{"ob_id":44561,"computationComponent":[{"ob_id":44562,"uuid":"132af0ab09d34dd0bf918b6addd96c14","title":"Computation for JNCC Sentinel-1 indices Analysis Ready Data (ARD) VH/VV Cross Ratio Index","abstract":"Sentinel-1 dual polarisation data are obtained from the Defra and JNCC Sentinel-1 ARD CEDA dataset. The data are converted from decibel to linear scale prior to the VH/VV calculation and generation of the index files. This is performed in R v4.4.1 (R Core Team, 2024) using the calc function of the R package raster v3.6-26 (Hijmans, 2023). Data are provided in EPSG: 27700 OSGB36 / British National Grid, with a pixel size of 10m, and data is pixel-aligned to the source ARD file. No-data pixels are set to a value of -9999. Pixels with values of 50 or higher, or -50 or lower, were assigned the no-data value.\r\n\r\nContains modified Copernicus Sentinel data 2015-2025","keywords":"","inputDescription":null,"outputDescription":null,"softwareReference":null,"identifier_set":[]}],"acquisitionComponent":[{"ob_id":44578,"independentInstrument":[],"instrumentplatformpair_set":[{"ob_id":14311,"platform":"https://catalogue.ceda.ac.uk/api/v2/platforms/12319/?format=json","instrument":"https://catalogue.ceda.ac.uk/api/v2/instruments/44577/?format=json","relatedTo":{"ob_id":44578,"uuid":"530e1180024a488884e502bfbf07de14","short_code":"acq"}}]}],"identifier_set":[],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/213230/?format=json"]}