mission analysis aspects for earth observations missions

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Limitations for the Acquisition of Optical Image– The spectral observation regions covered by the optical payloads (VIS. IR and UV/Visregions) imply some inherent limitation for the image acquisition: they can only sensethe sunlight part of Earth (except for IR bounds) so that one half of each orbit is usefulfor imagery yielding– The image acquisition for the polar regions during solstices is critical due to the poorillumination condition of the scene: as a result, an optical satellite can only take placesduring, theoretically, less than 40 % of the orbit period in average– The necessity to optimise the illumination condition of the Earth scene drives theselection for optical satellites of near-noon sun-synchronous orbits, since these orbitsprovide sufficient and near constant sun illumination of the Earth surface– The cloud cover is known to be in the order of 30% to 70% of the time at all latitudes,except for very arid climatic zones: this effect further reduces the useful portion of theorbit period for optical satellitesSentinel 2 System – Mission Requirements
Sentinel 2 System – Application RequirementsSentinel -2 – Overall Mission Constraints
Page 1 and 2: ® BuscaLegis.ccj.ufsc.brResponsabi
Page 4 and 5: Right Ascension of the Ascending No
Page 6 and 7: MANOEUVERS (2)EXAMPLESDelta V Delta
Page 8 and 9: From User to the Spacecraft and bac
Page 10 and 11: Typical Revisit Time vs Spatial Res
Page 12 and 13: Elliptical Orbits- Elliptical orbit
Page 14 and 15: Selection of I and D for the Observ
Page 18 and 19: Sentinel -2Spectral Bands vs Spatia
Page 20 and 21: Selecting the Local Time #1- Based
Page 22 and 23: Sentinel -2 ServicesGeneral service
Page 24 and 25: SAR System Design Considerations #1
Page 26 and 27: Case Study: Sentinel-1 Performance
Page 28 and 29: Summary of the Level 2 productPerfo

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