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Proceedings Paper

Validation of precise digital surface model generated by PRISM onboard ALOS
Author(s): Takeo Tadono; Masanobu Shimada; Junichi Takaku
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Paper Abstract

This paper describes the generation of precise digital surface model (DSM) and its validation using the Panchromatic Remote-sensing Instrument for Stereo Mapping (PRISM) onboard the Advanced Land Observing Satellite (ALOS, nicknamed "Daichi"), which was successfully launched on January 24, 2006, and has worked very well more than 3.5 years. PRISM performs along-track triplet stereo observations with a forward-, nadir-, and backward-looking radiometer with 2.5 m ground resolution at nadir in a 35 km-wide swath. It is used to derive a precise DSM or digital elevation model (DEM) with high spatial resolution. The sensor calibration is very important in achieving the precise DSM generation using PRISM stereo pair images. This paper introduces updated calibration results of ALOS optical instruments, focusing on PRISM, and including time trends of accuracy improvements. We have achieved 7.8 m (RMSE) of absolute geometric accuracy of the PRISM nadirlooking radiometer. The validation of generated PRISM DSM is shown using reference DSM acquired by airborne Lidar. The height accuracy of the PRISM DSM has achieved 5.2 m (RMSE). Based on these calibration and validation results, we also investigate the validation of the global DEM (GDEM) produced by ASTER onboard the TERRA satellite that was released on June 29, 2009 using generated DSMs by PRISM in terms of global evaluations.

Paper Details

Date Published: 23 September 2009
PDF: 12 pages
Proc. SPIE 7474, Sensors, Systems, and Next-Generation Satellites XIII, 74740H (23 September 2009); doi: 10.1117/12.830828
Show Author Affiliations
Takeo Tadono, Japan Aerospace Exploration Agency (Japan)
Masanobu Shimada, Japan Aerospace Exploration Agency (Japan)
Junichi Takaku, Remote Sensing Technology Ctr. of Japan (Japan)


Published in SPIE Proceedings Vol. 7474:
Sensors, Systems, and Next-Generation Satellites XIII
Roland Meynart; Steven P. Neeck; Haruhisa Shimoda, Editor(s)

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