IAS_02_SO2
Variables
The table below lists the variables that are present in the HARP product that results from an ingestion of IAS_02_SO2 data.
field name |
type |
dimensions |
unit |
description |
|---|---|---|---|---|
orbit_index |
int32 |
absolute orbit number |
||
datetime |
double |
{time} |
[s since 2020-01-01] |
on-board time in UTC |
longitude |
double |
{time} |
[degree_east] |
geocentric longitude at sounder pixel centre |
longitude_bounds |
double |
{time, 4} |
[degree_east] |
corner longitudes of the measurement |
latitude |
double |
{time} |
[degree_north] |
geodetic latitude at sounder pixel centre |
latitude_bounds |
double |
{time, 4} |
[degree_north] |
corner latitudes of the measurement |
solar_azimuth_angle |
double |
{time} |
[degree] |
solar azimuth angle at sounder pixel centre |
solar_zenith_angle |
double |
{time} |
[degree] |
solar zenith angle at sounder pixel centre |
sensor_azimuth_angle |
double |
{time} |
[degree] |
measurement azimuth angle at sounder pixel centre |
sensor_zenith_angle |
double |
{time} |
[degree] |
measurement zenith angle at sounder pixel centre |
SO2_column_number_density |
float |
{time} |
[DU] |
SO2 column |
SO2_layer_height |
float |
{time} |
[m] |
retrieved plume altitude |
validity |
int8 |
{time} |
[] |
general retrieval quality flag |
index |
int32 |
{time} |
zero-based index of the sample within the source product |
Ingestion options
The table below lists the available ingestion options for IAS_02_SO2 products.
option name |
legal values |
description |
|---|---|---|
so2_column |
7km, 10km, 13km, 16km, 25km |
whether to ingest the SO2 column consistent with the SO2 layer height (default), the SO2 column from the 7km box profile (so2_column=7km), from the 10km box profile (so2_column=10km), from the 13km box profile (so2_column=13km), from the 16km box profile (so2_column=16km), or from the 25km box profile (so2_column=25km) |
Mapping description
The table below details where and how each variable was retrieved from the input product.
field name |
mapping description |
|
|---|---|---|
orbit_index |
path |
/@orbit_start |
datetime |
path |
/data/geolocation_information/onboard_utc[] |
longitude |
path |
/data/geolocation_information/sounder_pixel_longitude[] |
longitude_bounds |
path |
/data/geolocation_information/sounder_pixel_longitude_bounds[] |
description |
the corner coordinates are rough estimates of the circle areas for the scan elements; the size of a scan element (in a certain direction) is taken to be half the distance, from center to center, from a scan element to its nearest neighboring scan element (within the same 2x2 subgrid inside a Field of Regard (FOR)) |
|
latitude |
path |
/data/geolocation_information/sounder_pixel_latitude[] |
latitude_bounds |
path |
/data/geolocation_information/sounder_pixel_latitude_bounds[] |
description |
the corner coordinates are rough estimates of the circle areas for the scan elements; the size of a scan element (in a certain direction) is taken to be half the distance, from center to center, from a scan element to its nearest neighboring scan element (within the same 2x2 subgrid inside a Field of Regard (FOR)) |
|
solar_azimuth_angle |
path |
/data/geolocation_information/sounder_pixel_sun_azimuth[] |
solar_zenith_angle |
path |
/data/geolocation_information/sounder_pixel_sun_zenith[] |
sensor_azimuth_angle |
path |
/data/geolocation_information/sounder_pixel_azimuth[] |
sensor_zenith_angle |
path |
/data/geolocation_information/sounder_pixel_zenith[] |
SO2_column_number_density |
condition |
so2_column unset |
path |
/data/so2_col[] |
|
condition |
so2_column=7km |
|
path |
/data/so2_col_at_altitudes[0] |
|
condition |
so2_column=10km |
|
path |
/data/so2_col_at_altitudes[1] |
|
condition |
so2_column=13km |
|
path |
/data/so2_col_at_altitudes[2] |
|
condition |
so2_column=16km |
|
path |
/data/so2_col_at_altitudes[3] |
|
condition |
so2_column=25km |
|
path |
/data/so2_col_at_altitudes[4] |
|
SO2_layer_height |
path |
/data/so2_altitude[] |
validity |
path |
/data/so2_qflag[] |
description |
the uint8 data is cast to int8 |
|