2024-03-29T02:35:53.971Zhttps://cmr.earthdata.nasa.gov/opensearch/collections.atomCMRechodev@echo.nasa.govECHO dataset metadataSearch parameters: satellite => Envisat boundingBox => startTime => endTime => 2681021https://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C1965336876-ESACMRechodev@echo.nasa.govCEOSFEDEOEnvisat AATSR ARC L2P/L3U [UPA-L2P_GHRSST/UPA-L3U_GHRSST]The L2P product contains full resolution dual-view Sea Surface Temperature (SST) values. These SST use the ARC SST retrieval and cloud screening which differ from the methods used to produce the Gridded Surface Temperature (ATS_NR__2P) products. In addition to SST, the L2P products contain the ATSR Saharan Dust Index (ASDI) and the clear-sky probability estimated by the ARC cloud detection algorithm. The L2P processor also generates L3U products; these are the L2P products averaged onto a regular grid at 0.1 degree resolution (they are therefore similar to the AR / Meteo Envisat-format products). The L2P and L3U products are provided in NetCDF-4 format following GHRSST Data Specifications (GDS) v2. The L2P/L3U archive was reprocessed in 2013 with a new processor based upon the ARC SST; the changes are outlined in full in the L2P Reprocessing User Notehttps://earth.esa.int/eogateway/documents/20142/37627/User%20Note%20for%20%28A%29ATSR%20L2P%20ReprocessingC1965336876-ESA2002-05-20T00:00:00.000Z/2012-04-08T23:59:59.999ZEnvisat AATSR ARC L2P/L3U [UPA-L2P_GHRSST/UPA-L3U_GHRSST]ENVISAT.UPA-L2P-L3UNAESAESA/ESRIN2CARTESIAN-90 -180 90 180falsefalsefalsefalsefalsefalsefalsefalse2.8028int.esa.fedeotruehttps://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C1965336855-ESACMRechodev@echo.nasa.govCEOSFEDEOEnvisat AATSR ARC Level 3 products [ATS_AVG_3PAARC]The recommended AATSR Level 3 products for Sea Surface Temperature (SST) applications are the ARC (ATSR Re-processing for Climate) Level 3 products. ARC reprocesses the ATSR multi-mission archive using new cloud detection and SST retrievals to produce a homogenous record of sea surface temperature. The main ARC objective is to reduce regional biases in retrieved SST to less than 0.1 K for all global oceans while creating a very homogenous record with a stability (lack of drift in the observing system and analysis) of 0.05 K per decade. ARC products are available for ATSR-1, ATSR-2 and AATSR. ARC products are provided in netCDF format and contain data for both the skin SST and the SST estimated for depths of 0.2 and 1.0 m (corresponding approximately to drifter and moored buoy depths). The AATSR estimated depth SSTs are adjusted to a local equatorial crossing time of 10:30 (approximately half an hour after observation), to provide continuity with ATSR-1 and ATSR-2 data. The ARC project was led by Chris Merchant (University of Reading, formerly of the University of Edinburgh) and funded by NERC and the UK Government. Further documentation is available via the NEODC website: https://catalogue.ceda.ac.uk/uuid/ff8a7f27b827c108dd9756adffaaa942C1965336855-ESA2002-07-22T00:00:00.000Z/2012-04-08T23:59:59.999ZEnvisat AATSR ARC Level 3 products [ATS_AVG_3PAARC]ENVISAT.ATS_AVG_3PAARCNAESAESA/ESRIN3CARTESIAN78 -180 85 180falsefalsefalsefalsefalsefalsefalse2.8028int.esa.fedeotruehttps://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C1965336847-ESACMRechodev@echo.nasa.govCEOSFEDEOEnvisat AATSR Averaged Surface Temperature (AST) Product [ATS_AR__2P]The Averaged Surface Temperature (AST) Product contains averaged geophysical data at two different resolutions, and with respect to two different averaging schemes. Measurement data sets at resolutions of 0.5 by 0.5 degrees and 10 by 10 arcmin with respect to a latitude/longitude grid provide continuity with existing ATSR products. Other data sets contain data averaged over equal area cells of 50 by 50 km and 17 by 17 km aligned with the satellite ground track. Both top-of-atmosphere and surface data sets are provided. The surface temperature data sets provide, for sea cells, nadir and dual view sea surface temperatures, and for land cells, land surface temperature and NDVI. Cloud data is also included. No ADS are included in the AST product; auxiliary data is contained within the MDS. The data sets of the AST product are arranged by surface type and resolution. This product is a continuation of ERS ATSR data. The 3rd reprocessing of AATSR data was performed in 2013; the processing updates that have been put in place and the scientific improvements are outlined in full in the User Summary Note for the Third Envisat AATSR Reprocessing https://earth.esa.int/eogateway/documents/20142/37627/IDEAS-VEG-OQC-REP-2148-%28A%29ATSR-Third+Reprocessing-Dataset-User-Summary-v1-0.pdfC1965336847-ESA2002-05-20T00:00:00.000Z/2012-04-08T23:59:59.999ZEnvisat AATSR Averaged Surface Temperature (AST) Product [ATS_AR__2P]ENVISAT.ATS.AR__2PNAESAESA/ESRIN2CARTESIAN-90 -180 90 180falsefalsefalsefalsefalsefalsefalsefalse2.8028int.esa.fedeotruehttps://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C1965336853-ESACMRechodev@echo.nasa.govCEOSFEDEOEnvisat AATSR Gridded Brightness Temperature/Reflectance [ATS_TOA_1P]The Gridded Brightness Temperature/Reflectance (GBTR) product contains top of atmosphere (TOA) brightness temperature (BT) values for the infra-red channels and reflectance values for the visible channels. Values for each channel and for the nadir and forward views occupy separate measurement data sets. Additional MDS contain cloud and land/sea flags and confidence flags for each image pixel. This product is a continuation of ERS ATSR data. The 3rd reprocessing of AATSR data was performed in 2013; the processing updates that have been put in place and the expected scientific improvements are outlined in full in the User Summary Note for the Third Envisat AATSR Reprocessing https://earth.esa.int/eogateway/documents/20142/37627/IDEAS-VEG-OQC-REP-2148-%28A%29ATSR-Third+Reprocessing-Dataset-User-Summary-v1-0.pdfC1965336853-ESA2002-05-20T00:00:00.000Z/2012-04-08T23:59:59.999ZEnvisat AATSR Gridded Brightness Temperature/Reflectance [ATS_TOA_1P]ENVISAT.ATS.TOA_1PNAESAESA/ESRINCARTESIAN-90 -180 90 180falsefalsefalsefalsefalsefalsefalsefalse2.8028int.esa.fedeotruehttps://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C1965336852-ESACMRechodev@echo.nasa.govCEOSFEDEOEnvisat AATSR Gridded Surface Temperature [ATS_NR__2P]The Gridded Surface Temperature (GST) Product is the Level 2 full resolution geophysical product. It contains a single measurement data set the content of which is switchable, that is to say, the content of each pixel field will depend on the surface type. Specifically, the contents of the data fields will depend on the setting of the forward and nadir cloud flags and the land flag. The principal annotation data sets from the GBTR product from which the GST is derived are also included in this product. This product is a continuation of ERS ATSR data. The 3rd reprocessing of AATSR data was performed in 2013; the processing updates that have been put in place and the scientific improvements are outlined in full in the User Summary Note for the Third Envisat AATSR Reprocessing https://earth.esa.int/eogateway/documents/20142/37627/IDEAS-VEG-OQC-REP-2148-%28A%29ATSR-Third+Reprocessing-Dataset-User-Summary-v1-0.pdfC1965336852-ESA2002-05-20T00:00:00.000Z/2012-04-08T23:59:59.999ZEnvisat AATSR Gridded Surface Temperature [ATS_NR__2P]ENVISAT.ATS.NR__2PNAESAESA/ESRIN2CARTESIAN-90 -180 90 180falsefalsefalsefalsefalsefalsefalsefalse2.8028int.esa.fedeotruehttps://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C2619280648-ESACMRechodev@echo.nasa.govCEOSFEDEOEnvisat AATSR L1B Brightness Temperature/Radiance [ENV_AT_1_RBT]The Envisat AATSR Level 1B Brightness Temperature/Radiance product (RBT) contains top of atmosphere (TOA) brightness temperature (BT) values for the infra-red channels and radiance values for the visible channels, on a 1-km pixel grid. Values for each channel and for the nadir and oblique views occupy separate NetCDF files within the Sentinel-SAFE format, along with associated uncertainty estimates. Additional files contain cloud flags, land and water masks, and confidence flags for each image pixel, as well as instrument and ancillary meteorological information. This AATSR product [ENV_AT_1_RBT] in NetCDF format stemming from the 4th AATSR reprocessing, is a continuation of ERS ATSR data and a precursor of Sentinel-3 SLSTR data. It has replaced the former L1B product [ATS_TOA_1P] in Envisat format from the 3rd reprocessing. Users with Envisat-format products are recommended to move to the new Sentinel-SAFE like/NetCDF format products. The 4th reprocessing of ENVISAT AATSR data was completed in 2022; the processing updates that have been put in place and the expected scientific improvements have been outlined in full in the _$$User Documentation for (A)ATSR 4th Reprocessing Products$$ https://earth.esa.int/documents/20142/37627/QA4EO-VEG-OQC-MEM-4538_User_Documentation_for__A_ATSR_4th_Reprocessing_Level_1.pdf .C2619280648-ESA2002-05-20T00:00:00.000Z/2012-04-08T23:59:59.999ZEnvisat AATSR L1B Brightness Temperature/Radiance [ENV_AT_1_RBT]EnvisatAATSRL1BBrightnessTemperatureRadianceAT1RBTNAESAESA/ESRINNACARTESIAN-90 -180 90 180falsefalsefalsefalsefalsefalsefalsefalse2.8028https://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C1965336848-ESACMRechodev@echo.nasa.govCEOSFEDEOEnvisat AATSR Level 2 LST products from UOL [ATS_LST_2P]The UOL LST product contains full resolution nadir-view Land Surface Temperature (LST) values, generated by the University of Leicester (UOL). These products use the same LST retrieval method as the Gridded Surface Temperature (ATS_NR__2P) products, however significantly improved auxiliary datasets for land cover, green vegetation fraction and total column water vapour are applied (see "Available Resources" section below for details). In addition to LST, the UOL LST products contain the aforementioned auxiliary information, LST uncertainty estimates, NDVI and quality control flags. The UOL LST products are provided in NetCDF-4 format, and have been generated from the 3rd reprocessed AATSR dataset by the LST project team at the University of Leicester funded by ESA and NCEO.C1965336848-ESA2002-05-20T00:00:00.000Z/2012-04-08T23:59:59.999ZEnvisat AATSR Level 2 LST products from UOL [ATS_LST_2P]ENVISAT.ATS.LST_2PNAESAESA/ESRIN2CARTESIAN-90 -180 90 180falsefalsefalsefalsefalsefalsefalse2.8028int.esa.fedeotruehttps://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C1965336850-ESACMRechodev@echo.nasa.govCEOSFEDEOEnvisat AATSR Level 3 LST products from UOL [ATS_LST_3P]The recommended AATSR Level 3 products for Land Surface Temperature (LST) applications are the Level 3 products that have been produced by the University of Leicester (UOL). These Level 3 products have been generated from Level 2 UOL LST products which use the same LST retrieval method as the Gridded Surface Temperature (ATS_NR__2P) products. However, significantly improved auxiliary data sets for land cover, green vegetation fraction and total column water vapour are also applied (see "Available Resources" section below for details). In addition to LST, the UOL LST products contain the aforementioned auxiliary information, LST uncertainty estimates, NDVI and quality control flags. The Level 3 products are provided in NetCDF-4 format, and have been generated from the 3rd reprocessed AATSR dataset by the LST project team at the University of Leicester funded by ESA and NCEO. Further documentation is available via the NEODC website: https://catalogue.ceda.ac.uk/uuid/1d0c047ea3ced97cc7e988d7d286052aC1965336850-ESA2002-07-24T00:00:00.000Z/2012-04-08T23:59:59.999ZEnvisat AATSR Level 3 LST products from UOL [ATS_LST_3P]ENVISAT.ATS.LST_3PNAESAESA/ESRIN3CARTESIAN-90 -180 90 180falsefalsefalsefalsefalsefalsefalse2.8028int.esa.fedeotruehttps://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C1965336851-ESACMRechodev@echo.nasa.govCEOSFEDEOEnvisat AATSR Meteo product [ATS_MET_2P]The data was original designed as a fast delivery Meteo product for use by meteorological offices, and contains averaged BT and SST at 10 arc minute resolution. The single MDS comprises the fields of MDS#3 (SST record, 10 arc min cell) of the AST product, with the addition of Average Brightness Temperature (ABT) fields (BT/TOA sea record, 10 arc min cell) to make it more self-contained. This product is a continuation of ERS ATSR data. The 3rd reprocessing of AATSR data was performed in 2013; the processing updates that have been put in place and the scientific improvements are outlined in full in the User Summary Note for the Third Envisat AATSR Reprocessing https://earth.esa.int/eogateway/documents/20142/37627/IDEAS-VEG-OQC-REP-2148-%28A%29ATSR-Third+Reprocessing-Dataset-User-Summary-v1-0.pdfC1965336851-ESA2002-05-20T00:00:00.000Z/2012-04-08T23:59:59.999ZEnvisat AATSR Meteo product [ATS_MET_2P]ENVISAT.ATS.MET_2PNAESAESA/ESRIN2CARTESIAN-90 -180 90 180falsefalsefalsefalsefalsefalsefalsefalse2.8028int.esa.fedeotruehttps://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C1965336818-ESACMRechodev@echo.nasa.govCEOSFEDEOEnvisat ASAR AP Co- and Cross-polar L0 [ASA_APC/APH/APV_0P]The ASAR Alternating Polarization Mode Level 0 (Co-polar and Cross-polar H and V) products contain time-ordered Annotated Instrument Source Packets (AISPs) corresponding to one of the three possible polarisation combinations: HH & HV, VV & VH and HH & VV, respectively. The echo samples in the AISPs have been compressed to 4 bits/sample using FBAQ. This is a high-rate, narrow swath mode, so data is only acquired for partial orbit segments. There are two co-registered images per acquisition and may be from one of seven different image swaths. The Level 0 product was produced systematically for all data acquired within this mode. Data Size: 56-100 km across track x 100 km along track There are three AP Mode Level 0 products: - ASA_APH_0P: The Cross-polar H Level 0 product corresponds to the polarisation combination HH/HV. - ASA_APV_0P: The Cross-polar V Level 0 product corresponds to the polarisation combination VV/VH. - ASA_APC_0P: The Co-polar Level 0 product corresponds to the polarisation combination HH/VV= H and H received/V transmit and V received.C1965336818-ESA2002-11-15T00:00:00.000Z/2012-04-08T23:59:59.999ZEnvisat ASAR AP Co- and Cross-polar L0 [ASA_APC/APH/APV_0P]ASA_AP__0P_ScenesNAESAESA/ESRINNACARTESIAN-90 -180 90 180falsefalsefalsefalsefalsefalsefalsefalse1.43int.esa.fedeotrue