A consideration of attitude jitter on Digital Elevation Model(DEM) estimation with EOS-AM1/ASTER

摘要

Theoretical accuracy assessment of Digital Elevation Model (DEM) to be derived from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) of EOS-AM1(Earth Observing System-AM1) platform was conducted under the assumption of with/without Modulate Transfer Function (MTF) degradation due to sensor motion. As the results, it was found that Root Mean Square (RMS) error in terms of DEM estimation accuracy was 27.98 m with GCP for without sensor motion while that with random sensor motion of one fifth of Instantanuous Field of View (IFOV). 0.88 arcsec in terms of standard deviation of random motion was 29.21 m. In the same time MTF degradation due to random motion was around 9.5percent results in about 5percent decreasing cross correlation between 32 X 32 pixels image chips of stereo pair. Also it was found that matching accuracy was degraded from 0.85 to 1. 35 pixel.