Level_2A_Opt_MDSR_02_02

binary record	size: 12
ENVISAT binary datetime id field name definition 0 days binary int32 size: 4 days since January 1st, 2000 (may be negative) unit: "days since 2000-01-01" 1 seconds binary uint32 size: 4 seconds since start of day unit: "s" 2 microseconds binary uint32 size: 4 microseconds since start of second unit: "1e-6 s"

binary uint8	size: 1
Positive integer number for the current L1 measurement between 0 and M_Meas pointing to the Opt profile. Zero indicates the L1 measurement was not used ; a number between 1 and N_Obs_Actual points to a set of Opt profiles

binary uint16	size: 2
Relative weight (positive integer number between 0 and 1000) of the current L1 measurement making up the observation indicated by L1_Measurement_Used

binary record

size: 2164

Structure containing all the information related to the sets of optical profiles associated to the current observation id field name definition 0 algorithm ascii string size: 3 String (3 capital characters) indicating which algorithm was used for the derivation of the present profile. The string must not contain any national character. If none of the possible algorithm has been able to produce a profile, the string is "XXX" 1 prof_type binary uint8 size: 1 Defines whether this observation was classified as cloud, no cloud. 0: no profile, 1: clear, 2: cloudy 2 height_bin_opt binary array[24] size: 2160 binary record size: 90 Structure containing 24 sub-structures with all the information pertaining to the 24 possible height bins of the profile id field name definition 0 validity_flag binary uint8 size: 1 Validity flag (1 or TRUE = valid, 0 or FALSE = unvalid) attached to the reported optical parameters 1 reference_pressure binary uint32 size: 4 Reference pressure used for predicting the Rayleigh return and cross-talk between Mie and Rayleigh unit: "Pa" 2 reference_temperature binary uint16 (double) size: 2 Reference temperature used for predicting the Rayleigh return and cross-talk between Mie and Rayleigh unit: "1e-2 K" converted unit: "K" (multiply by 1/100) 3 reference_hlos_wind binary int16 size: 2 Reference Hlos wind (in m/s) used for predicting the Rayleigh return and cross-talk between Mie and Rayleigh (rounded to the nearest integer). At the present, all options are opened. The information could come from met data, HLOS velocities measured by ADM, or a constant velocity (0 m/s). The prototype/first version of the operational code of the L2A uses the last option unit: "m/s" 4 opt_mol_bck binary double size: 8 Molecular backscatter 1e-6 m-1sr-1 and rounded to the nearest integer unit: "1e-6/m/sr" 5 opt_aer_bck binary double size: 8 Aerosol backscatter 1e-6 m-1sr-1 and rounded to the nearest integer unit: "1e-6/m/sr" 6 opt_mol_ext binary double size: 8 Molecular extinction 1e-6 m-1 and rounded to the nearest integer unit: "1e-6/m" 7 opt_aer_ext binary double size: 8 Aerosol extinction 1e-6 m-1 and rounded to the nearest integer unit: "1e-6/m" 8 scat_ratio binary uint32 size: 4 Scattering ratio = aerosol backscatter / molecular backscatter in units of 1e-6 unit: "1e-6" 9 comp_aer_ext_to_bck binary uint8 size: 1 Flag indicating whether the aerosol extinction to backscatter ratio is computed or taken from the aerosol extinction to backscatter ratio data base (1 or TRUE = computed, 0 or FALSE = from database) 10 aer_ext_to_bck binary uint16 size: 2 Aerosol extinction to backscatter ratio in units of 1e-6/sr rounded to the nearest integer unit: "1e-6/sr" 11 opt_mol_bck_err binary double size: 8 Error quantifier for the molecular backscatter unit: "1e-6/m/sr" 12 opt_aer_bck_err binary double size: 8 Error quantifier for the aerosol backscatter unit: "1e-6/m/sr" 13 opt_mol_ext_err binary double size: 8 Error quantifier for the molecular extinction unit: "1e-6/m" 14 opt_aer_ext_err binary double size: 8 Error quantifier for the aerosol extinction unit: "1e-6/m" 15 scat_ratio_err binary uint32 size: 4 Error quantifier for the scattering ratio unit: "1e-6" 16 aer_ext_to_bck_err binary uint16 size: 2 Error quantifier for the aerosol extinction to backscatter ratio unit: "1e-6/sr" 17 integration_length binary uint32 size: 4 Integration length for the reported Mie height bin wind unit: "m"