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requirementstable 2008/05/16 08:41 requirementstable 2008/06/13 15:03 current
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This table shows the reviewed ESA missions. More details are given in {{:rt_requirements.pdf|WP1200 report}}. The table summarizes the objectives of the missions and provides information about required forward modeling capabilities. Most of the information has been obtained from ESA's website: http://www.esa.int This table shows the reviewed ESA missions. More details are given in {{:rt_requirements.pdf|WP1200 report}}. The table summarizes the objectives of the missions and provides information about required forward modeling capabilities. Most of the information has been obtained from ESA's website: http://www.esa.int
 +There is also a table showing the [[requirements_matrix|requirements and missions in a matrix structure]].
===== Envisat ===== ===== Envisat =====
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^instrument^objective^measured quantities^instrumentation^FM requirements^ ^instrument^objective^measured quantities^instrumentation^FM requirements^
|ASAR| measure surface topography and ocean currents  | reflected radar pulses from surface  | Microwave radar: C-band, with choice of 5 polarisation modes | retrieval based on Doppler shift, no radiative transfer required in standard retrieval method; RT useful for error analysis  | |ASAR| measure surface topography and ocean currents  | reflected radar pulses from surface  | Microwave radar: C-band, with choice of 5 polarisation modes | retrieval based on Doppler shift, no radiative transfer required in standard retrieval method; RT useful for error analysis  |
-|MERIS| measure atmosphere and surface properties  | cloud optical depth, cloud top height, water vapor column, surface vegetation, ocean (biology and color)  |  medium-spectral resolution, imaging spectrometer, solar spectral range  | detailed RT models required (BRDFs, clouds, aerosols, ...)  |  +|MERIS| measure atmosphere and surface properties  | cloud optical depth, cloud top height, water vapor column, surface vegetation, ocean (biology and color)  |  medium-spectral resolution, imaging spectrometer, solar spectral range  | detailed RT models required (BRDFs, clouds, aerosols, ...), RT in water
|AATSR| measure atmosphere and surface properties  | sea and land surface temperature, cloud properties, vegetation quantity and quality  | reflected and emitted radiation at 0.55 µm, 0.66 µm, 0.87 µm, 1.6 µm, 3.7 µm, 11 µm and 12 µm  | solar and thermal radiances (correlated-k)  | |AATSR| measure atmosphere and surface properties  | sea and land surface temperature, cloud properties, vegetation quantity and quality  | reflected and emitted radiation at 0.55 µm, 0.66 µm, 0.87 µm, 1.6 µm, 3.7 µm, 11 µm and 12 µm  | solar and thermal radiances (correlated-k)  |
|RA-2 | improve knowledge of topography | surface altitude |  nadir-looking pulse-limited radar altimeter at 13.575 GHz  |retrieval based on time shift of radar echo, no radiative transfer required | |RA-2 | improve knowledge of topography | surface altitude |  nadir-looking pulse-limited radar altimeter at 13.575 GHz  |retrieval based on time shift of radar echo, no radiative transfer required |
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Several instruments for remote sensing of Venus and Mars are used, that are also used for remote sensing of the Earth. The requirements for radiative transfer modeling are similar. The major difference is, that the atmospheric composition is completely different on Venus and on Mars. Realistic assumptions are needed for appropriate simulations. Several instruments for remote sensing of Venus and Mars are used, that are also used for remote sensing of the Earth. The requirements for radiative transfer modeling are similar. The major difference is, that the atmospheric composition is completely different on Venus and on Mars. Realistic assumptions are needed for appropriate simulations.
-The following web-sites include required information about the instrumentation of the missions. The instruments that require radiative transfer modeling are listed in the report. +The following web-sites include required information about the instrumentation of the missions. The instruments that require radiative transfer modeling are listed in {{:rt_requirements.pdf|WP1200 report}}.
http://www.esa.int/SPECIALS/Mars_Express/ http://www.esa.int/SPECIALS/Mars_Express/
 
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