***** PFS Unbinned Retrievals ***** The file "PFS_dataset_20793.nc" (1.0 GB) contains unbinned quantities retrieved from PFS nadir-geometry spectra in NetCDF format. ***PRELIMINARY VERSION*** ***REDUCED DATASET (QF=1)*** This file will be costantly updated as new PFS observations will be available and new retrievals will be performed. The current release contains retrievals from Ls=331.18° of MY 26 to Ls=218.66° of MY 35 (from MEx orbit 00010 to 20793) Retrieved values using nadir spectra: surface temperature, atmospheric temperature (on a fixed pressure grid), integrated dust optical depth at 1075 cm-1, integrated ice optical depth at 825 cm-1 The PFS temperature profiles are retrieved at the following pressures (61 levels): P(mbar) = [0.0101700, 0.0133300, 0.0172300, 0.0219700, 0.0276900, 0.0345100, 0.0425700, 0.0520300, 0.0630500, 0.0757900, 0.0904500, 0.107200, 0.126300, 0.147800, 0.172100, 0.199400, 0.229900, 0.264000, 0.301800, 0.343600, 0.389900, 0.440900, 0.496900, 0.558500, 0.625900, 0.699600, 0.780000, 0.867700, 0.963200, 1.06700, 1.18000, 1.30200, 1.43500, 1.57800, 1.73400, 1.90200, 2.08300, 2.28000, 2.49200, 2.72100, 2.96800, 3.23500, 3.52300, 3.83400, 4.17000, 4.53200, 4.92300, 5.34600, 5.80200, 6.00000, 6.29500, 6.82700, 7.40300, 8.02600, 8.70100, 9.43100, 10.2200, 10.900, 11.600, 12.300, 13.00] Estimated uncertainty for retrieved quantities: Atmospheric temperatures: +/- 1 K for mid heights (10–30 km) +/- 1-4 K for lower and higher heights Dust opacity: “warm regime” (Tsurf >= 220 K): +/- 0.02–0.06 "cold regime" (Tsurf < 220 K): +/- 0.11 Ice opacity: “warm regime” (Tsurf >= 210 K): +/- 0.01 "cold regime" (Tsurf < 210 K): +/- 0.06 ***************************************************** Lists of variables and attributes in the NetCDF file: ***************************************************** PFS_dataset_20793.nc # dimensions: 2 # Variables: 19 # Global attributes: 9 The unlimited dimension is 1 Dimensions 0 Name: P_layer Size: 61 1 Name: N_Meas Size: 1590000 Global Attributes 0 Title: PFS MEX Retrievals (QF=1) 1 Version: v0.1 2 Mission: MARS-EXPRESS 3 Content: PFS unbinned retrievals from Ls=331.18° of MY 26 to Ls=218.66° of MY 35 (from MEx orbit 00010 to 20793) 4 Description: Please, read the accompanying file "PFS_Dataset_Description.txt" for a description of this dataset 5 EULA: The End-User License Agreement (EULA) is provided in the accompanying file "PFS_Dataset_EULA.txt" 6 Author: Marco Giuranna 7 email: marco.giuranna@inaf.it 8 Institution: INAF-IAPS Variables and attributes 0 Temperature: FLOAT(61,1590000) = FLOAT(P_layer,N_Meas) 0 long_name: Retrieved atmospheric temperature profiles 1 short_name: T 2 notes: The atmospheric temperatures are retrieved on a fix Pressure grid. NaN values are used when pressure values correspond to altitudes "below" the surface 3 units: K 1 Pressures: FLOAT(61) = FLOAT(P_layer) 0 long_name: Pressure grid used in all retrievals 1 short_name: P 2 units: mbar 2 Altitude: FLOAT(61,1590000) = FLOAT(P_layer,N_Meas) 0 long_name: Altitude profiles of retrieved atmospheric temperatures 1 short_name: H 2 units: km 3 notes: From local surface -> min value = 0. Values of "-100" are used for altitudes "below" the surface 3 orbit_number: FLOAT(1590000) = FLOAT(N_Meas) 0 long_name: MEx orbit Number 1 short_name: Otbit 4 p_surf: FLOAT(1590000) = FLOAT(N_Meas) 0 long_name: Surface pressure 1 short_name: Psurf 2 units: mbar 3 notes: From MCD v5.2 5 T_surf: FLOAT(1590000) = FLOAT(N_Meas) 0 long_name: Retrieved Surface Temperature 1 short_name: Tsurf 2 units: K 6 h_surf: FLOAT(1590000) = FLOAT(N_Meas) 0 long_name: Surface altitude wrt Mars aeroid 1 short_name: Hsurf 2 units: m 3 notes: MOLA data uses an aeroid, or “sea level” measurement as a zero point, and the altitude data is measured up and down from that level 7 dust: FLOAT(1590000) = FLOAT(N_Meas) 0 long_name: Retrieved dust opacity (column) 1 short_name: tau_dust 2 notes: Coulmn dust optical depth at 1075 cm-1 8 dust_norm: FLOAT(1590000) = FLOAT(N_Meas) 0 long_name: Retrieved NORMALIZED dust opacity (column) 1 short_name: tau_dust_norm 2 notes: Coulmn dust optical depth at 1075 cm-1, normalised to Psurf = 6.1 mbar 9 ice: FLOAT(1590000) = FLOAT(N_Meas) 0 long_name: Retrieved ice opacity (column) 1 short_name: tau_ice 2 notes: Coulmn ice optical depth at 825 c 10 lat: FLOAT(1590000) = FLOAT(N_Meas) 0 long_name: Latitude 1 short_name: Lat 2 units: degrees 3 valid_range: -90.0000 3 valid_range: 90.0000 4 notes: [-90°, +90°] 11 lon: FLOAT(1590000) = FLOAT(N_Meas) 0 long_name: East Longitude 1 short_name: Lon 2 units: degrees 3 valid_range: -180.000 3 valid_range: 180.000 4 notes: East Longitude, [-180°, +180°] 12 loct: FLOAT(1590000) = FLOAT(N_Meas) 0 long_name: Local Solar Time 1 short_name: LST 2 units: hours 3 valid_range: 0.000000 3 valid_range: 24.0000 4 notes: Local Solar Time, [0h, 24h], at observed longitude and ephemeris epoch calculated through SPICE (CSPICE_ET2LST) 13 ls: FLOAT(1590000) = FLOAT(N_Meas) 0 long_name: Solar Longitude 1 short_name: Ls 2 units: degrees 3 valid_range: 0.000000 3 valid_range: 360.000 4 notes: Mars Solar Longitude (season), [0°, 360°] 14 ls_MY: FLOAT(1590000) = FLOAT(N_Meas) 0 long_name: Incremental Solar Longitude 1 short_name: Ls_MY 2 units: degrees 3 notes: 0-360 are from MY 26; 360-360*2 are from MY 27; ... ; 360*8-360*9 are from MY 34 15 incidence_angle: FLOAT(1590000) = FLOAT(N_Meas) 0 long_name: Solar Incidence Angle 1 short_name: IncAng 2 units: degree 3 valid_range: 0.000000 3 valid_range: 180.000 4 notes: This is the angle between the Sun and a "normal" drawn perpendicular to the surface of the planet 16 emission_angle: FLOAT(1590000) = FLOAT(N_Meas) 0 long_name: Emission Angle 1 short_name: EmAng 2 units: degree 3 valid_range: 0.000000 3 valid_range: 90.0000 4 notes: This is the angle between PFS boresight and a "normal" drawn perpendicular to surface of the planet. When PFS is looking straight down ("nadir"), the emission angle is 0° 17 SCET: FLOAT(1590000) = FLOAT(N_Meas) 0 long_name: Unique ID to identify a specific PFS measurement 1 short_name: SCET 18 quality_factor: FLOAT(1590000) = FLOAT(N_Meas) 0 long_name: Quality Factor 1 short_name: QF 2 notes: Quality Factor: 1 = good; 2 = warning (check manually); 3 = bad. Only retrievals with QF = 1 are provided in this initial release. The full dataset including retrievals with QF =2 and QF =3 might be obtained by request. Please contact the PFS PI at the following address: marco.giuranna@inaf.it Appropriate references for these data are: Giuranna, M., Wolkenberg, P., Grassi, D., Aronica, A., Aoki, S., Scaccabarozzi, D., Saggin, B., Formisano, V., The current weather and climate of Mars: 12 years of atmospheric monitoring by the Planetary Fourier Spectrometer on Mars Express. Icartus, 353, 113406 (2019). https://doi.org/10.1016/j.icarus.2019.113406 (for temperature, dust, and ice retrievals) P. Wolkenberg, M. Giuranna, D. Grassi, A. Aronica, S. Aoki, D. Scaccabarozzi, B. Saggin, Characterization of dust activity on Mars from MY27 to MY32 by PFS-MEX observations, Icarus, 310, 32-47 (2018). https://doi.org/10.1016/j.icarus.2017.10.045 (for dust retrieval, and updated retrieval algorithm) Grassi, D., Ignatiev, N. I., Zasova, L. V., Maturilli, A., Formisano, V., Bianchini, G. A., Giuranna, M., Methods for the analysis of data from the Planetary Fourier Spectrometer on the Mars Express Mission, Planet. Space Sci., Volume 53, Issue 10, p. 1017-1034 (2005). (for original retrieval algorithm) Marco Giuranna Istituto Nazionale di AstroFisica Istituto di Astrofisica e Planetologia Spaziali marco.giuranna@inaf.it IAPS Istituto di Astrofisica e Planetologia Spaziali INAF Istituto Nazionale di AstroFisica Via del Fosso del Cavaliere, 100 - 00133 Rome, Italy Phone: +39 06 45488 154 Skype: giuranna.marco ORCID 0000-0001-8967-9184