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).