This page contains a few applications using 4A/OP. 4A/OP processing is controlled by a set of global variables that identify required input data files and a file of run parameters. The user defines these variables through a script file or a Graphical User Interface (GUI).
- Input data include algorithm fixed and user data.
Algorithm fixed input data provide information for:
- Optical thickness atlases
- Reference thermodynamical parameters used for the computation of atlases
- Default gas mixing ratio
User input data are:
- Atmospheric profiles (on user-defined pressure levels)
- Instrumental functions if it is necessary
Interferometer / spectrometer examples
- Simulation definition parameters
- Spectral conditions
- Observation configuration
- Output data depend on the simulation case.
- High resolution spectra (radiances and brightness temperatures)
- Convolved spectra (radiances and brightness temperatures)
- Jacobians on user-defined pressure layers (partial derivatives of the radiance with respect to the temperature, the gas mixing ratio and the surface emissivity)
- Transmittances on user-defined pressure layers
The examples provide illustrations of both the input and output files. See the content of each input file for a description of simulation definition parameters. We present several examples of how to use 4A/OP.