Sensitivity study for the trace gases retrieval

Report on the sensitivity study for the trace gases retrieval description of the best options to be consideredSensitivity studies will be performed by considering 1 different sizes and shapes solar occultation or scattering properties nadir for the dust and cloud grains use of LIDORT and VLIDORT2 different a priori knowledge on the vertical distribution of the dust 3 different a priori knowledge on the vertical temperature profiles A priori data will be provided by the GEMMars GCM Task 544 direct retrieval of temperature from the spectra for NOMAD solar occultation and SPICAMUV stellar occultation only Temperature retrieval will be performed using the hydrostatic law on CO2 abundances as was done for SOIR 119 or directly from the absorption features and their dependence on temperature new method which will require development and testing of the retrieval code Retrieved values will be compared to the a priori knowledge and independent data provided by other instrumentsmissions Following the results of the sensitivity study the best options will be selected to analyse the full SPICAM and NOMAD data sets