HR: 1340h
AN: C33B-0351    [Abstracts]
TI: An Application of Kriging and Kalman Filtering to Study Surface Characteristics and Height Changes over Antarctica Using ICESat Data
AU: * Nguyen, A T
EM: atnguyen@mit.edu
AU: Herring, T A
EM: tah@mit.edu
AB: We construct two high resolution DEMs of Antarctica to study height changes and other surficial characteristics by applying a combination of Kalman filtering and kriging techniques to ICESat 33-day repeat data. The first DEM at resolution approximately 5km was constructed by initially taking the mean of Laser2a 33-day data, then refining by applying a kriging/Kalman filter to subsequent repeat-tracks to produced final maps of height changes across four regions in Antarctica. To characterize surface slopes, we take advantage of the geometry of ICESat tracks to create a second DEM at resolution of approximately 1-6km along track, then refine to obtain across/along track slope information along with height changes. Our goal is to be able to construct a DEM as close to true surface height as possible by taking advantage of the very closely-spaced repeated 33-day tracks. Using this DEM and its associated slope information, we should be able to predict accurately surface height at locations close to ICESat footprints, and thus detecting small height changes signals.
DE: 1640 Remote sensing
DE: 0933 Remote sensing
SC: Cryosphere [C]
MN: 2004 AGU Fall Meeting