SCIAMACHY_L1c
Variables
The table below lists the variables that are present in the HARP product that results from an ingestion of SCIAMACHY_L1c data.
| field name | type | dimensions | unit | description |
|---|---|---|---|---|
| datetime_start | double | {time} | [seconds since 2000-01-01] | start time of the measurement |
| datetime_length | double | {time} | [s] | shortest integration time of all measurements at this time |
| orbit_index | int32 | absolute orbit number | ||
| altitude | double | {time} | [km] | tangent altitude for each measurement |
| latitude | double | {time} | [degree_north] | center latitude for each pixel |
| longitude | double | {time} | [degree_east] | center longitude for each pixel |
| latitude_bounds | double | {time, 4} | [degree_north] | corner latitudes for each nadir pixel |
| longitude_bounds | double | {time, 4} | [degree_east] | corner longitudes for each nadir pixel |
| sensor_altitude | double | {time} | [km] | satellite altitude for each pixel |
| sensor_latitude | double | {time} | [degree_north] | satellite latitude for each pixel |
| sensor_longitude | double | {time} | [degree_east] | satellite longitude for each pixel |
| wavelength_photon_radiance | double | {time, spectral} | [(count/s/cm2/sr/nm)] | wavelength photon radiance of each spectrum measurement |
| wavelength | double | {time, spectral} | [nm] | nominal wavelength assignment for each of the detector pixels |
| integration_time | double | {time, spectral} | [s] | integration time for a readout |
| solar_zenith_angle | double | {time} | [degree] | solar zenith angle for each measurement |
| solar_azimuth_angle | double | {time} | [degree] | solar azimuth angle for each measurement |
| viewing_zenith_angle | double | {time} | [degree] | viewing zenith angle for each measurement |
| viewing_azimuth_angle | double | {time} | [degree] | viewing azimuth angle for each measurement |
| scan_direction_type | int8 | {time} | scan direction for each measurement; enumeration values: forward (0), backward (1), mixed (2) | |
| index | int32 | {time} | zero-based index of the sample within the source product |
Ingestion options
The table below lists the available ingestion options for SCIAMACHY_L1c products.
| option name | legal values | description |
|---|---|---|
| data | nadir, limb, occultation, sun_reference | retrieve the nadir, limb, occultation or sun_reference spectra; by default the nadir spectra are retrieved |
This definition is only applicable when: data=nadir or data=limb or data=occultation
Mapping description
The table below details where and how each variable was retrieved from the input product.
| field name | mapping description | |
|---|---|---|
| datetime_start | path | /states/dsr_time |
| description | the dsr_time is increased by the number of the applicable readout multiplied by the minimum integration time | |
| datetime_length | path | /states[]/clus_config[]/intgr_time |
| orbit_index | path | /mph/abs_orbit |
| altitude | available | optional |
| condition | data=limb | |
| path | /limb[]/geo[]/tan_h[1] | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time | |
| condition | data=occultation | |
| path | /occultation[]/geo[]/tan_h[1] | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time | |
| latitude | condition | data=nadir or data unset |
| path | /nadir[]/geo[]/center_coord/latitude | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state | |
| condition | data=limb | |
| path | /limb[]/geo[]/tang_ground_point[1]/latitude | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state | |
| condition | data=occultation | |
| path | /occultation[]/geo[]/tang_ground_point[1]/latitude | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state | |
| longitude | condition | data=nadir or data unset |
| path | /nadir[]/geo[]/center_coord/longitude | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state | |
| condition | data=limb | |
| path | /limb[]/geo[]/tang_ground_point[1]/longitude | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state | |
| condition | data=occultation | |
| path | /occultation[]/geo[]/tang_ground_point[1]/longitude | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state | |
| latitude_bounds | available | optional |
| path | /nadir[]/geo[]/corner_coord[]/latitude | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state. The corners are rearranged in the following way: 0,2,3,1 | |
| longitude_bounds | available | optional |
| path | /nadir[]/geo[]/corner_coord[]/longitude | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state. The corners are rearranged in the following way: 0,2,3,1 | |
| sensor_altitude | condition | data=nadir or data unset |
| path | /nadir[]/geo[]/sat_h | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state | |
| condition | data=limb | |
| path | /limb[]/geo[]/sat_h | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state | |
| condition | data=occultation | |
| path | /occultation[]/geo[]/sat_h | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state | |
| sensor_latitude | condition | data=nadir or data unset |
| path | /nadir[]/geo[]/sub_sat_point/latitude | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state | |
| condition | data=limb | |
| path | /limb[]/geo[]/sub_sat_point/latitude | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state | |
| condition | data=occultation | |
| path | /occultation[]/geo[]/sub_sat_point/latitude | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state | |
| sensor_longitude | condition | data=nadir or data unset |
| path | /nadir[]/geo[]/sub_sat_point/longitude | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state | |
| condition | data=limb | |
| path | /limb[]/geo[]/sub_sat_point/longitude | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state | |
| condition | data=occultation | |
| path | /occultation[]/geo[]/sub_sat_point/longitude | |
| description | dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state | |
| wavelength_photon_radiance | condition | data=nadir or data unset |
| path | /nadir[]/observations[] | |
| condition | data=limb | |
| path | /limb[]/observations[] | |
| condition | data=occultation | |
| path | /occultation[]/observations[] | |
| wavelength | condition | data=nadir or data unset |
| path | nadir[]/pixel_wavelength[] | |
| condition | data=limb | |
| path | limb[]/pixel_wavelength[] | |
| condition | data=occultation | |
| path | occultation[]/pixel_wavelength[] | |
| integration_time | path | /states[]/clus_config[]/intgr_time |
| solar_zenith_angle | condition | data=nadir or data unset |
| path | /nadir[]/geo[]/sol_zen_ang[1] | |
| condition | data=limb | |
| path | /limb[]/geo[]/sol_zen_ang[1] | |
| condition | data=occultation | |
| path | /occultation[]/geo[]/sol_zen_ang[1] | |
| solar_azimuth_angle | condition | data=nadir or data unset |
| path | /nadir[]/geo[]/sol_azi_ang[1] | |
| condition | data=limb | |
| path | /limb[]/geo[]/sol_azi_ang[1] | |
| condition | data=occultation | |
| path | /occultation[]/geo[]/sol_azi_ang[1] | |
| viewing_zenith_angle | condition | data=nadir or data unset |
| path | /nadir[]/geo[]/los_zen_ang[1] | |
| condition | data=limb | |
| path | /limb[]/geo[]/los_zen_ang[1] | |
| condition | data=occultation | |
| path | /occultation[]/geo[]/los_zen_ang[1] | |
| viewing_azimuth_angle | condition | data=nadir or data unset |
| path | /nadir[]/geo[]/los_azi_ang[1] | |
| condition | data=limb | |
| path | /limb[]/geo[]/los_azi_ang[1] | |
| condition | data=occultation | |
| path | /occultation[]/geo[]/los_azi_ang[1] | |
| scan_direction_type | available | optional |
| path | /nadir[]/geo[]/corner_coord[], /states[]/intg_times[] | |
| description | when the minimum integration time of a state is higher than 1 second we are dealing with a mixed (2) pixelotherwise the scan direction is based on the corner coordinates of the first ground pixel of the measurement. The first geolocation pixel is a backscan (1) pixel if the inproduct of the unit vector of the third corner with the outproduct of the unit vector of the first corner and the unit vector of the second corner is negative (otherwise it is part of a forward (0) scan). | |