# ECA_MSI_NOM_1B

## Variables

The table below lists the variables that are present in the HARP product that results from an ingestion of `ECA_MSI_NOM_1B` data.

field name | type | dimensions | unit | description
--- | --- | --- | --- | ---
datetime | double | {time} | [seconds since 2000-01-01] | UTC time
latitude | double | {time} | [degree_north] | Geodetic latitude
longitude | double | {time} | [degree_east] | Geodetic longitude
orbit_index | int32 |  |  | absolute orbit number
solar_azimuth_angle | double | {time} | [degree] | solar azimuth angle
solar_elevation_angle | double | {time} | [degree] | solar elevation angle
sensor_azimuth_angle | double | {time} | [degree] | sensor azimuth angle
sensor_elevation_angle | double | {time} | [degree] | sensor elevation angle
wavelength_radiance | double | {time} | [W/m2/sr/um] | radiance
wavelength_irradiance | double | {time} | [W/m2/um] | solar spectral irradiance
brightness_temperature | double | {time} | [K] | brightness temperature
validity | int8 | {time} |  | pixel quality status
index | int32 | {time} |  | zero-based index of the sample within the source product

## Ingestion options

The table below lists the available ingestion options for `ECA_MSI_NOM_1B` products.

option name | legal values | description
--- | --- | ---
band | VNIR, SWIR1, SWIR2, TIR1, TIR2, TIR3 | band: VIS (default), VNIR (band=VNIR), SWIR1 (band=SWIR1), SWIR2 (band=SWIR2), TIR1 (band=TIR1), TIR2 (band=TIR2), TIR3 (band=TIR3)

## Mapping description

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

field name | mapping description
--- | ---
datetime | path | /ScienceData/time
description | time is replicated in the across track dimension
latitude | path | /ScienceData/latitude
longitude | path | /ScienceData/longitude
orbit_index | path | /HeaderData/VariableProductHeader/MainProductHeader/orbitNumber
solar_azimuth_angle | path | /ScienceData/solar_azimuth_angle[<band>,*,*]
description | <band> is 0 (VIS), 1 (VNIR), 2 (SWIR1), 3 (SWIR2), 4 (TIR1), 5 (TIR2), or 6 (TIR3)
solar_elevation_angle | path | /ScienceData/solar_elevation_angle[<band>,*,*]
description | <band> is 0 (VIS), 1 (VNIR), 2 (SWIR1), 3 (SWIR2), 4 (TIR1), 5 (TIR2), or 6 (TIR3)
sensor_azimuth_angle | path | /ScienceData/sensor_azimuth_angle[<band>,*,*]
description | <band> is 0 (VIS), 1 (VNIR), 2 (SWIR1), 3 (SWIR2), 4 (TIR1), 5 (TIR2), or 6 (TIR3)
sensor_elevation_angle | path | /ScienceData/sensor_elevation_angle[<band>,*,*]
description | <band> is 0 (VIS), 1 (VNIR), 2 (SWIR1), 3 (SWIR2), 4 (TIR1), 5 (TIR2), or 6 (TIR3)
wavelength_radiance | available | optional
condition | band=VIS, band=VNIR, band=SWIR1, band=SWIR2
path | /ScienceData/pixel_values[<band>,*,*]
description | <band> is 0 (VIS), 1 (VNIR), 2 (SWIR1), or 3 (SWIR2)
wavelength_irradiance | available | optional
condition | band=VIS, band=VNIR, band=SWIR1, band=SWIR2
path | /ScienceData/solar_spectral_irradiance[<band>,*]
description | <band> is 0 (VIS), 1 (VNIR), 2 (SWIR1), or 3 (SWIR2); data is replicated for all scanlines
brightness_temperature | available | optional
condition | band=TIR1, band=TIR2, band=TIR3
path | /ScienceData/pixel_values[<band>,*,*]
description | <band> is 4 (TIR1), 5 (TIR2), or 6 (TIR3)
validity | path | /ScienceData/pixel_quality_status[<band>,*,*]