SCIAMACHY_L2_LIMB_UV1_NO2
Variables
The table below lists the variables that are present in the HARP product that results from an ingestion of SCIAMACHY_L2_LIMB_UV1_NO2 data.
field name |
type |
dimensions |
unit |
description |
|---|---|---|---|---|
datetime_start |
double |
{time} |
[seconds since 2000-01-01] |
measurement start time for each profile |
datetime_length |
double |
{time} |
[s] |
measurement integration time |
orbit_index |
int32 |
absolute orbit number |
||
altitude_bounds |
double |
{time, vertical, 2} |
[km] |
altitude bounds for each profile point |
pressure_bounds |
double |
{time, vertical, 2} |
[hPa] |
pressure bounds for each profile point |
latitude |
double |
{time} |
[degree_north] |
tangent latitude of the vertically mid profile point |
longitude |
double |
{time} |
[degree_east] |
tangent longitude of the vertically mid profile point |
solar_zenith_angle |
double |
{time} |
[degree] |
solar zenith angle at top of atmosphere for the middle most profile point |
viewing_zenith_angle |
double |
{time} |
[degree] |
line of sight zenith angle at top of atmosphere for the middle most profile point |
relative_azimuth_angle |
double |
{time} |
[degree] |
relative azimuth angle at top of atmosphere for the middle most profile point |
temperature |
double |
{time, vertical} |
[K] |
temperature for each profile point |
NO2_volume_mixing_ratio |
double |
{time, vertical} |
[ppv] |
NO2 volume mixing ratio |
NO2_volume_mixing_ratio_uncertainty |
double |
{time, vertical} |
[ppv] |
error on the NO2 volume mixing ratio |
NO2_volume_mixing_ratio_avk |
double |
{time, vertical, vertical} |
[] |
averaging kernel on the NO2 volume mixing ratio |
NO2_number_density |
double |
{time, vertical} |
[molec/cm^3] |
NO2 number density |
NO2_number_density_uncertainty |
double |
{time, vertical} |
[molec/cm^3] |
error on the NO2 number density |
NO2_number_density_apriori |
double |
{time, vertical} |
[molec/cm^3] |
a priori NO2 number density profile |
NO2_number_density_avk |
double |
{time, vertical, vertical} |
[(molec/cm^3)/(molec/cm^3)] |
averaging kernel on the NO2 number density |
index |
int32 |
{time} |
zero-based index of the sample within the source product |
Ingestion options
The table below lists the available ingestion options for SCIAMACHY_L2 products.
option name |
legal values |
description |
|---|---|---|
dataset |
nad_uv0_o3, nad_uv1_no2, nad_uv3_bro, nad_uv4_h2co, nad_uv5_so2, nad_uv6_oclo, nad_uv7_so2, nad_uv8_h2o, nad_uv9_chocho, nad_ir0_h2o, nad_ir1_ch4, nad_ir2_n2o, nad_ir3_co, nad_ir4_co2, lim_uv0_o3, lim_uv1_no2, lim_uv3_bro, clouds_aerosol |
the dataset of the L2 product to ingest; each dataset is a combination of nadir/limb choice, retrieval window, and main quantity; option values are ‘nad_uv0_o3’ (default), ‘nad_uv1_no2’, ‘nad_uv3_bro’, ‘nad_uv4_h2co’, ‘nad_uv5_so2’, ‘nad_uv6_oclo’, ‘nad_uv7_so2’, ‘nad_uv8_h2o’, ‘nad_uv9_chocho’, ‘nad_ir0_h2o’, ‘nad_ir1_ch4’, ‘nad_ir2_n2o’, ‘nad_ir3_co’, ‘nad_ir4_co2’, ‘lim_uv0_o3’, ‘lim_uv1_no2’, ‘lim_uv3_bro’, ‘clouds_aerosol’ |
This definition is only applicable when: dataset=lim_uv1_no2
Mapping description
The table below details where and how each variable was retrieved from the input product.
field name |
mapping description |
|
|---|---|---|
datetime_start |
path |
/geolocation_limb[]/dsr_time |
description |
records in geolocation_limb do not have a one-to-one mapping with records in the limb/occultation measurement datasets; HARP uses a single measurement time and tangent location per profile which is taken from the middlemost measurement used for the retrieval (i.e. index = (n_meas - 1) / 2); the geolocation record for this measurement is retrieved by matching the measurement time measurement_grid[(n_meas - 1) / 2].dsr_time with the geolocation record time geolocation_limb[]/dsr_time |
|
datetime_length |
path |
/lim_uv1_no2[]/integr_time |
orbit_index |
path |
/mph/abs_orbit |
altitude_bounds |
path |
/lim_uv1_no2[]/tangent_height[] |
description |
the tangent heights are the lower bound altitudes; for the top of the highest layer a TOA value of 100km is used |
|
pressure_bounds |
path |
/lim_uv1_no2[]/tangent_pressure[] |
description |
the tangent pressures are the lower bound pressures; for the top of the highest layer a pressure value of 3.2e-4 hPa is used |
|
latitude |
path |
/geolocation_limb[]/tangent_coord[1]/latitude |
description |
records in geolocation_limb do not have a one-to-one mapping with records in the limb/occultation measurement datasets; HARP uses a single measurement time and tangent location per profile which is taken from the middlemost measurement used for the retrieval (i.e. index = (n_meas - 1) / 2); the geolocation record for this measurement is retrieved by matching the measurement time measurement_grid[(n_meas - 1) / 2].dsr_time with the geolocation record time geolocation_limb[]/dsr_time |
|
longitude |
path |
/geolocation_limb[]/tangent_coord[1]/longitude |
description |
records in geolocation_limb do not have a one-to-one mapping with records in the limb/occultation measurement datasets; HARP uses a single measurement time and tangent location per profile which is taken from the middlemost measurement used for the retrieval (i.e. index = (n_meas - 1) / 2); the geolocation record for this measurement is retrieved by matching the measurement time measurement_grid[(n_meas - 1) / 2].dsr_time with the geolocation record time geolocation_limb[]/dsr_time |
|
solar_zenith_angle |
path |
/geolocation_limb[]/sol_zen_angle_toa[1] |
description |
records in geolocation_limb do not have a one-to-one mapping with records in the limb/occultation measurement datasets; HARP uses a single measurement time and tangent location per profile which is taken from the middlemost measurement used for the retrieval (i.e. index = (n_meas - 1) / 2); the geolocation record for this measurement is retrieved by matching the measurement time measurement_grid[(n_meas - 1) / 2].dsr_time with the geolocation record time geolocation_limb[]/dsr_time |
|
viewing_zenith_angle |
path |
/geolocation_limb[]/los_zen_angle_toa[1] |
description |
records in geolocation_limb do not have a one-to-one mapping with records in the limb/occultation measurement datasets; HARP uses a single measurement time and tangent location per profile which is taken from the middlemost measurement used for the retrieval (i.e. index = (n_meas - 1) / 2); the geolocation record for this measurement is retrieved by matching the measurement time measurement_grid[(n_meas - 1) / 2].dsr_time with the geolocation record time geolocation_limb[]/dsr_time |
|
relative_azimuth_angle |
path |
/geolocation_limb[]/rel_azi_angle_toa[1] |
description |
records in geolocation_limb do not have a one-to-one mapping with records in the limb/occultation measurement datasets; HARP uses a single measurement time and tangent location per profile which is taken from the middlemost measurement used for the retrieval (i.e. index = (n_meas - 1) / 2); the geolocation record for this measurement is retrieved by matching the measurement time measurement_grid[(n_meas - 1) / 2].dsr_time with the geolocation record time geolocation_limb[]/dsr_time |
|
temperature |
path |
/lim_uv1_no2[]/tangent_temp[] |
NO2_volume_mixing_ratio |
path |
/lim_uv1_no2[]/main_species[,0]/tang_vmr |
NO2_volume_mixing_ratio_uncertainty |
path |
/lim_uv1_no2[]/main_species[,0]/err_tang_vmr, /lim_uv1_no2[]/main_species[,0]/tang_vmr |
description |
relative error is converted to absolute error by multiplying with measured value |
|
NO2_volume_mixing_ratio_avk |
available |
optional |
condition |
additional diagnostics vector in limb DSR is long enough to contain number density and AKM information |
|
path |
/lim_uv1_no2[]/main_species[,0]/add_diag[0..n] |
|
description |
the AVK for partial columns as given in the add_diag vector at position 2+stvec+2*n1*num_altitudes+2*num_altitudes is converted to volume mixing ratio units by multiplying each element with conv_mix_i/conv_mix_j, where conv_mix is found in add_diag at position 2+stvec+2*n1*num_altitudes; the vertical axis of the AVK are reversed |
|
NO2_number_density |
available |
optional |
condition |
additional diagnostics vector in limb DSR is long enough to contain number density and AKM information |
|
path |
/lim_uv1_no2[]/main_species[,0]/add_diag[0..n] |
|
NO2_number_density_uncertainty |
available |
optional |
condition |
additional diagnostics vector in limb DSR is long enough to contain number density and AKM information |
|
path |
/lim_uv1_no2[]/main_species[,0]/err_tang_vmr, /lim_uv1_no2[]/main_species[,0]/add_diag[0..n] |
|
description |
relative error is converted to absolute error by multiplying with measured value |
|
NO2_number_density_apriori |
available |
optional |
condition |
additional diagnostics vector in limb DSR is long enough to contain number density and AKM information |
|
path |
/lim_uv1_no2[]/main_species[,0]/add_diag[0..n] |
|
NO2_number_density_avk |
available |
optional |
condition |
additional diagnostics vector in limb DSR is long enough to contain number density and AKM information |
|
path |
/lim_uv1_no2[]/main_species[,0]/add_diag[0..n] |
|
description |
the AVK for partial columns as given in the add_diag vector at position 2+stvec+2*n1*num_altitudes+2*num_altitudes is converted to number density units by multiplying each element with conv_nd_i/conv_nd_j, where conv_nd is found in add_diag at position 2+stvec+2*n1*num_altitudes+num_altitudes; the vertical axis of the AVK are reversed |
|