{"ob_id":32777,"computationComponent":[{"ob_id":32778,"uuid":"e71c879b049f4ccca07542044df25f09","title":"Level 1 processing algorithm applied to Sentinel 1 raw data, Instrument Processing Facility (IPF) v2","abstract":"This computation involves the Level 1 processing algorithm applied to raw Synthetic Aperture Radar (SAR) data. This consists of Level 1 preprocessing, special handling for TOPSAR mode, Doppler centroid estimation, Level 1 Single Look Complex (SLC) processing algorithms and Level 1 post-processing to generate the output Single Look Complex (SLC) and Ground Range Detected (GRD) products as well as quicklook images. \r\n\r\nLevel-1 Single Look Complex (SLC) products consist of focused SAR data, geo-referenced using orbit and attitude data from the satellite, and provided in slant-range geometry. Slant range is the natural radar range observation coordinate, defined as the line-of-sight from the radar to each reflecting object. The products are in zero-Doppler orientation where each row of pixels represents points along a line perpendicular to the sub-satellite track.\r\n\r\nThe products include a single look in each dimension using the full available signal bandwidth and complex samples (real and imaginary) preserving the phase information. The products have been geo-referenced using the orbit and attitude data from the satellite and have been corrected for azimuth bi-static delay, elevation antenna pattern and range spreading loss.\r\n\r\nFor more information on the changes for this processing version please see the Sentinel 1 document libary under the docs tab.","keywords":"Synthetic Aperture Radar, Sentinel 1, Level 1, algorithm, SAR","inputDescription":null,"outputDescription":null,"softwareReference":null,"identifier_set":[]}],"acquisitionComponent":[{"ob_id":32774,"independentInstrument":[],"instrumentplatformpair_set":[{"ob_id":12586,"platform":"https://catalogue.ceda.ac.uk/api/v2/platforms/12319/?format=json","instrument":"https://catalogue.ceda.ac.uk/api/v2/instruments/12313/?format=json","relatedTo":{"ob_id":32774,"uuid":"4c4f080b0afb40b9a5522d0b3af9cf2f","short_code":"acq"}}]}],"identifier_set":[],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/146308/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/146309/?format=json"]}