The Phased Array type-L band Synthetic Aperture Radar (PALSAR) is an active microwave sensor using L-band frequency and produces various products of different resolutions and performance. PALSAR is on board the Japanese earth observation Advanced Land Observing Satellite (ALOS) and was developed by the Japanese Aerospace Exploration Agency (JAXA). PALSAR data can be acquired during day or night, increasing the temporal coverage of data for a particular spatial extent. PALSAR is capable of detailed, all-weather, day and night observations and repeat-pass interferometry.