GOME_L2
Variables
The table below lists the variables that are present in the HARP product that results from an ingestion of GOME_L2 data.
field name |
type |
dimensions |
unit |
description |
|---|---|---|---|---|
datetime_stop |
double |
{time} |
[seconds since 2000-01-01] |
time of the measurement at end of integration time |
datetime_length |
double |
{time} |
[s] |
measurement integration time |
orbit_index |
int32 |
absolute orbit number |
||
latitude |
double |
{time} |
[degree_north] |
tangent latitude of the measurement |
longitude |
double |
{time} |
[degree_east] |
tangent longitude of the measurement |
latitude_bounds |
double |
{time, 4} |
[degree_north] |
corner latitudes for the ground pixel of the measurement |
longitude_bounds |
double |
{time, 4} |
[degree_east] |
corner longitudes for the ground pixel of the measurement |
O3_column_number_density |
double |
{time} |
[molec/cm^2] |
ozone total column |
O3_column_number_density_uncertainty |
double |
{time} |
[molec/cm^2] |
error on the ozone total column |
NO2_column_number_density |
double |
{time} |
[molec/cm^2] |
NO2 total column |
NO2_column_number_density_uncertainty |
double |
{time} |
[molec/cm^2] |
error on the NO2 total column |
cloud_fraction |
double |
{time} |
[] |
cloud fraction |
cloud_fraction_uncertainty |
double |
{time} |
[] |
cloud fraction error |
cloud_top_height |
double |
{time} |
[km] |
cloud top height |
cloud_top_height_uncertainty |
double |
{time} |
[km] |
cloud top height uncertainty |
cloud_top_pressure |
double |
{time} |
[hPa] |
cloud top pressure |
cloud_top_pressure_uncertainty |
double |
{time} |
[hPa] |
cloud top pressure uncertainty |
cloud_top_albedo |
double |
{time} |
[] |
cloud top albedo |
cloud_top_albedo_uncertainty |
double |
{time} |
[] |
cloud top albedo uncertainty |
surface_pressure |
double |
{time} |
[hPa] |
surface pressure |
surface_height |
double |
{time} |
[km] |
surface height |
surface_albedo |
double |
{time} |
[] |
surface albedo |
solar_zenith_angle |
double |
{time} |
[degree] |
solar zenith angle at top of atmosphere |
viewing_zenith_angle |
double |
{time} |
[degree] |
line of sight zenith angle at top of atmosphere |
relative_azimuth_angle |
double |
{time} |
[degree] |
relative azimuth angle at top of atmosphere |
scan_subindex |
int8 |
{time} |
relative index (0-3) of this measurement within a scan (forward + backward) |
|
scan_direction_type |
int8 |
{time} |
scan direction for each measurement; enumeration values: forward (0), backward (1) |
|
index |
int32 |
{time} |
zero-based index of the sample within the source product |
Ingestion options
The table below lists the available ingestion options for GOME_L2 products.
option name |
legal values |
description |
|---|---|---|
ozone |
vcd1 |
the fitting window choice for ozone to ingest; either window 0 (default) or window 1 (ozone=vcd1) |
Mapping description
The table below details where and how each variable was retrieved from the input product.
field name |
mapping description |
|
|---|---|---|
datetime_stop |
path |
/ddr[]/glr/datetime |
datetime_length |
description |
set to a fixed value of 1.5s for all pixels |
orbit_index |
path |
/pir/start_orbit |
latitude |
path |
/ddr[]/glr/corners[4]/lat |
longitude |
path |
/ddr[]/glr/corners[4]/lon |
description |
each longitude will be transformed from a value in the range 0 - 360 to a value in the range -180 - 180 |
|
latitude_bounds |
path |
/ddr[]/glr/corners[0:3]/lat |
description |
the corners are rearranged in the following way: 1,3,2,0 |
|
longitude_bounds |
path |
/ddr[]/glr/corners[0:3]/lon |
description |
the corners are rearranged in the following way: 1,3,2,0 |
|
O3_column_number_density |
condition |
ozone unset |
path |
/ddr[]/irr/vcd[0]/total |
|
condition |
ozone=vcd1 |
|
path |
/ddr[]/irr/vcd[1]/total |
|
O3_column_number_density_uncertainty |
condition |
ozone unset |
path |
/ddr[]/irr/vcd[0]/total, /ddr[]/irr/vcd[0]/error |
|
description |
relative error is converted to absolute error by multiplying with measured value |
|
condition |
ozone=vcd1 |
|
path |
/ddr[]/irr/vcd[1]/total, /ddr[]/irr/vcd[1]/error |
|
description |
relative error is converted to absolute error by multiplying with measured value |
|
NO2_column_number_density |
path |
/ddr[]/irr/vcd[2]/total |
NO2_column_number_density_uncertainty |
path |
/ddr[]/irr/vcd[2]/total, /ddr[]/irr/vcd[2]/error |
description |
relative error is converted to absolute error by multiplying with measured value |
|
cloud_fraction |
condition |
version=1 |
path |
/ddr[]/irr/icfa/frac |
|
condition |
version>1 |
|
path |
/ddr[]/irr/ocra/cloud_frac |
|
cloud_fraction_uncertainty |
condition |
version=1 |
path |
/ddr[]/irr/icfa/frac, /ddr[]/irr/icfa/err_frac |
|
description |
relative error is converted to absolute error by multiplying with measured value |
|
condition |
version>1 |
|
path |
/ddr[]/irr/ocra/cloud_frac, /ddr[]/irr/ocra/cloud_frac_error |
|
description |
relative error is converted to absolute error by multiplying with measured value |
|
cloud_top_height |
available |
optional |
condition |
version>1 |
|
path |
/ddr[]/irr/rocinn/height |
|
cloud_top_height_uncertainty |
available |
optional |
condition |
version>1 |
|
path |
/ddr[]/irr/rocinn/height, /ddr[]/irr/rocinn/height_error |
|
description |
relative error is converted to absolute error by multiplying with measured value |
|
cloud_top_pressure |
condition |
version=1 |
path |
/ddr[]/irr/icfa/press |
|
condition |
version>1 |
|
path |
/ddr[]/irr/rocinn/pressure |
|
cloud_top_pressure_uncertainty |
condition |
version=1 |
path |
/ddr[]/irr/icfa/press, /ddr[]/irr/icfa/err_press |
|
description |
relative error is converted to absolute error by multiplying with measured value |
|
condition |
version>1 |
|
path |
/ddr[]/irr/rocinn/pressure, /ddr[]/irr/rocinn/pressure_error |
|
description |
relative error is converted to absolute error by multiplying with measured value |
|
cloud_top_albedo |
available |
optional |
condition |
version>1 |
|
path |
/ddr[]/irr/rocinn/albedo |
|
cloud_top_albedo_uncertainty |
available |
optional |
condition |
version>1 |
|
path |
/ddr[]/irr/rocinn/albedo, /ddr[]/irr/rocinn/albedo_error |
|
description |
relative error is converted to absolute error by multiplying with measured value |
|
surface_pressure |
condition |
version=1 |
path |
/ddr[]/irr/icfa/surf_press |
|
condition |
version>1 |
|
path |
/ddr[]/irr/surface_pressure |
|
surface_height |
available |
optional |
condition |
version>1 |
|
path |
/ddr[]/irr/surface_height |
|
surface_albedo |
available |
optional |
condition |
version>1 |
|
path |
/ddr[]/irr/surface_albedo |
|
solar_zenith_angle |
path |
/ddr[]/glr/sza_toa[1] |
viewing_zenith_angle |
path |
/ddr[]/glr/line_sight_toa[1] |
relative_azimuth_angle |
path |
/ddr[]/glr/rel_azi_toa[1] |
scan_subindex |
path |
/ddr[]/glr/subset_counter |
description |
relative index (0-3) of this measurement within a scan (forward + backward) |
|
scan_direction_type |
path |
/ddr[]/glr/subset_counter |
description |
the scan direction is based on the subset_counter of the measurement; 0-2: forward (0), 3: backward (1) |
|