id | field name | definition |
0 | nfcr |
binary uint8 | size: 1 |
Chromatic refraction mode for the measured transmission. 0 = no correction; 1 = correction performed.
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1 | nfcr2 |
binary array[2] | size: 2 |
Chromatic refraction mode for transmission model. The first parameter is for the second spectral inversion and the second one is for the third and subsequent spectral inversions. 0 = no correction; 1 = correction performed.
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2 | nfi |
binary array[2] | size: 2 |
Instrument function mode for the transmission model. The first parameter is for the second spectral inversion and the second one is for the third and subsequent spectral inversions. 0 = no correction; 1 = correction performed.
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3 | nfv |
binary uint8 | size: 1 |
Vertical inversion mode. 0 = spectrial inversion global (no GDI); 1 = spectral inversion global GDI NO2; 2 = spectral inversion global GDI NO2+NO3 (default)
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4 | nfs |
binary uint8 | size: 1 |
Smoothing mode (after the spectral inversion). 0 = no smoothing; 1 = gaussian filter; 2 = Tikhonov's regularisation.
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5 | nft |
binary array[2] | size: 2 |
Time mode in the transmission model. The first parameter is for the second spectral inversion and the second one is for the third and subsequent spectral inversions. 0 = zero order term; 1 = second order term.
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6 | natm_b |
binary uint8 | size: 1 |
Choice of atmospheric model for SPB (O2 and H2O transmissions). 0 = US 76 standard; 1 = model dependent on season and latitude
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7 | max_obl |
binary float | size: 4 |
Maximum value of the occultation obliquity
unit: "degrees"
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8 | spare_1 |
binary bytes | size: 8 |
Spare
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hidden: true
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9 | id_earth |
binary uint8 | size: 1 |
Identifier of Earth model. 0: WGS84 model.
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10 | f_e |
binary float | size: 4 |
Flattening of the Earth
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11 | a_e |
binary uint32 (double) | size: 4 |
Earth equatorial radius
unit: "m"
converted unit: "m" ()
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12 | delta_h |
binary float | size: 4 |
Atmosphere thickness
unit: "m"
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13 | spare_2 |
binary bytes | size: 8 |
Spare
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hidden: true
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14 | max_dev |
binary uint8 | size: 1 |
Maximum number of iterations for the deviation computation
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15 | thr_dev |
binary float | size: 4 |
Threshold value for the ray deviation computation
unit: "degrees"
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16 | first_alt_rt |
binary float | size: 4 |
First altitude step for the ray tracing
unit: "m"
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17 | alt_step_rt |
binary float | size: 4 |
Altitude step for the ray tracing
unit: "m"
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18 | alt_samp |
binary float | size: 4 |
Altitude sampling for density second derivative calculation
unit: "m"
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19 | max_impact |
binary uint8 | size: 1 |
Maximum number of iterations for impact parameter computation
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20 | prec_impact |
binary float | size: 4 |
Precision for impact parameter computation
unit: "m"
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21 | min_wl_rt |
binary uint32 (double) | size: 4 |
Minimum wavelength value for ray-tracing
unit: "1e-3 nm"
converted unit: "m" (multiply by 1/1000)
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22 | max_wl_rt |
binary uint32 (double) | size: 4 |
Maximum wavelength value for ray-tracing
unit: "1e-3 nm"
converted unit: "m" (multiply by 1/1000)
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23 | spare_3 |
binary bytes | size: 8 |
Spare
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hidden: true
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24 | alt_turb |
binary array[2] | size: 8 |
Altitude range for turbulence fluctuations processing
binary float | size: 4 |
unit: "m"
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25 | corwin |
binary float | size: 4 |
Length of the cross-correlation window
unit: "m"
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26 | spare_4 |
binary bytes | size: 8 |
Spare
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hidden: true
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27 | alt_ref |
binary uint8 | size: 1 |
Number of altitudes for reference line density. Working parameter used to decode the reference line density ADS.
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28 | natm |
binary uint8 | size: 1 |
Choice of atmospheric model for SPA (reference line density). 0 = US 76 standard' 1 = model dependent on latitude and season.
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29 | air_model |
binary uint8 | size: 1 |
Air reference line density computation model. 0 = 'compute from level-1B data'; 1 = 'use atmospheric model selected in preceding field'.
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30 | tot_species_a |
binary uint8 | size: 1 |
Total number of species for spectrometer A
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31 | num_groups_init_a |
binary uint8 | size: 1 |
Number of species groups (initialization phase)
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32 | num_groups |
binary uint8 | size: 1 |
Number of species groups (spectral inversion phase)
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33 | num_alt_win |
binary uint8 | size: 1 |
Number of altitudes for spectral windows
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34 | hanning_cut |
binary float | size: 4 |
Hanning filter cut-off frequency (half extent)
unit: "m"
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35 | time_delay_comp |
binary float | size: 4 |
Time sampling for the time delay computation
unit: "ms"
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36 | air_density |
binary float | size: 4 |
Air number density at sea level
unit: "1/cm3"
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37 | aero_model |
binary uint8 | size: 1 |
Aerosol model selection. 0 = '[1/lambda] model'; 1 = 'polynomial model'.
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38 | aero_model_order |
binary uint8 | size: 1 |
Order of the polynomial aerosol model
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39 | aerosol_mod |
binary array[2] | size: 8 |
Aerosol model coefficients (unit: 1/cm3, -)
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40 | doas_size |
binary uint16 | size: 2 |
DOAS sliding window size in pixels
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41 | max_chi2 |
binary float | size: 4 |
Maximum value of Chi^2 before a warning flag is raised
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42 | num_zones_tik |
binary uint8 | size: 1 |
Number of atmosphere zones per gas for Tikhonov regularization
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43 | altitudes_for_tik |
binary array[10] | size: 40 |
Altitudes for Tikhonov regularisation
binary float | size: 4 |
unit: "m"
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44 | reg_param_air |
binary array[10] | size: 40 |
Regularisation parameter for air
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45 | reg_param_aerosol |
binary array[10] | size: 40 |
Regularisation parameter for aerosol
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46 | reg_param_o3 |
binary array[10] | size: 40 |
Regularisation parameter for O3
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47 | reg_param_no2 |
binary array[10] | size: 40 |
Regularisation parameter for NO2
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48 | reg_param_no3 |
binary array[10] | size: 40 |
Regularisation parameter for NO3
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49 | reg_param_o2 |
binary array[10] | size: 40 |
Regularisation parameter for O2
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50 | reg_param_h2o |
binary array[10] | size: 40 |
Regularisation parameter for H2O
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51 | reg_param_oclo |
binary array[10] | size: 40 |
Regularisation parameter for OClO
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52 | spare_5 |
binary bytes | size: 20 |
Spare
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hidden: true
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53 | turbulence_params |
binary record | size: 40 |
Turbulence parameters
id | field name | definition |
0 | kappa |
binary float | size: 4 |
Threshold value on fluctuations level for turbulent computation
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1 | dt1 |
binary float | size: 4 |
Window width for correlation computation
unit: "ms"
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2 | dtmin |
binary float | size: 4 |
Minimum value for time delay to compute meaningful refractivity
unit: "ms"
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3 | unused_parameters |
binary array[7] | size: 28 |
Unused Parameters
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54 | vert_length_scale |
binary float | size: 4 |
Characteristic vertical length scale: half width at half maximum
unit: "m"
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55 | neg_density_flag |
binary int16 | size: 2 |
Flag for negative densities in LMA. 0 = no; 1 = yes.
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56 | photo_flag |
binary int16 | size: 2 |
Photometer flag. 0 = blue; 1 = red (scintillation processing).
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57 | min_trans |
binary float | size: 4 |
Minimum value for transmission terms
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58 | max_trans |
binary float | size: 4 |
Maximum value for transmission terms
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59 | min_ot |
binary float | size: 4 |
Minimum value for optical thickness
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60 | max_ot |
binary float | size: 4 |
Maximum value for optical thickness
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61 | min_col_den |
binary float | size: 4 |
Minimum value for tangent line densities
unit: "1/cm2"
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62 | max_col_den |
binary float | size: 4 |
Maximum value for tangent line densities
unit: "1/cm2"
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63 | min_loc_den |
binary float | size: 4 |
Minimum value for local densities
unit: "1/cm3"
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64 | max_loc_den |
binary float | size: 4 |
Maximum value for local densities
unit: "1/cm3"
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65 | max_alt_h2o |
binary float | size: 4 |
Maximum altitude for H2O retrieval
unit: "m"
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66 | scale_factor_spectral |
binary int8 | size: 1 |
Scale factor (spectral inversion) for the elements of the covariance matrix written in the level 2 product. The covariance matrix terms are divided by 10^FS before being written into the product.
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67 | scale_factor_vertical |
binary int8 | size: 1 |
Scale factor (vertical inversion) for the elements of the covariance matrix written in the level 2 product. The covariance matrix terms are divided by 10^FVM before being written into the product.
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68 | spare_7 |
binary bytes | size: 16 |
Spare
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hidden: true
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