MIP_PS2_AX_GADS_frame_v3

binary record ""

field name

definition

dsr_time

binary time

size: 12

Time of creation

unit: "s since 2000-01-01"

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"

spec_ev_switch

binary uint8	size: 1
Switch for processing of special events

spare_1

binary bytes	size: 2
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hidden: true

max_path_diff

binary double	size: 8
Maximum optical path difference unit: "cm"

ref_char

binary int8	size: 1
Reference character to be compared with PCD

spike_thresh

binary uint32	size: 4
Threshold of spike location wrt ZPD

spike_thresh_rms

binary double	size: 8
Threshold for maximum rms amplitude of spikes

laser_wvn

binary double	size: 8
Wavenumber of laser unit: "1/cm"

spare_2

binary bytes	size: 4
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hidden: true

num_fr_counts

binary uint32	size: 4
Number of fringe counts valid for nominal measurement at MPD

num_nesr_thresh

binary uint16	size: 2
Number of NESR thresholds

wvn_nesr_thresh1

binary double	size: 8
Wavenumber related to the first NESR threshold unit: "1/cm"

wvn_nesr_thresh2

binary double	size: 8
Wavenumber related to the last NESR threshold unit: "1/cm"

nesr_thresh

binary array[dim_0]

Vector containing NESR thresholds

dim_0: int(../num_nesr_thresh)

binary double size: 8

unit: "W/(cm2.sr.1/cm)"

max_mw

binary uint16	size: 2
Maximum number of microwindows used in retrieval

spare_3

binary bytes	size: 24
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hidden: true

num_modes

binary uint16	size: 2
Number of modes

num_sweeps

binary array[dim_0]

dim_0: int(../num_modes)

binary uint16 size: 2

Number of sweeps characterizing each mode

trop_alt_coeff_a

binary array[dim_0]

dim_0: int(../num_modes)

binary double size: 8

Mode dependent Coefficients A for Tropopause Altitude Correction

unit: "km"

trop_alt_coeff_b

binary array[dim_0]

dim_0: int(../num_modes)

binary double size: 8

Mode dependent Coefficients B for Tropopause Altitude Correction

unit: "km"

trop_alt_coeff_c

binary array[dim_0]

dim_0: int(../num_modes)

binary double size: 8

Mode dependent Coefficients C for Tropopause Altitude Correction

unit: "km"

spec_res_coarse

binary double	size: 8
Spectral resolution of the general coarse wavenumber grid unit: "1/cm"

max_dev

binary double	size: 8
Maximum allowed deviation between input grid and general coarse wavenumber grid unit: "1/cm"

num_sinc

binary uint16	size: 2
Number of sinc interpolation coefficients

num_off

binary int16	size: 2
Number of offsets used for interpolation

num_coef

binary uint16	size: 2
Number of coefficients defining analytical Norton-Beer apodisation function

coef

binary array[dim_0]

Coefficients of analytical Norton-Beer apodisation function

dim_0: int(../num_coef)

binary double size: 8

num_wvn

binary uint16	size: 2
Number of wavenumbers at which the ILS has been characterised

wnm

binary array[dim_0]

Vector containing wavenumbers at which the ILS has been characterised

dim_0: int(../num_wvn)

binary double size: 8

unit: "1/cm"

lin_shear_var

binary array[dim_0]

Vector containing for each wavenumber the linear shear variation along Z vs. OPD

dim_0: int(../num_wvn)

binary double size: 8

unit: "cm"

ir_misalign

binary array[dim_0]

Vector containing for each wavenumber the systematic IR misalignment along Y

dim_0: int(../num_wvn)

binary double size: 8

unit: "rad"

spec_res_fine

binary double	size: 8
Spectral resolution of the general fine wavenumber grid unit: "1/cm"

req_spec_width

binary double	size: 8
Requested spectral width of the AILS in each spectral band unit: "1/cm"

min_res_ails

binary double	size: 8
Required minimum resolution of computed AILS unit: "1/cm"

min_res_opd

binary uint16	size: 2
Minimum resolution of sampling grid in OPD domain unit: "cm"

max_fft

binary uint16	size: 2
Maximum number of FFT samples to be used

min_div_mir

binary double	size: 8
Minimum divergence for which the modulation MIR is computed unit: "degrees"

spare_4

binary bytes	size: 8
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hidden: true

z_ir_misalign

binary double	size: 8
Systematic IR misalignment along Z unit: "rad"

y_lin_shear

binary double	size: 8
Retroreflector linear shear along Y vs. OPD unit: "cm"

y_interfer_div

binary double	size: 8
Interferometer divergence along Y unit: "rad"

z_interfer_div

binary double	size: 8
Interferometer divergence along Z unit: "rad"

laser_misalign_opd_y

binary double	size: 8
Systematic OPD measuring laser misalignment along Y unit: "rad"

laser_misalign_opd_z

binary double	size: 8
Systematic OPD measuring laser misalignment along Z unit: "rad"

lin_shear_var_y

binary double	size: 8
Linear shear variation along Y

lin_shear_z

binary double	size: 8
Retroreflector linear shear along Z

blur_ang_width_y

binary double	size: 8
Blur angular width along Y unit: "rad"

blur_ang_width_z

binary double	size: 8
Blur angular width along Z unit: "rad"

opt_speed_interfer

binary double	size: 8
Optical speed of interferometer unit: "cm/s"

init_perturb

binary double	size: 8
Initial perturbation on sampling of first sample unit: "cm"

time_const_init_perturb

binary double	size: 8
Time constant of exponential attenuation of initial sampling perturbation unit: "s"

rel_speed_fluc

binary double	size: 8
Initial relative speed fluctuation at the beginning of scan

time_const_speed_fluc

binary double	size: 8
Time constant of exponential attenuation of the initial speed fluctuation unit: "s"

gain_slope

binary double	size: 8
Gain slope of electrical response of IR detector and preamplifier

mismatch_delay

binary double	size: 8
Mismatch delay between IR electronics response and ADC trigger unit: "s"

rel_drift_rate

binary double	size: 8
Relative drift rate of laser wavenumber unit: "1/cm"

white_noise_bw

binary double	size: 8
Bandwidth of laser white noise unit: "Hz"

laser_noise_bw

binary double	size: 8
Bandwidth of laser 1/f noise unit: "Hz"

num_samples_y

binary uint16	size: 2
Number of discrete samples of integral approximation along Y

num_samples_z

binary uint16	size: 2
Number of discrete samples of integral approximation along Z

coeff_c

binary double	size: 8
Coefficient C used for ILS/AILS interpolation

coeff_b

binary double	size: 8
Coefficient B used for ILS/AILS interpolation unit: "cm"

coeff_a

binary double	size: 8
Coefficient A used for ILS/AILS interpolation unit: "cm2"

const_spec_corr

binary double	size: 8
Constant spectral correction coefficient of AILS unit: "1/cm"

lin_spec_corr

binary double	size: 8
Linear spectral correction coefficient of AILS

quad_spec_corr

binary double	size: 8
Quadratic spectral correction coefficient of AILS unit: "cm"

interp_flag

binary uint16	size: 2
Flag to control, if AILS interpolation coefficients shall be take from L1b(1) or PS2(0)

spare_5

binary bytes	size: 2
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hidden: true

num_samples_apo

binary uint16	size: 2
Number of samples of apodisation vector in spectral domain

num_element_apo

binary uint16	size: 2
Number of elements of apodisation vector in OPD domain

spare_6

binary bytes	size: 10
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hidden: true

thresh_ils

binary double	size: 8
Threshold for spectral grid error on which the ILS is computed unit: "1/cm"

lowest_apo

binary double	size: 8
Lowest value of apodisation vector

thresh_ratio

binary double	size: 8
Threshold of ratio for which inverse squared apodisation function is computed

spare_7

binary bytes	size: 2
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hidden: true

thresh_min_eigen

binary double	size: 8
Threshold defining minimum value of eigenvalue

max_spec_lines

binary uint16	size: 2
Maximum number of spectral lines per microwindow

seq_vmr_ret

ascii array[10]

size: 40

Sequence of processing of VMR retrievals

ascii string size: 4

switch_p_t_retrieval

binary uint16	size: 2
Switch for skipping p,T retrieval

max_hitran_code

binary uint16	size: 2
Maximum HITRAN code to be considered

max_preloop_iter

binary uint16	size: 2
Maximum number of p,T - 1st VMR preloop iterations

spare_8

binary bytes	size: 6
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hidden: true

up_alt_thresh

binary double	size: 8
Upper altitude threshold for use of spectral lines unit: "km"

low_alt_thresh

binary double	size: 8
Lower altitude threshold for use of spectral lines unit: "km"

max_alt_step

binary double	size: 8
Maximum altitude step for hydrostatic equilibrium unit: "km"

switch_ll_cont_def_corr

binary uint16	size: 2
Switch for activation of correction of lowest level for continuum derivatives: 0=deactivate correction; 1=activate correction

ecmwf_ref_alt

binary array[3]

size: 24

Vector containing three reference altitudes to be used for ECMWF based altitude correction

binary double size: 8

unit: "km"

thresh_ecmwf_ref_alt

binary double	size: 8
Threshold to use lowest three altitudes for ECMWF based altitude correction

spare_9

binary bytes	size: 6
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hidden: true