: 0750 Sea ice (4540)
DE: 0758 Remote sensing
DE: 3311 Clouds and aerosols
SC: Cryosphere [C]
MN: Fall Meeting 2005