Читать книгу Surface Displacement Measurement from Remote Sensing Images - Olivier Cavalie - Страница 28

ALOS-4, planned to be launched in 2022, is a successor of the Japanese SAR L-band missions ALOS and ALOS-2. Its PALSAR3 instrument will be primarily activated with right-side looking and in a stripmap mode with an increased 200 km swath (compared to 50 km with the ALOS-2 PALSAR2), while maintaining the high temporal resolution with a revisit time of 14 days and covering an incidence angle from 30 to 44°; the other beams (ScanSAR and spotlight modes) and left-side observation are used for quick disaster monitoring. The ALOS-4 will be equipped with an AIS receiver, as with the ALOS-2, for maritime surveillance purposes. To deal with the deforestation issue, ALOS-4 will conduct observations more frequently, with five times more precision, in order to detect smaller deforestation areas than ALOS-2. ALOS-4 will acquire data more frequently than ALOS-2; thus, interferometric data will lead to more efficient infrastructure maintenance.