{"ob_id":7820,"uuid":"06f9d685f96f4b26ba7f1ff09f4a29d9","title":"ENVISAT ASAR","abstract":"The Advanced Synthetic Aperture Radar (ASAR) on-board ENVISAT is an active C-band radar that provides land cover data regardless of cloud cover and time of day/night. ASAR was designed for continuity with the image and wave modes of the ERS-1/2 AMI-SAR. It features enhanced capability in terms of coverage, range of incidence angles, polarisation, and modes of operation. This enhanced capability is provided by significant differences in the instrument design: a full active array antenna equipped with distributed transmit/receive modules which provides distinct transmit and receive beams, a digital waveform generation for pulse \"chirp\" generation, a block adaptive quantisation scheme, and a ScanSAR mode of operation by beam scanning in elevation.","keywords":"","identifier_set":["https://catalogue.ceda.ac.uk/api/v2/identifiers/5075/?format=json","https://catalogue.ceda.ac.uk/api/v2/identifiers/5076/?format=json"],"instrumentType":"radar","subInstrument":[],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/32319/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/32318/?format=json"]}