An Overview of Geometric Calibration and DSM Generation for ALOS-3 Optical Imageries

The “Advanced Land Observing Satellite-3 (ALOS-3)” is a follow-on mission of the optical sensors onboard the Advanced Land Observing Satellite (ALOS) in the series of land observing satellites launched by Japan Aerospace Exploration Agency (JAXA). It equips with a panchromatic optical sensor that has a ground resolution of 0.8 m and a multispectral optical sensor that has six spectral bands at a ground resolution of 3.2 m, while keeping the wide swath of 70 km that is the same as the preceding optical sensors onboard the ALOS. The satellite will acquire stereo imageries by using a function of large body-pointing up to 60 degrees from nadir. The digital surface model (DSM) will be generated from the stereo imageries as one of the high-level products. This paper reports on an overview of the geometric calibration and its derived DSM generation for the ALOS-3 optical imageries.