GOM_NL__2P_GADS_summary_quality_v2

binary record ""

size: 153

field name

definition

no_valid

binary uint8	size: 1
No valid data flag. 0 = valid data was found in the Level 0 product; 1 = no valid packets in the Level 0 product.

no_int_stray

binary uint8	size: 1
Internal straylight correction flag. 1 = internal straylight correction was not performed; 0 = internal straylight correction was performed.

no_ext_earth

binary uint8	size: 1
External earth straylight correction flag. 1 = external earth straylight correction was not performed; 0 = otherwise.

no_ext_sun

binary uint8	size: 1
External sun straylight correction flag. 1 = external sun straylight correction was not performed; 0 = otherwise.

no_slit_trans

binary uint8	size: 1
Slit transmission correction flag. 1 = slit transmission correction was not performed; 0 = otherwise.

no_ref_star_comp

binary uint8	size: 1
PCD flag for reference star spectrum computation. 0 = no problem; 1 = the reference star spectrum was computed with a small number of measurements; 2 = no valid measurements in the occultation to compute the reference star spectrum (see ref_star_db and no_ref_star).

ref_star_db

binary uint8	size: 1
PCD flag indicating that the star spectrum has been read from the stellar spectra database. 0 = the reference spectrum is computed from the measurements; 1 = the reference spectrum is read in the database; 2 = the reference spectrum was not found in the stellar spectra data base (see no_ref_star).

no_ref_star

binary uint8	size: 1
PCD flag indicating that the reference star spectrum has not been computed. 1 = the reference star spectrum has not been computed; 0 = the reference star spectrum was computed.

dark_charge_bias

binary uint8

size: 1

PCD flag indicating that the automatic dark charge bias correction has been applied. bit 0: automatic dark charge bias correction activated (1) or not (0) for SPA1. bit 1: automatic dark charge bias correction activated (1) or not (0) for SPA2. bit 2: automatic dark charge bias correction activated (1) or not (0) for SPB1. bit 3: automatic dark charge bias correction activated (1) or not (0) for SPB2.

dark_charge_flag

binary uint8	size: 1
PCD flag for the dark charge computation (photometers). 1 = no DC correction performed; 0 = DC correction performed.

num_sp_err

binary uint32	size: 4
Number of source packets containing errors. This value wil equal the number of Transmission MDSRs with their quality flag set to -1.

lev0_id

binary uint8	size: 1
Level 0 PCD. 0 = standard occultation; 1 = first part of a tangent occultation; 2 = last part of a tangent occultation

atm_type

binary uint8

size: 1

Type of atmosphere file used. 54 = One ECMWF file used. Time recorded is included in the occultation period; 102 = One ECMWF file used. Time recorded before the beginning of the occultation (Delta t <= 24h); 103 = One ECMWF file used. Time recorded after the beginning of the occultation (Delta t <= 24h); 106 = One ECMWF file used. Only one time record in the validity interval (Delta t <= 24h); 155 = Two ECMWF files used; 201 = No ECMWF file available. Use MSIS model alone; 202 = Only old ECMWF files (Delta t >= 24h). Use MSIS model alone; 203 = Only future ECMWF files (Delta t >= 24h). Use MSIS model alone; 206 = No ECMWF file available in the validity interval (Delta t >= 24h). Use MSIS model alone.

dark_charge_info

binary uint8	size: 1
Dark charge correction information. 0 = dark charge map used; 1 = first measurements used; 2 = no dark charge correction applied; 11 = first measurements not available - DC corrections with DC maps; 12 = first measurements not available and missing first packet - DC correction with DC maps without temperature dependence; 21 = dark charge map computed from DSA observation has been used.

dark_limb_cond

binary uint8	size: 1
Dark/bright limb condition. 0 = dark limb; 1 = bright limb.

obs_illum_cond

binary uint8	size: 1
Observation illumination condition. 0 = full dark limb condition; 1 = bright limb condition; 2 = pure twilight condition; 3 = straylight condition; 4 = twilight and straylight condition.

sdp_extract

binary uint32	size: 4
SDP extraction processing. Number of invalid measurements during the occultation.

dat_err

binary uint32	size: 4
Datation errors. Number of measurements where flags were raised to indicate a datation problem occurred.

rt_err

binary uint32	size: 4
Ray tracing errors. Number of measurements with a non-converged ray path.

geo_err

binary uint32	size: 4
Geolocation errors. Number of measurements performed outside the atmosphere, set to 1000 if completely performed outside the atmosphere.

sat_err

binary uint32	size: 4
Saturation errors. Number of measurements containing saturated samples.

cr_err

binary uint32	size: 4
Cosmic ray errors. Number of measurements where cosmic rays have been detected.

mod_corr_err

binary uint32	size: 4
Modulation correction errors. Number of measurements where a modulation correction error has been detected.

vign_err

binary uint32	size: 4
Vignetting correction. Number of measurements where the vignetting correction was applied.

num_cent_back

binary uint32	size: 4
Central Background. Number of measurements where FLAGbg(f) has been raised.

num_flat

binary uint32	size: 4
Flat field correction. Number of measurements where the star falls outside the central band.

num_full_trans_err

binary uint32	size: 4
Full transmission errors. Number of measurements where a problem has been detected during the full transmission computation.

num_bad

binary uint32	size: 4
Bad Pixels. Number of bad pixels per measurement

num_fp_sat

binary array[2]

size: 8

Photometer saturation. Number of photometers saturated samples. First number is for photometer 1 second is for photometer 2

binary uint32 size: 4

back_corr_flag

binary uint8	size: 1
Background correction flag. 0 = no background correction; 1 = background correction applied (linear interpolation); 2 = background correction applied (exponential interpolation); 3 = background correction applied (general method).

spec_eff_sampl_time

binary float	size: 4
Spectrometer effective sampling time. unit: "s"

time_shift_rt

binary float	size: 4
Effective time shift for ray tracing / geolocation. unit: "s"

lev_1b_check

binary uint16	size: 2
Level 1B PCD check. 0 = no unrecoverable errors detected in Level 1B PCD; 1 = no valid data; 2 = second part of a tangent occultation; 3 = geolocation is not valid; 4 = reference star spectra is missing.

nfcr

binary uint16	size: 2
Chromatic refraction mode for the measured transmission. 0 = no correction; 1 = correction is performed.

nfcr20

binary uint16	size: 2
Chromatic refraction mode for transmission model (second spectral inversion). 0 = no correction; 1 = correction is performed.

nfcr21

binary uint16	size: 2
Chromatic refraction mode for transmission model (third and further spectral inversions). 0 = no correction; 1 = correction is performed.

nfi0

binary uint16	size: 2
Instrument function mode for transmission model (second spectral inversion). 0 = no correction; 1 = correction is performed.

alt_uc

binary uint16	size: 2
First altitude where the ratio U/C is greater than 25%. unit: "km"

nfv

binary uint16	size: 2
Vertical inversion mode. 2 = linear mode; no other values.

nfs

binary uint16	size: 2
Smoothing mode (after the spectral inversion). 0 = no smoothing; 1 = Gaussian filter; 2 = Tikhonov's regularisation

nft0

binary uint16	size: 2
Time mode for transmission model (second spectral inversion). 0 = zero order term; 1 = second order term.

nft1

binary uint16	size: 2
Time mode for transmission model (third and further spectral inversions). 0 = zero order term; 1 = second order term.

num_iter_main

binary uint16	size: 2
Number of iterations for main loop

num_iter_inv

binary uint16	size: 2
Number of iterations for inversion loop

num_prof_points

binary uint16	size: 2
Number of points in profile column densities where Chi^2 > Chi^2 (warn)

num_air_col_flags

binary uint16	size: 2
Number of flagged points in profile for air column densities

num_aero_col_flags

binary uint16	size: 2
Number of flagged points in profile for aerosol column densities

num_o3_col_flags

binary uint16	size: 2
Number of flagged points in profile for O3 column densities

num_no2_col_flags

binary uint16	size: 2
Number of flagged points in profile for NO2 column densities

num_no3_col_flags

binary uint16	size: 2
Number of flagged points in profile for NO3 column densities

num_oclo_col_flags

binary uint16	size: 2
Number of flagged points in profile for OClO column densities

num_o2_col_flags

binary uint16	size: 2
Number of flagged points in profile for O2 column densities

num_h2o_col_flags

binary uint16	size: 2
Number of flagged points in profile for H2O column densities

num_air_loc_flags

binary uint16	size: 2
Number of flagged points in profile for air local densities

num_aero_loc_flags

binary uint16	size: 2
Number of flagged points in profile for aerosol local densities

num_o3_loc_flags

binary uint16	size: 2
Number of flagged points in profile for O3 local densities

num_no2_loc_flags

binary uint16	size: 2
Number of flagged points in profile for NO2 local densities

num_no3_loc_flags

binary uint16	size: 2
Number of flagged points in profile for NO3 local densities

num_oclo_loc_flags

binary uint16	size: 2
Number of flagged points in profile for OClO local densities

num_o2_loc_flags

binary uint16	size: 2
Number of flagged points in profile for O2 local densities

num_h2o_loc_flags

binary uint16	size: 2
Number of flagged points in profile for H2O local densities

layer_ratio

binary uint16 (double)	size: 2
Layer ratio used in vertical inversion unit: "1e3" converted unit: "" (multiply by 1/1000)

aerosol_model

binary uint16	size: 2
Aerosol Model

spec_inver_scheme

binary uint16	size: 2
Spectral inversion scheme. 0 = spectral inversion global (no GDI); 1 = spectral inversion global GDI NO2; 2 = spectral inversion global GDI NO2+NO3 (default).

gomos_source_data

binary uint8	size: 1
Source of GOMOS data for GOMOS atmospheric profile. Bit 0 - Rayleigh extinction. Bit 1 - Oxygen absorption from spectrometer B; Bit 2 - Refractive dilution including scintilations; Bit 3 - Time delay between the two photometers; Bit 6 - Rayleigh. Value = 0 disabled, value = 1 enabled.

obliquity

binary float	size: 4
Obliquity of the occultation at 35km altitude.