BEAT-II Record: SCIAMACHY_L2_RV

Fields

The table below gives an overview of possible fields that can be returned from an ingestion of SCIAMACHY_L2_RV data. The 'default' column indicates whether the specified data item is included in the ingestion by default or not. You can change which data items are ingested by making use of the include and exclude filter options (see below).

field name	type	dimensions	default	description
type	string		included	reference to the type of data in this record
time	double	[main]	included	Measurement time
latitude	double	[main]	included	The center latitude for each nadir pixel
longitude	double	[main]	included	The center longitude for each nadir pixel
corner_latitude	double	[main, 4]	included	The corner latitudes for each nadir pixel
corner_longitude	double	[main, 4]	included	The corner longitudes for each nadir pixel
o3_column	double	[main]	included	Ozone vertical column density
o3_column_unit	string		included	molec/cm^2 or DU
o3_column_error	double	[main]	included	Error on the vertical column density
o3_column_error_unit	string		included	%
integration_time	double	[main]	included	The integration time for a retrieval
scan_direction	string	[main]	included	The scan direction for each measurement: 'forward', 'backward', or 'mixed' (for a measurement that consisted of one or more forward and backward scans)

Ingestion filter options

Ingestion filter options are passed as a ',' or ';' separated string to the ingestion function. Each filter option needs to be formulated as option_name=value[ value value] (some options accept more than one value). For example, if a product has filter options 'altitude_min' and 'time_min' you can provide a filter option string "latitude_min=30,time_min=2003-01-01" to get all measurements at or above 30km and on or after January 1st 2003.

option name	type	description
product_version	integer	If multiple product format versions for this product type exist, you can use this filter option to select from which ones data should be ingested (i.e. you can provide a space-separated list of allowed product format version numbers). The list of available version numbers for this product type can be found in the CODA Product Format Definitions documentation.
include	string	Provide a space-separated list of field names to ingest additional data items (i.e. fields that are not ingested by default). You can use the special case include=* to indicate that you want to ingest all available data items.
exclude	string	Provide a space-separated list of field names that you don't want ingested. Mind that the exclude filter is processed after the include filter.
time_min	time*	Only include elements for which the value is greater than or equal to the provided filter option value
time_max	time*	Only include elements for which the value is less than or equal to the provided filter option value
time	time*	Only include elements that match the list of given filter option values
latitude_min	double	Only include elements for which the value is greater than or equal to the provided filter option value
latitude_max	double	Only include elements for which the value is less than or equal to the provided filter option value
latitude	double	Only include elements that match the list of given filter option values
longitude_min	double	Only include elements for which the value is greater than or equal to the provided filter option value
longitude_max	double	Only include elements for which the value is less than or equal to the provided filter option value
longitude	double	Only include elements that match the list of given filter option values
o3_column_min	double	Only include elements for which the value is greater than or equal to the provided filter option value
o3_column_max	double	Only include elements for which the value is less than or equal to the provided filter option value
o3_column	double	Only include elements that match the list of given filter option values
o3_column_error_min	double	Only include elements for which the value is greater than or equal to the provided filter option value
o3_column_error_max	double	Only include elements for which the value is less than or equal to the provided filter option value
o3_column_error	double	Only include elements that match the list of given filter option values
integration_time_min	double	Only include elements for which the value is greater than or equal to the provided filter option value
integration_time_max	double	Only include elements for which the value is less than or equal to the provided filter option value
integration_time	double	Only include elements that match the list of given filter option values
scan_direction	string	Only include elements that match the list of given filter option values
convert_to_DU	boolean	If enabled, the O3 VCD values will be converted to Dobson Units

^* Time values can be passed as either 'yyyy-mm-dd', 'yyyy-mm-ddThh:mm:ss', 'yyyy-mm-ddThh:mm:ss.uuuuuu' or a floating point value indicating the amount of seconds since 2000-01-01 00:00:00.

Mapping description

Below a description is provided on how each data item in the ingested record was retrieved from the product.

field name	mapping description
time	path	/o3_vertical_column[]/dsr_time
latitude	path	/geolocation[]/coor_grd[]
	description	Latitude part of the calculated average of the four corner coordinates for this measurement
longitude	path	/geolocation[]/coor_grd[]
	description	Longitude part of the calculated average of the four corner coordinates for this measurement
corner_latitude	condition	No co-adding needed
	path	/geolocation[]/cor_coor_nad[]/latitude
	description	The corners are rearranged in the following way: 0,2,3,1
	condition	No co-adding needed and sph.software_version = "SCIA/4.02", "SCIA/5.00", "SCIA/5.01", "SCIA/5.02", "SCIA/5.03", or "SCIA/5.04"
	path	/geolocation[]/cor_coor_nad[]/latitude
	description	First the corners 0 and 1 are swapped and the corners 2 and 3 are swapped. Then the corners are rearranged in the following way: 0,2,3,1
	condition	Co-adding needed and all N geolocations are within a single scan (N is not divisible by 5)
	path	/geolocation[]/cor_coor_nad[]
	description	cor_coor_nad[0] and cor_coor_nad[1] are taken from the first pixel and cor_coor_nad[2] and cor_coor_nad[3] are taken from the N-th pixel. The corners are rearranged in the following way: 0,2,3,1
	condition	Co-adding needed and all N geolocations are within a single scan (N is not divisible by 5) and sph.software_version = "SCIA/4.02", "SCIA/5.00", "SCIA/5.01", "SCIA/5.02", "SCIA/5.03", or "SCIA/5.04"
	path	/geolocation[]/cor_coor_nad[]
	description	cor_coor_nad[0] is taken from cor_coor_nad[1] of the first pixel, cor_coor_nad[1] is taken from cor_coor_nad[3] of the first pixel, cor_coor_nad[2] is taken from cor_coor_nad[3] of the N-th pixel, and cor_coor_nad[3] is taken from cor_coor_nad[2] of the N-th pixel. The corners are rearranged in the following way: 0,2,3,1
	condition	Co-adding needed of both forward and backward scan pixels (N is divisible by 5)
	path	/geolocation[]/cor_coor_nad[]
	description	cor_coor_nad[0] is taken from the first pixel, cor_coor_nad[2] is taken from the fourth pixel, cor_coor_nad[1] is taken from cor_coor_nad[3] of the N-th pixel, and cor_coor_nad[3] is taken from cor_coor_nad[1] from the N-th pixel. The corners are rearranged in the following way: 0,2,3,1
	condition	Co-adding needed of both forward and backward scan pixels (N is divisible by 5) and sph.software_version = "SCIA/4.02", "SCIA/5.00", "SCIA/5.01", "SCIA/5.02", "SCIA/5.03", or "SCIA/5.04"
	path	/geolocation[]/cor_coor_nad[]
	description	cor_coor_nad[0] is taken from cor_coor_nad[1] for the first pixel, cor_coor_nad[2] is taken from cor_coor_nad[3] of the fourth pixel, cor_coor_nad[1] is taken from cor_coor_nad[2] of the N-th pixel, and cor_coor_nad[3] is taken from cor_coor_nad[0] of the N-th pixel. The corners are rearranged in the following way: 0,2,3,1
corner_longitude	condition	No co-adding needed
	path	/geolocation[]/cor_coor_nad[]/longitude
	description	The corners are rearranged in the following way: 0,2,3,1
	condition	No co-adding needed and sph.software_version = "SCIA/4.02", "SCIA/5.00", "SCIA/5.01", "SCIA/5.02", "SCIA/5.03", or "SCIA/5.04"
	path	/geolocation[]/cor_coor_nad[]/longitude
	description	First the corners 0 and 1 are swapped and the corners 2 and 3 are swapped. Then the corners are rearranged in the following way: 0,2,3,1
	condition	Co-adding needed and all N geolocations are within a single scan (N is not divisible by 5)
	path	/geolocation[]/cor_coor_nad[]
	description	cor_coor_nad[0] and cor_coor_nad[1] are taken from the first pixel and cor_coor_nad[2] and cor_coor_nad[3] are taken from the N-th pixel. The corners are rearranged in the following way: 0,2,3,1
	condition	Co-adding needed and all N geolocations are within a single scan (N is not divisible by 5) and sph.software_version = "SCIA/4.02", "SCIA/5.00", "SCIA/5.01", "SCIA/5.02", "SCIA/5.03", or "SCIA/5.04"
	path	/geolocation[]/cor_coor_nad[]
	description	cor_coor_nad[0] is taken from cor_coor_nad[1] of the first pixel, cor_coor_nad[1] is taken from cor_coor_nad[3] of the first pixel, cor_coor_nad[2] is taken from cor_coor_nad[3] of the N-th pixel, and cor_coor_nad[3] is taken from cor_coor_nad[2] of the N-th pixel. The corners are rearranged in the following way: 0,2,3,1
	condition	Co-adding needed of both forward and backward scan pixels (N is divisible by 5)
	path	/geolocation[]/cor_coor_nad[]
	description	cor_coor_nad[0] is taken from the first pixel, cor_coor_nad[2] is taken from the fourth pixel, cor_coor_nad[1] is taken from cor_coor_nad[3] of the N-th pixel, and cor_coor_nad[3] is taken from cor_coor_nad[1] from the N-th pixel. The corners are rearranged in the following way: 0,2,3,1
	condition	Co-adding needed of both forward and backward scan pixels (N is divisible by 5) and sph.software_version = "SCIA/4.02", "SCIA/5.00", "SCIA/5.01", "SCIA/5.02", "SCIA/5.03", or "SCIA/5.04"
	path	/geolocation[]/cor_coor_nad[]
	description	cor_coor_nad[0] is taken from cor_coor_nad[1] for the first pixel, cor_coor_nad[2] is taken from cor_coor_nad[3] of the fourth pixel, cor_coor_nad[1] is taken from cor_coor_nad[2] of the N-th pixel, and cor_coor_nad[3] is taken from cor_coor_nad[0] of the N-th pixel. The corners are rearranged in the following way: 0,2,3,1
o3_column	path	/o3_vertical_column[]/o3_vcd
	condition	convert_to_DU = 1
	path	/o3_vertical_column[]/o3_vcd
	description	converted to Dobson Units by dividing the value by 2.6868E16
o3_column_unit	description	Will be set to "molec/cm^2"
	condition	convert_to_DU = 1
	description	Will be set to "DU"
o3_column_error	path	/o3_vertical_column[]/err_vcd
o3_column_error_unit	description	Will be set to "%"
integration_time	path	/o3_vertical_column[]/integr_time
scan_direction	path	/geolocation[]/corner_coord[], /geolocation[]/dsr_time
	description	When the integration time is higher than 1s we are dealing with a mixed pixel, otherwise the scan direction is based on the corner coordinates of the first ground pixel of the measurement. The first geolocation pixel is a backscan 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 scan)