Abstract
Abstract. The Japan Aerospace Exploration Agency (JAXA) generated the global digital elevation/surface model (DEM/DSM) and orthorectified image (ORI) using the archived data of the Panchromatic Remote-sensing Instrument for Stereo Mapping (PRISM) onboard the Advanced Land Observing Satellite (ALOS, nicknamed "Daichi"), which was operated from 2006 to 2011. PRISM consisted of three panchromatic radiometers that acquired along-track stereo images. It had a spatial resolution of 2.5 m in the nadir-looking radiometer and achieved global coverage, making it a suitable potential candidate for precise global DSM and ORI generation. In the past 10 years or so, JAXA has conducted the calibration of the system corrected standard products of PRISM in order to improve absolute accuracies as well as to validate the high-level products such as DSM and ORI. In this paper, we introduce an overview of the global DEM/DSM dataset generation project, including a summary of ALOS and PRISM, in addition to the global data archive status. It is also necessary to consider data processing strategies, since the processing capabilities of the level 1 standard product and the high-level products must be developed in terms of both hardware and software to achieve the project aims. The automatic DSM/ORI processing software and its test processing results are also described.
Highlights
Topographical information is fundamental to any geo-spatial information and applications on Earth
Various satellite data and their derivative datasets were provided to examine global terrains with medium and fine resolutions, by the Shuttle Radar Topography Mission (SRTM), which was spearheaded by the National Aeronautics and Space Administration (NASA) and the National GeospatialIntelligence Agency (NGA) of the United States (Farr et al, 2007)
A new global digital elevation/surface model (DEM/DSM) dataset using the data acquired by the Panchromatic Remotesensing Instrument for Stereo Mapping (PRISM) onboard the Advanced Land Observing Satellite (ALOS, nicknamed “Daichi”) was launched by the Japan Aerospace Exploration Agency (JAXA) in collaboration with commercial partners NTT DATA Corp. and Remote Sensing Technology Centre of Japan (RESTEC)
Summary
Topographical information is fundamental to any geo-spatial information and applications on Earth. Various satellite data and their derivative datasets were provided to examine global terrains with medium and fine resolutions, by the Shuttle Radar Topography Mission (SRTM), which was spearheaded by the National Aeronautics and Space Administration (NASA) and the National GeospatialIntelligence Agency (NGA) of the United States (Farr et al, 2007) The global digital elevation model dataset, which uses data acquired by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER GDEM), was released in 2009 by NASA and the Ministry of Economy, Trade and Industry (METI), Japan, and a second version was released in 2011 (Tachikawa et al, 2011) This dataset has 1-arcsec spacing as its specification, but problems with its quality still remain. This paper describes an overview of the project as well as ALOS PRISM, the archived data status, the processing strategies including automatic processing software development, and test processing results of the feasibility study
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