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TECHNICALSpotsatellitetechnicaldataAskusfortheEarth1/4SpotsatellitetechnicaldataGeneralfeaturesSPOT5SPOT4SPOT1,2&3SPOT1–February22,1986LaunchdateMay4,2002March24,1998SPOT2–January22,1990SPOT3–September26,1993LaunchvehicleAriane4Ariane2/3Nominallifetime5years3yearsSPOT1–November17,2003SPOT2–July30,2009DeorbitationInorbitInorbitSPOT3–November1996(endoflife)OrbitSun-synchronousLocalEquatorcrossingtime10:30a.m.(descending)AltitudeatEquator822kmInclination98,7°Velocity7.4km/sEarth-pointingandyaw-axisAltitudecontrolcontrolled(tocompensateforEarth-pointingeffectsduetoEarth’srotation)Orbitalperiod101.4minutesOrbitalcycle26daysTotalmass3,000kg2,760kg1,800kgDimensions3.1x3.1x5.7m2x2x5.6m2x2x4.5mSolararray2,400W2,100W1,100W(endoflife)Two120-Gbitsrecordersplus90-Gbitsolid-statememory9-Gbitsolid-statememoryTwo60-Gbitrecorders(~210imageswithanaverage(~280imagesoneachwithanRecordingcapacity(~560imagesoneachrecorderdecompressedfilesize+40images,withanaverageaveragedecompressedfileof144Mb)decompressedfilesizesizeof36Mb)of36Mb)Upto5imagesacquiredTwoimagesacquiredTwoimagesacquiredsimultaneously,2downlinkedsimultaneously,thenOnboardimagesimultaneously,theninrealtimeAND3storeddownlinkedORrecordedusingprocessingdownlinkedORrecordedusingonboardusinga2.6a1.3compressionratio(DPCM,a1.3compressionratio(DPCM)compressionratio(DCT)panchromaticimageryonly)Imagetelemetrylink50Mb/s(8GHz)2x50Mb/s2/4SpotsatellitetechnicaldataHigh-ResolutionInstrumentsSPOT5SPOT4SPOT1,2&3Instruments2HRGs2HRVIRs2HRVs2panchromatic(5m),combinedtogeneratea1panchromatic(10m)Spectralbandsand1panchromatic(10m)2.5-metreproduct3multispectral(20m)resolution3multispectral(20m)3multispectral(10m)1short-waveinfrared(20m)1short-waveinfrared(20m)P:0,48–0.71µmM:0.61–0.68µmP:0.51–0.73µmB1(green):0.50–0.59µmB1(green):0.50–0.59µmB1(green):0.50–0.59µmSpectralrangeB2(red):0.61–0.68µmB2(red):0.61–0.68µmB2(red):0.61–0.68µmB3(NIR):0.78–0.
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