ALOS PALSAR – Radiometric Terrain Correction Creation of radiometrically terrain-corrected (RTC) products is a project of the Alaska Satellite Facility that makes SAR data accessible to a broader community of users…. PALSAR PALSAR (Phased Array type L-band Synthetic Aperture Radar) is an L-band SAR with 10 and 100 m resolutions that are capable of detailed, all-weather, day and night observations and repeat-pass interferometry. Release of new ALOS PALSAR RTC products commenced October 2014 and was completed a year later.

The main objective of the Advanced Land Observing Satellite (ALOS) is to contribute to cartography, regional observation, disaster monitoring, and resources surveying, by further advancing land observation technologies applied to the Japanese Earth Resources Satellite-1 (JERS-1), and the Advanced Earth Observing Satellite (ADEOS).

Since it does not need other sources of light such as the sun, SAR has the advantage of providing satellite images regardless day or night. Data included in the RTC project are Fine Beam and Polarimetric scenes in all global land areas except Antarctica, Greenland, Iceland, and northern Eurasia. It is an active microwave sensor imaging the earth day and night regardless of atmospheric weather conditions. The Japan Aerospace Exploration Agency (JAXA) is starting to process the precise global digital 3D map using some 3 million data images acquired by the Advanced Land Observing Satellite "DAICHI" (ALOS). PALSAR has a high-resolution mode and a ScanSAR mode; with the latter mode, the instrument scans wide swaths of 250-350 km, depending on … PALSAR has a ScanSAR observation mode, with a swath (250-350 km) that is three to five times wider than conventional SAR images. The PALSAR-2 aboard the ALOS-2 is a Synthetic Aperture Radar (SAR), which emits microwave and receives the reflection from the ground to acquire information.