ALOS Data Users Handbook

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Section 5 ALOS Mission OperationsTable 5.7-1 Nominal Orbit Maneuver PlanItemAltitudeManeuverInclinationManeuverRequestedΔV(m/s)Numberof StagesRequestedTime/1 StageFrequency4.32 2 for each 5 - 10s As needed10.7 13 500s Once /5 yearsRemarksOrbit position to perform maneuver dependson a vector of eccentricity.At two positions 180 degrees away, it will bedone nominally.At ascending node not depending on sunlightcondition, it will be done basically.Operation modes of each sensor during maneuvers are specified in Table 3.6-3.5.8 ALOS Observation Scenario 1ALOS is one of the largest earth observation satellites in the world. Its purposes are a global monitoring,cartography, regional observation, disaster monitoring, resources surveying, and technology development bycollecting globally land observation data with high resolution. A lot of observation requests are suggested byEarth Remote Sensing Data Analysis Center (ERSDAC), Geographical Survey Institute, ALOS data nodeorganizations and JAXA to achieve the mission above. Other many observation proposals in the area of Japanand its neighborhood are produced by Agriculture, Forestry and Fisheries Ministry, Ministry of theEnvironment and Japan Coast Guard. The requests selected from the first Research Announcement conductedby JAXA/EORC play a very large part in ALOS observation requests at present.Basic observation scenario is established as a joint observation plan, which aims to reduce a whole request bychoosing a common mode meeting many user’s requests and by conducting a joint observation and toimprove the achievement of the requests.To satisfy the many users’ requests, provision of systematic and regionally consistent data observations overall land areas on a repetitive basis is an explicit objective. Based on this concept, global observations 2-3times/year are planned with PALSAR high resolution mode, 1 time/year in ScanSAR mode, and 1 time/yearwith PRISM and AVNIR-2, respectively. Special observation plans apply to Japan and some other specificareas. Basic concepts, observation frequency, and observation areas of the scenario are summarized in thefollowing tables.1 Refer to http://www.eorc.jaxa.jp/ALOS/obs/overview.htm for details.5-12
ALOS Data Users HandbookTable 5.8-1 ALOS Basic Observation Scenario (World)Sensor Area Frequency Mode Basic conceptsPALSAR(Ascending)Global 2 times/year1 time/yearFBD (HH+HV, 41.5)FBS (HH, 41.5)* Global monitoring, Forest monitoring* Two consecutive cycles(*1) are required for InSAR.* Forest monitoring, Resource surveyingSelected 1 time/2 years Polarimetry (21.5) * Pol-InSAR campaigns every 2 yearsareasSelected 7 times/2 years FBS (HH, 41.5) & * Crustal deformation monitoringareasFBD (HH+HV, 41.5)PALSAR Global 1 time/year ScanSAR (HH, * Global monitoring(Descending)5-beam)SelectedareasIrregular FBS (HH, 34.3) * Crustal deformation monitoring* To maintain continuity with JERS-1* 34.3 deg. default angle selected for optimalWetlandfocusareas8 times during12 monthsScanSAR (HH,5-beam)radiometric performance* Wetlands monitoringPRISM Global 1 time/year Triplet mode * Cloud probabilities data are considered for eacharea(*2).* Two observations by +/-1.5 deg. pointing angle arenecessary for obtaining full regional coverage.AVNIR-2 Global 1 time/year Nadir * Cloud probabilities data are considered for eacharea(*2).PALSAR+AVNIR-2Selectedareas1 time/year FBS (HH, 34.3) & 34.3 * PALSAR and AVNIR-2 simultaneous observations at34.3 deg.Table 5.8-2 ALOS Basic Observation Scenario (Japan)Sensor Area Frequency Mode Basic conceptsPALSAR(Ascending)Japan 6 times/2 years FBD (HH+HV, 41.5)5 times/2 years FBS (HH, 41.5)* Two consecutive cycles(*1) are required for InSAR.* Forest monitoring, Crustal deformation monitoring* Crustal deformation monitoring, Resource surveying1 time/2 years Polarimetry (21.5) * Pol-InSAR campaigns every 2 yearsPALSAR Japan 1 time/year ScanSAR (HH, * Global monitoring(Descending)EastJapan3 times/year5-beam)ScanSAR (HH,5-beam)* Sea ice monitoring3 times/year FBS (HH, 41.5) * Crustal deformation monitoringPRISM Japan 3.5 times/year Triplet mode * Cloud probabilities data are considered for eacharea(*2).* Two observations by +/-1.5 deg. pointing angle arenecessary for obtaining full regional coverage.AVNIR-2 Japan 7 times/year Nadir * Cloud probabilities data are considered for eacharea(*2).PALSAR+AVNIR-2Japan 1 time/year FBS (HH, 41.5) & 41.5 * PALSAR and AVNIR-2 simultaneous observations at41.5 deg.5-13
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ALOS Data Users HandbookSection 8 D
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ALOS Data Users Handbook8.5 Outline
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ALOS Data Users HandbookALOS Centra
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ALOS Data Users Handbook8.7.3 NOTES
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APPENDIXALOS Data Users Handbook
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Appendix 1 Acronyms and Abbreviatio
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ALOS Data Users HandbookAppendix 2
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