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/a1498dff-002d-4d67-9091-16822c608221 ENVISAT Date=2016-06-09 User Id=epneff Entity=AltLabel Operation=INSERT User Note=added altLabel System Note=insert AltLabel New Value=id: null text: Envisat language code: en Date=2019-02-15 User Id=mmorahan Entity=Definition Operation=UPDATE Field=reference System Note=update Definition New Value=http://fedeo.spacebel.be/thesaurus/en/page/envisat Date=2020-06-24 User Id=mmorahan Entity=WeightedRelation Operation=INSERT System Note=insert WeightedRelation New Value=id: null related concept uuid: 24536b41-a968-4626-9516-7cf4c158334c relationship type: null relationship value: null generated by: null Date=2019-02-15 User Id=mmorahan Entity=Resource Operation=UPDATE Field=type System Note=update Resource Old Value=IMAGE New Value=image ENVISAT was successfully launched on March 1, 2002 from Kourou, FrenchGuiana on Europe's Ariane 5 launcher.The ENVIronmental SATellite (ENVISAT) is an element of the EuropeanSpace Agency (ESA) Columbus Programme. The ENVISAT satellite is partof the International Earth Observation System (IEOS). The ENVISAT isdesigned to study Earth's resources and to contribute to the study ofland surface properties, atmospheric chemistry, aerosol distribution,ocean and ice processes, and marine biology. The ENVISAT spacecraftis based on the Polar Platform (PPF) concept and consists of a ServiceModule (SM) which provides main support functions, and amission-specific Payload Module (PLM) which provides the instrumentsand payload support functions. The Payload Module consists of thePayload Equipment Bay (PEB) and the Payload Carrier (PLC). The PayloadData Management Subsystem performs instrument and support subsystems,data processing, telecommand and telemetry management, data-buscontrol, failure management, and instrument operations timelinemanagement. Commonad and control is provided by the Payload ModuleComputer (PMC). Scientific data generated from the instruments will beprocessed by the High Speed Multiplexer (HSM) for recording ortransmission to the ground. A set of four tape recorders provide arecording speed of 2 to 4 Mbps and a capacity of 25 Gbits. Thecommunication subsystem uses an x-band link directly to the ground anda Ka-band bi-directional link via ESA's Data Relay Satellite(DRS). The Thermal Control Subsystem consists of a Heater SwitchingUnit (HSU), heaters, thermistors and thermostats. The Service Module(SM) consists of a carbon-fibre-reinforced plastic (CFRP) cone with alauncher interface at one end and a propulsion module at theother. The power subsystem consists of up to eight nickel-cadmiumbatteries (40 Ahr) and a modular solar array. The SM on-board datamanagement is done by the Central Computer Unit (CCU). Command andcontral are done via S-band communications direct to the ground orthrough the DRS. The Attitude and Orbit Control Subsystem (AOCS)provides three-axis stabilization. Altitude measurements will beprovided by digital Sun sensors, Earth-horizon sensors and gyroscopeswhile altitude control will be provided by monopropellentthrusters. Fine pointing is accomplished through star sensors andgyroscopes, reaction wheels, and magneto-torquers.The ENVISAT consists of : (1) Advanced SAR (ASAR), (2) Global OzoneMonitoring by Occultation of Stars (GOMOS), (3) Medium Resolution ImagingSpectrometer (MERIS), (4) Michelson Interferometer for Passive AtmosphericSounding (MIPAS), (5) Radar Altimeter-2 (RA-2), (6) Advanced Along TrackScanning Radiometer (AATSR), (7) Scanning Imaging Absorption Spectrometerfor Atmospheric Cartography (SCIMACHY), (8) Microwave Radiometer (MWR),(9) Doppler Orbitography and Radiopositioning Integrated by Satellite(DORIS), and (10) a Laser Retroreflector (LRR) for tracking.Just weeks after celebrating its tenth year in orbit, communication with the Envisat satellite was suddenly lost on 8 April. Following rigorous attempts to re-establish contact and the investigation of failure scenarios, the end of the mission is being declared.Group: Platform_Details Entry_ID: ENVISAT Group: Platform_Identification Platform_Category: Earth Observation Satellites Short_Name: ENVISAT Long_Name: Environmental Satellite End_Group Group: Platform_Associated_Instruments Short_Name: RA-2 Short_Name: MWR Short_Name: MIPAS Short_Name: MERIS Short_Name: LRR Short_Name: GOMOS Short_Name: DORIS Short_Name: ASAR Short_Name: AATSR End_Group Group: Orbit Orbit_Altitude: 800-km Orbit_Inclination: 98.55 degrees Equator_Crossing: 10 am Local time: e.g. Repeat_Cycle: 35 days Orbit_Type: LEO > LOW EARTH ORBIT > POLAR SUN-SYNCHRONOUS End_Group Creation_Date: 2007-09-20 Online_Resource: http://envisat.esa.int/ Sample_Image: http://www.dutchspace.nl/uploadedImages/Business_Fields/Earth_observation/Envisat/Envisat-in-Orbit-512.jpg Group: Platform_Logistics Launch_Date: 2002-03-01 Launch_Site: KOUROU, FRENCH GUIANA Design_Life: 10 years Primary_Sponsor: European Space Agency End_GroupEnd_Group 2020-06-24 16:25:15.0