GOSAT_FTS_L2_CH4_TC
Variables
The table below lists the variables that are present in the HARP product that results from an ingestion of GOSAT_FTS_L2_CH4_TC data.
field name |
type |
dimensions |
unit |
description |
|---|---|---|---|---|
datetime |
double |
{time} |
[seconds since 2000-01-01] |
time of the measurement at end of integration time |
longitude |
double |
{time} |
[degree_east] |
longitude of the measurement |
latitude |
double |
{time} |
[degree_north] |
latitude of the measurement |
longitude_bounds |
double |
{time, 4} |
[degree_east] |
corner longitudes for the geospatial footprint of the measurement |
latitude_bounds |
double |
{time, 4} |
[degree_north] |
corner latitudes for the geospatial footprint of the measurement |
solar_azimuth_angle |
double |
{time} |
[degree] |
solar azimuth angle at the observation point |
solar_zenith_angle |
double |
{time} |
[degree] |
solar zenith angle at the observation point |
sensor_azimuth_angle |
double |
{time} |
[degree] |
sensor azimuth angle at the surface |
sensor_zenith_angle |
double |
{time} |
[degree] |
sensor zenith angle at the observation point |
CH4_column_number_density |
double |
{time} |
[molec/cm^2] |
CH4 column number density |
CH4_column_number_density_uncertainty |
double |
{time} |
[molec/cm^2] |
uncertainty of the CH4 column number density |
index |
int32 |
{time} |
zero-based index of the sample within the source product |
Mapping description
The table below details where and how each variable was retrieved from the input product.
field name |
mapping description |
|
|---|---|---|
datetime |
path |
/scanAttribute/time[] |
longitude |
path |
/Data/geolocation/longitude[] |
latitude |
path |
/Data/geolocation/latitude[] |
longitude_bounds |
path |
/Data/geolocation/footPrintLongitude |
description |
the corners are calculated by defining a bounding box around the circular footprint area |
|
latitude_bounds |
path |
/Data/geolocation/footPrintLatitude |
description |
the corners are calculated by defining a bounding box around the circular footprint area |
|
solar_azimuth_angle |
path |
/Data/geolocation/solarAzimuth[] |
solar_zenith_angle |
path |
/Data/geolocation/solarZenith[] |
sensor_azimuth_angle |
path |
/Data/geolocation/satelliteAzimuth[] |
sensor_zenith_angle |
path |
/Data/geolocation/satelliteZenith[] |
CH4_column_number_density |
path |
/Data/totalColumn/CH4TotalColumn |
CH4_column_number_density_uncertainty |
path |
/Data/totalColumn/CH4TotalColumnSmoothingError, /Data/totalColumn/CH4TotalColumnRetrievalNoise, /Data/totalColumn/CH4TotalColumnInterferenceError, /Data/totalColumn/CH4TotalColumnExternalNoise |
description |
the uncertainty returned is the sum of all four error components |
|