GOMOS_L1_LIMB
Variables
The table below lists the variables that are present in the HARP product that results from an ingestion of GOMOS_L1_LIMB data.
| field name | type | dimensions | unit | description |
|---|---|---|---|---|
| datetime_start | double | {time} | [seconds since 2000-01-01] | start time of the measurement |
| datetime_length | double | [s] | integration time for a readout | |
| orbit_index | int32 | absolute orbit number | ||
| latitude | double | {time} | [degree_north] | latitude of the apparent tangent point |
| longitude | double | {time} | [degree_east] | longitude of the apparent tangent point |
| altitude | double | {time} | [m] | altitude of the apparent tangent point |
| wavelength_photon_radiance | double | {time, spectral} | [count/s/cm2/nm/sr] | background spectral photon radiance of each spectrum measurement |
| wavelength_photon_radiance_uncertainty | double | {time, spectral} | [count/s/cm2/nm/sr] | error in the background spectral photon radiance of each spectrum measurement |
| wavelength | double | {spectral} | [nm] | nominal wavelength assignment for each of the detector pixels |
| sensor_latitude | double | {time} | [degree_north] | latitude of the satellite |
| sensor_longitude | double | {time} | [degree_east] | longitude of the satellite |
| sensor_altitude | double | {time} | [m] | altitude of satellite |
| scene_type | int8 | illumination condition for each profile; enumeration values: dark (0), bright (1), twilight (2), straylight (3), twilight_straylight (4) | ||
| index | int32 | {time} | zero-based index of the sample within the source product |
Ingestion options
The table below lists the available ingestion options for GOMOS_L1_LIMB products.
| option name | legal values | description |
|---|---|---|
| spectra | upper, lower | retrieve the upper or lower background spectra; by default the upper spectra are retrieved |
| corrected | true, false | retrieve the corrected or uncorrected background spectra; by default the corrected spectra are retrieved |
Mapping description
GOMOS Level 1 products only contain a single profile; all measured profile points will be provided in order from high altitude to low altitude in the profile
The table below details where and how each variable was retrieved from the input product.
| field name | mapping description | |
|---|---|---|
| datetime_start | path | /lim_mds/dsr_time |
| datetime_length | path | /sph/samp_duration |
| orbit_index | path | /mph/abs_orbit |
| latitude | path | /lim_ads/tangent_lat[] |
| longitude | path | /lim_ads/tangent_long[] |
| altitude | path | /lim_ads/tangent_alt[] |
| wavelength_photon_radiance | condition | spectra=upper and corrected=false |
| path | /lim_mds[]/up_low_back_no_corr[0,] | |
| condition | spectra=lower and corrected=false | |
| path | /lim_mds[]/up_low_back_no_corr[1,] | |
| condition | spectra=upper and corrected=true | |
| path | /lim_mds[]/up_low_back_corr[0,] | |
| condition | spectra=lower and corrected=true | |
| path | /lim_mds[]/up_low_back_corr[1,] | |
| wavelength_photon_radiance_uncertainty | condition | spectra=upper |
| path | /lim_mds[]/err_up_low_back_corr[0,] | |
| condition | spectra=lower | |
| path | /lim_mds[]/err_up_low_back_corr[1,] | |
| wavelength | path | /lim_nom_wav_assignment[]/nom_wl[] |
| description | Will be set to nm | |
| sensor_latitude | path | /lim_ads/lat[] |
| sensor_longitude | path | /lim_ads/longit[] |
| sensor_altitude | path | /lim_ads/alt[] |
| scene_type | condition | CODA product version 0 |
| path | /lim_summary_quality[0]/limb_flag | |
| condition | CODA product version 1 and higher | |
| path | /lim_summary_quality[0]/obs_illum_cond | |