This dataset is presented in "Ozone observed by TGO/NOMAD-UVIS solar occultation: an inter-comparison of three retrieval methods" by A. Piccialli, A.C. Vandaele, et al. 2023.: https://doi.org/10.1029/2022EA002429)
Each file name indicates the retrieval method:
- FOEM: Full occultation Optimal Estimation Method
- OP: Onion Peeling
- DOP: Direct Onion Peeling
Files are in the HDF5 format. Each file contains:
Geometry:
- LST = local solar time [hrs]
- Ls = solar longitude [degree]
- lat = latitude [degree]
- lon = longitude [degree]
- orbit = file name of each occultation
- day = day of observation
- month = month of observation
- year = year of observation
Science
- For each entry: [number of columns = number of occultations analyzed, number of rows = 600 (altitude grid)]
- Nd_O3 = ozone number density [cm-3]
- Nd_O3_Err = error on ozone number density [cm-3]
- z = altitude above aeroid [km]
Filtering (present only if relevant to the method):
- DoF = Degree of Freedom
- DL = detection limit [cm-3]
- chi2_O3 = chi2 of the retrieval including ozone
- chi2_no_O3 = chi2 of the retrieval without ozone
The filtering criteria Delta_chi2 described in our paper is derived as:
- Delta_chi2 = chi2_no_O3/chi2_O3
