PALSAR CALVAL and generation of the continent scale mosaic products for Kyoto and Carbon Project

Masanobu Shimada; Osamu Isoguchi; Ake Rosenqvist; Takeo Tadono

doi:10.1117/12.800897

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9 October 2008 PALSAR CALVAL and generation of the continent scale mosaic products for Kyoto and Carbon Project

Masanobu Shimada; Osamu Isoguchi; Ake Rosenqvist; Takeo Tadono

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Proceedings Volume 7106, Sensors, Systems, and Next-Generation Satellites XII; 71060I (2008) https://doi.org/10.1117/12.800897
Event: SPIE Remote Sensing, 2008, Cardiff, Wales, United Kingdom

Abstract

ALOS has been on orbit for two years and a half after its launch on January 24 2006. After its initial calibration for the first six months, ALOS was thrown into the operational phase after Oct. 23 2006. In operation phase, PALSAR has been activated based on the basic mission operation plan that summarizes the requests for imaging from JAXA calibration team, the power users, Principal Investigator (PIs) of the ALOS Research announcement, and the Kyoto and Carbon initiatives for monitoring the forest deforestation and degradation. By now, ALOS collected the PALSAR data more than 700,000 scenes, which correspond to 8 times global, land coverage. The calibration results using the one year data set shows that PALSAR has an excellent performance of the radiometric accuracy of 0.6 dB using all the corner reflectors associated with the calibration experiments and 0.17 dB using the Swedish 5m sized corner reflectors, the geometric accuracy with 9.3 m (RSS). The polarimetric performance is that the amplitude variation of the VV/HH channels is 0.3 dB and phase is 0.3 degrees. In this paper, we will introduce the stability of the PALSAR calibration results for after operation phase. This covers the stability of the sensor its self and the update of the antenna pattern measurements, SCANSAR processing update, and the suppression of the ground radar interference. We also introduce the generation of the 50 meter spaced ortho-rectified PALSAR mosaic datasets for the Kyoto and Carbon Initiatives. Using the corner reflectors, we have monitored the temporal variation of the accuracies. We have also conducted the antenna pattern variation and the stabilities using the Amazon rain forest data.

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Masanobu Shimada, Osamu Isoguchi, Ake Rosenqvist, and Takeo Tadono "PALSAR CALVAL and generation of the continent scale mosaic products for Kyoto and Carbon Project", Proc. SPIE 7106, Sensors, Systems, and Next-Generation Satellites XII, 71060I (9 October 2008); https://doi.org/10.1117/12.800897

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