https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 23.8 2026-04-29T10:52:37.449Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/platforms/5449d87b-5573-450f-8acb-2fdfeab3c8ce 2018-11-05 Sentinel-3A Date=2018-11-05 User Id=mmorahan Entity=PrefLabel Operation=UPDATE Field=text User Note=Rename Concept System Note=update PrefLabel Old Value=Sentinel 3A New Value=SENTINEL-3A Date=2021-01-13 User Id=sritz Entity=PrefLabel Operation=UPDATE Field=text System Note=update PrefLabel Old Value=SENTINEL-3A New Value=Sentinel-3A Date=2019-02-22 User Id=mmorahan Entity=WeightedRelation Operation=INSERT System Note=insert WeightedRelation New Value=id: null related concept uuid: 7204c4d5-b7d0-41af-ba90-61d47c6dc610 relationship type: null relationship value: null generated by: null Date=2018-11-05 User Id=mmorahan Entity=BroaderRelation Operation=INSERT User Note=Insert Concept System Note=add broader relation New Value=Sentinel 3A [5449d87b-5573-450f-8acb-2fdfeab3c8ce,368235] - SENTINEL-3 [8a19f309-46ee-424b-be9f-e7e57e5b8ca0,345357] Date=2019-02-22 User Id=mmorahan Entity=WeightedRelation Operation=INSERT System Note=insert WeightedRelation New Value=id: null related concept uuid: 7b6e3162-1314-4441-b33a-e2b68ae85bcd relationship type: null relationship value: null generated by: null Date=2019-02-22 User Id=mmorahan Entity=WeightedRelation Operation=INSERT System Note=insert WeightedRelation New Value=id: null related concept uuid: 9bfd9ff7-b838-4834-bd47-0127384c79f7 relationship type: null relationship value: null generated by: null Date=2019-02-22 User Id=mmorahan Entity=WeightedRelation Operation=INSERT System Note=insert WeightedRelation New Value=id: null related concept uuid: be02e58f-ce2f-448f-8a81-74bcc4eb7056 relationship type: null relationship value: null generated by: null Date=2021-01-13 User Id=sritz Entity=AltLabel Operation=UPDATE Field=text System Note=update AltLabel Old Value=SENTINEL-3A New Value=Sentinel-3A Date=2018-11-05 User Id=mmorahan Entity=Definition Operation=INSERT System Note=insert Definition New Value=id: null text: Mission Details Launch Date: Sentinel-3A - 16 February 2016 Sentinel-3B - 25 April 2018 Operational lifepsan: 7 years (With consumables for 12) Mission objectives: Measuring sea-surface topography, sea-surface height and significant wave height Measuring ocean and land-surface temperature Measuring ocean and land-surface colour Monitoring sea and land ice topography Sea-water quality and pollution monitoring Inland water monitoring, including rivers and lakes Aid ocean forecasts with acquired data Climate monitoring and modelling Land-use change monitoring Forest cover mapping Fire detection Weather forecasting Measuring Earth's thermal radiation for atmospheric applications Mission Orbit: Orbit Type: Sun-synchronous Orbit Height: 814 km Inclination: 98.6o Repeat Cycle: 27 days Payload: OLCI (Ocean and Land Colour Instrument) SLSTR (Sea and Land Surface Temperature Radiometer) SRAL (Synthetic Aperture Radar Altimeter) MWR (Microwave Radiometer) DORIS LRR (Laser Retroreflector) GNSS (Global Navigation Satellite System) Resolution and Swath Width: OLCI - 1270 km SLSTR - 1420 km Configuration: In addition to the observation instruments, the Sentinel-3 spacecraft will carry the GNSS (Global Navigation Satellite System) and LRR (Laser Retro Reflector) instruments. GNSS will provide precise orbit determination and can track multiple satellites simultaneously. LRR will be used to accurately locate the satellite in orbit using a laser ranging system. The dimensions of the craft are: 3.7 x 2.2 x 2.2 m with a weight (at time of launch) of 1250 kg. Launch vehicle: Rockot (Sentinel-3A and -3B) Operator: EUMETSAT Contractors: Thales Alenia Space is the prime contractor, responsible for constructing the spacecraft and the SRAL instrument, as well as contributing to the supply of the SLSTR instrument. Many European companies are involved in supplying the SLSTR instrument, including SELEX Galileo, RAL (Rutherford Appleton Laboratory), Jena-Optronik, Thales Alenia Space, ABSL and ESA-ESTEC. EADS CASA Espacio is contracted to provide the MWR instrument. CNES is contracted to provide the DORIS instrument. Eurockot and Arianespace are contracted to launch the spacecraft. language code: en Date=2019-02-22 User Id=mmorahan Entity=WeightedRelation Operation=INSERT System Note=insert WeightedRelation New Value=id: null related concept uuid: d81fc4e3-c0b4-4205-82b2-ef2161c169a3 relationship type: null relationship value: null generated by: null Date=2020-10-07 User Id=mmorahan Entity=AltLabel Operation=INSERT System Note=insert AltLabel New Value=id: null category: primary text: SENTINEL-3A language code: en Date=2019-02-22 User Id=mmorahan Entity=WeightedRelation Operation=INSERT System Note=insert WeightedRelation New Value=id: null related concept uuid: 65ed042c-df53-4afb-8b6a-1ea16958015d relationship type: null relationship value: null generated by: null Mission DetailsLaunch Date:Sentinel-3A - 16 February 2016Sentinel-3B - 25 April 2018Operational lifepsan:7 years (With consumables for 12)Mission objectives:Measuring sea-surface topography, sea-surface height and significant wave heightMeasuring ocean and land-surface temperatureMeasuring ocean and land-surface colourMonitoring sea and land ice topographySea-water quality and pollution monitoringInland water monitoring, including rivers and lakesAid ocean forecasts with acquired dataClimate monitoring and modellingLand-use change monitoringForest cover mappingFire detectionWeather forecastingMeasuring Earth's thermal radiation for atmospheric applicationsMission Orbit:Orbit Type: Sun-synchronousOrbit Height: 814 kmInclination: 98.6oRepeat Cycle: 27 daysPayload:OLCI (Ocean and Land Colour Instrument)SLSTR (Sea and Land Surface Temperature Radiometer)SRAL (Synthetic Aperture Radar Altimeter)MWR (Microwave Radiometer)DORISLRR (Laser Retroreflector)GNSS (Global Navigation Satellite System)Resolution and Swath Width:OLCI - 1270 kmSLSTR - 1420 kmConfiguration:In addition to the observation instruments, the Sentinel-3 spacecraft will carry the GNSS (Global Navigation Satellite System) and LRR (Laser Retro Reflector) instruments. GNSS will provide precise orbit determination and can track multiple satellites simultaneously. LRR will be used to accurately locate the satellite in orbit using a laser ranging system.The dimensions of the craft are: 3.7 x 2.2 x 2.2 m with a weight (at time of launch) of 1250 kg.Launch vehicle: Rockot (Sentinel-3A and -3B)Operator: EUMETSATContractors:Thales Alenia Space is the prime contractor, responsible for constructing the spacecraft and the SRAL instrument, as well as contributing to the supply of the SLSTR instrument.Many European companies are involved in supplying the SLSTR instrument, including SELEX Galileo, RAL (Rutherford Appleton Laboratory), Jena-Optronik, Thales Alenia Space, ABSL and ESA-ESTEC.EADS CASA Espacio is contracted to provide the MWR instrument.CNES is contracted to provide the DORIS instrument.Eurockot and Arianespace are contracted to launch the spacecraft. 2021-01-13 16:24:31.0