ESACCI_OZONE_L2_NP

Variables

The table below lists the variables that are present in the HARP product that results from an ingestion of ESACCI_OZONE_L2_NP data.

field name	type	dimensions	unit	description
index	int32	{time}		zero-based index of the sample within the source product
scanline_pixel_index	int16	{time}		zero-based index of the instantaneous field of view within the swath
datetime	double	{time}	hours since 2000-01-01	time of the measurement
longitude	float	{time}	degree_east	longitude of the ground pixel center
latitude	float	{time}	degree_north	latitude of the ground pixel center
longitude_bounds	float	{time, 4}	degree_east	longitudes of the ground pixel corners
latitude_bounds	float	{time, 4}	degree_north	latitudes of the ground pixel corners
solar_zenith_angle	float	{time}	degree	zenith angle of the Sun at the ground pixel center
viewing_zenith_angle	float	{time}	degree	zenith angle of the instrument at the ground pixel center
pressure	float	{vertical}	hPa	pressure
O3_number_density	float	{time, vertical}	cm^-3	O3 number density
O3_number_density_stdev	float	{time, vertical}	cm^-3	uncertainty of the O3 number density
O3_number_density_cov	float	{time, vertical, vertical}	cm^-6	O3 number density solution covariance matrix
O3_number_density_cov_random	float	{time, vertical, vertical}	cm^-6	O3 number density measurement noise covariance matrix
O3_number_density_avk	float	{time, vertical, vertical}	1	O3 number density averaging kernel
O3_volume_mixing_ratio	float	{time, vertical}	ppv	O3 volume mixing ratio
O3_volume_mixing_ratio_stdev	float	{time, vertical}	ppv	uncertainty of the O3 volume mixing ratio
O3_volume_mixing_ratio_apriori	float	{time, vertical}	ppv	O3 volume mixing ratio apriori
O3_volume_mixing_ratio_apriori_stdev	float	{time, vertical}	ppv	uncertainty of the O3 volume mixing ratio apriori
cloud_fraction	double	{time}	1	effective cloud fraction
cloud_top_pressure	double	{time}	hPa	cloud top pressure
cloud_top_albedo	double	{time}	1	cloud top albedo
surface_albedo	float	{time}	1	surface albedo
surface_pressure	float	{time}	hPa	surface pressure

Mapping description

The table below details where and how each variable was retrieved from the input product.

field name	mapping description
scanline_pixel_index	path	/scp[]
datetime	path	/@Data_date, /time[]
	description	datetime converted from the UTC epoch of the product and an offset in hours to hours since 2000-01-01
longitude	path	/lon[]
latitude	path	/lat[]
longitude_bounds	path	/ll[]
	description	longitudes and latitudes of the ground pixel corners are stored interleaved; longitudes are ingested as [ll[,1], ll[,3], ll[,7], ll[,5]]; note the reordering of the last two values to ensure a simple polygon
latitude_bounds	path	/ll[]
	description	longitudes and latitudes of the ground pixel corners are stored interleaved; latitudes are ingested as [ll[,0], ll[,2], ll[,6], ll[,4]]; note the reordering of the last two values to ensure a simple polygon
solar_zenith_angle	path	/sza[]
viewing_zenith_angle	path	/lza[]
pressure	path	/levs[]
O3_number_density	path	/o3_nd[]
O3_number_density_stdev	path	/o3_nd[], /o3_error[]
	description	derived from the relative error in percent as: o3_error[] * 0.01 * o3_nd[]
O3_number_density_cov	path	/sx[]
O3_number_density_cov_random	path	/sn[]
O3_number_density_avk	path	/ak[]
O3_volume_mixing_ratio	path	/o3_vmr[]
O3_volume_mixing_ratio_stdev	path	/o3_vmr[], /o3_error[]
	description	derived from the relative error in percent as: o3_error[] * 0.01 * o3_vmr[]
O3_volume_mixing_ratio_apriori	path	/o3_ap[]
O3_volume_mixing_ratio_apriori_stdev	path	/o3_ap[], /o3_ap_error[]
	description	derived from the relative error in percent as: o3_ap_error[] * 0.01 * o3_ap[]
cloud_fraction	path	/cloudf[]
cloud_top_pressure	path	/cloudp[]
cloud_top_albedo	path	/clouda[]
surface_albedo	path	/salb[]
surface_pressure	path	/spres[]