Quality status of high resolution global DSM generated from ALOS PRISM

Panchromatic Remote-sensing Instrument for Stereo Mapping, one of onboard sensors carried by Advanced Land Observing Satellite, was designed to generate worldwide topographic data with its optical stereoscopic observation. It has an exclusive ability to perform a triplet stereo observation along its track, and collected its derived images all over the world during the mission life of the satellite from 2006 through 2011. We have started a new project which generates global elevation datasets with the image archives since last year. The data is processed in unprecedented 5m grid spacing utilizing the original triplet stereo images in 2.5m resolution. As the number of processed data is growing steadily, a trend of actual data qualities became apparent more. This paper reports on up-to-date results of the quality assessments for the data products as well as some algorithm updates for the processing software.