# SCIAMACHY_L1c

## Variables

The table below lists the variables that are present in the HARP product that results from an ingestion of SCIAMACHY_L1c data.

field name

type

dimensions

unit

description

datetime_start

double

{time}

[seconds since 2000-01-01]

start time of the measurement

datetime_length

double

{time}

[s]

shortest integration time of all measurements at this time

orbit_index

int32

absolute orbit number

altitude

double

{time}

[km]

tangent altitude for each measurement

latitude

double

{time}

[degree_north]

center latitude for each pixel

longitude

double

{time}

[degree_east]

center longitude for each pixel

latitude_bounds

double

{time, 4}

[degree_north]

corner latitudes for each nadir pixel

longitude_bounds

double

{time, 4}

[degree_east]

corner longitudes for each nadir pixel

sensor_altitude

double

{time}

[km]

satellite altitude for each pixel

sensor_latitude

double

{time}

[degree_north]

satellite latitude for each pixel

sensor_longitude

double

{time}

[degree_east]

satellite longitude for each pixel

double

{time, spectral}

[(count/s/cm2/sr/nm)]

wavelength photon radiance of each spectrum measurement

wavelength

double

{time, spectral}

[nm]

nominal wavelength assignment for each of the detector pixels

integration_time

double

{time, spectral}

[s]

integration time for a readout

solar_zenith_angle

double

{time}

[degree]

solar zenith angle for each measurement

solar_azimuth_angle

double

{time}

[degree]

solar azimuth angle for each measurement

viewing_zenith_angle

double

{time}

[degree]

viewing zenith angle for each measurement

viewing_azimuth_angle

double

{time}

[degree]

viewing azimuth angle for each measurement

scan_direction_type

int8

{time}

scan direction for each measurement; enumeration values: forward (0), backward (1), mixed (2)

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_L1c products.

option name

legal values

description

data

nadir, limb, occultation, sun_reference

retrieve the nadir, limb, occultation or sun_reference spectra; by default the nadir spectra are retrieved

This definition is only applicable when: data=nadir or data=limb or data=occultation

## Mapping description

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

field name

mapping description

datetime_start

path

/states/dsr_time

description

the dsr_time is increased by the number of the applicable readout multiplied by the minimum integration time

datetime_length

path

/states[]/clus_config[]/intgr_time

orbit_index

path

/mph/abs_orbit

altitude

available

optional

condition

data=limb

path

/limb[]/geo[]/tan_h[1]

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time

condition

data=occultation

path

/occultation[]/geo[]/tan_h[1]

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time

latitude

condition

data=nadir or data unset

path

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state

condition

data=limb

path

/limb[]/geo[]/tang_ground_point[1]/latitude

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state

condition

data=occultation

path

/occultation[]/geo[]/tang_ground_point[1]/latitude

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state

longitude

condition

data=nadir or data unset

path

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state

condition

data=limb

path

/limb[]/geo[]/tang_ground_point[1]/longitude

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state

condition

data=occultation

path

/occultation[]/geo[]/tang_ground_point[1]/longitude

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state

latitude_bounds

available

optional

path

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state. The corners are rearranged in the following way: 0,2,3,1

longitude_bounds

available

optional

path

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state. The corners are rearranged in the following way: 0,2,3,1

sensor_altitude

condition

data=nadir or data unset

path

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state

condition

data=limb

path

/limb[]/geo[]/sat_h

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state

condition

data=occultation

path

/occultation[]/geo[]/sat_h

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state

sensor_latitude

condition

data=nadir or data unset

path

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state

condition

data=limb

path

/limb[]/geo[]/sub_sat_point/latitude

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state

condition

data=occultation

path

/occultation[]/geo[]/sub_sat_point/latitude

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state

sensor_longitude

condition

data=nadir or data unset

path

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state

condition

data=limb

path

/limb[]/geo[]/sub_sat_point/longitude

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state

condition

data=occultation

path

/occultation[]/geo[]/sub_sat_point/longitude

description

dsr is the dsr for the cluster with an integration time equal to the minimal integration time of all ingested clusters for that state

condition

data=nadir or data unset

path

condition

data=limb

path

/limb[]/observations[]

condition

data=occultation

path

/occultation[]/observations[]

wavelength

condition

data=nadir or data unset

path

condition

data=limb

path

limb[]/pixel_wavelength[]

condition

data=occultation

path

occultation[]/pixel_wavelength[]

integration_time

path

/states[]/clus_config[]/intgr_time

solar_zenith_angle

condition

data=nadir or data unset

path

condition

data=limb

path

/limb[]/geo[]/sol_zen_ang[1]

condition

data=occultation

path

/occultation[]/geo[]/sol_zen_ang[1]

solar_azimuth_angle

condition

data=nadir or data unset

path

condition

data=limb

path

/limb[]/geo[]/sol_azi_ang[1]

condition

data=occultation

path

/occultation[]/geo[]/sol_azi_ang[1]

viewing_zenith_angle

condition

data=nadir or data unset

path

condition

data=limb

path

/limb[]/geo[]/los_zen_ang[1]

condition

data=occultation

path

/occultation[]/geo[]/los_zen_ang[1]

viewing_azimuth_angle

condition

data=nadir or data unset

path

condition

data=limb

path

/limb[]/geo[]/los_azi_ang[1]

condition

data=occultation

path

/occultation[]/geo[]/los_azi_ang[1]

scan_direction_type

available

optional

path