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user_area:fluorescence_explorer_flex [2013/10/15 19:20]
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user_area:fluorescence_explorer_flex [2013/10/16 08:55]
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| ====== FLuorescence EXplorer simulation ====== | ====== FLuorescence EXplorer ====== |
| The FLuorescence EXplorer (FLEX) mission is devoted to monitor the | The FLuorescence EXplorer (FLEX) mission is devoted to monitor the |
| photosynthetic activity of the terrestrial vegetation layer((M. Drusch | photosynthetic activity of the terrestrial vegetation layer((M. Drusch |
| included in the simulation. | included in the simulation. |
| |
| ===== Spectral resolution ===== | ====== Spectral resolution ====== |
| The key instrument for the FLEX mission is the FLuORescence Imaging | The key instrument for the FLEX mission is the FLuORescence Imaging |
| Spectrometer (FLORIS). It is planned to measure at 0.3~nm spectral | Spectrometer (FLORIS). It is planned to measure at 0.3~nm spectral |
| not have to be included if ''raman'' is specified. | not have to be included if ''raman'' is specified. |
| |
| ===== O2-A and B band absorption ===== | ====== O2-A and B band absorption ====== |
| High resolution absorption cross sections of the appropriate gases are | High resolution absorption cross sections of the appropriate gases are |
| needed in the spectral region of interest. Here we use the | needed in the spectral region of interest. Here we use the |
| mol_tau_file abs ./UVSPEC_FLUORESCENCE_arts-640-810.nc | mol_tau_file abs ./UVSPEC_FLUORESCENCE_arts-640-810.nc |
| |
| ===== Atmosphere ===== | ====== Atmosphere ====== |
| The atmosphere density file must contain the same information for both | The atmosphere density file must contain the same information for both |
| arts and uvspec. That is, the same molecular gas densities at the same | arts and uvspec. That is, the same molecular gas densities at the same |
| atmosphere_file ./afglms_95.dat | atmosphere_file ./afglms_95.dat |
| |
| ===== Surface input ===== | ====== Surface input ====== |
| For the surface the surface albedo and the flourescence must be | For the surface the surface albedo and the flourescence must be |
| specified. We use spectral data from the ESA-FLUSS project((see also Miller, | specified. We use spectral data from the ESA-FLUSS project((see also Miller, |
| albedo_file ./UVSPEC_FLUORESCENCE.TOC | albedo_file ./UVSPEC_FLUORESCENCE.TOC |
| |
| ===== Geometry ===== | ====== Geometry ====== |
| The solar zenith angle must be specified. This should equal the solar | The solar zenith angle must be specified. This should equal the solar |
| zenith angle used to calculate the fluorescence and surface albedo | zenith angle used to calculate the fluorescence and surface albedo |
| zout toa # top of atmosphere | zout toa # top of atmosphere |
| |
| ===== Rotational Raman scattering ===== | ====== Rotational Raman scattering ====== |
| Rotational Raman scattering may be included by adding the following | Rotational Raman scattering may be included by adding the following |
| line. Note that this will increase the computing time by about a | line. Note that this will increase the computing time by about a |
| #raman # Uncomment to include rotational Raman scattering. | #raman # Uncomment to include rotational Raman scattering. |
| |
| ===== Miscellanoues ===== | ====== Miscellanoues ====== |
| In addition to the above input we need to specify where uvspec may | In addition to the above input we need to specify where uvspec may |
| find additional data files, what radiative transfer solver to use | find additional data files, what radiative transfer solver to use |
| quiet # Turn of messages. | quiet # Turn of messages. |
| |
| ===== Complete uvspec input file ===== | ====== Complete uvspec input file ====== |
| With all this in place the complete uvspec input file is (with some | With all this in place the complete uvspec input file is (with some |
| comments included) | comments included) |
| </code> | </code> |
| |
| ===== Clouds and aerosols ===== | ====== Clouds and aerosols ====== |
| No aerosol nor liquid water and ice clouds are included in this | No aerosol nor liquid water and ice clouds are included in this |
| examples. These may be included as described in the | examples. These may be included as described in the |
| Guide]]. | Guide]]. |
| |
| ===== Note on input directory and file names ===== | ====== Note on input directory and file names ====== |
| Note that the input file contains references to other files with input | Note that the input file contains references to other files with input |
| data. The file path to these files must be correctly set in order to | data. The file path to these files must be correctly set in order to |
| run this example. As the paths are set they reflect my setup. | run this example. As the paths are set they reflect my setup. |
| |
| ===== Results ===== | ====== Results ====== |
| uvspec is run with the following command (assuming the input is stored | uvspec is run with the following command (assuming the input is stored |
| in the file ''UVSPEC_FLUORESCENCE.INP'') | in the file ''UVSPEC_FLUORESCENCE.INP'') |
| {{:user_area:fluorescence_explorer_flex:toa_fi_02b.png?600|}} | {{:user_area:fluorescence_explorer_flex:toa_fi_02b.png?600|}} |
| |
| ===== Input files ===== | ====== Input files ====== |
| The various input and output files discussed above are available as a | The various input and output files discussed above are available as a |
| gzipped tar ball | gzipped tar ball |
| {{:user_area:fluorescence_explorer_flex:flex_example.tgz|}}. | {{:user_area:fluorescence_explorer_flex:flex_example.tgz|}}. |
| |
