# ECA_CPR_NOM_1B

## Variables

The table below lists the variables that are present in the HARP product that results from an ingestion of `ECA_CPR_NOM_1B` data.

field name | type | dimensions | unit | description
--- | --- | --- | --- | ---
datetime | double | {time} | [seconds since 2000-01-01] | UTC time
latitude | double | {time} | [degree_north] | latitude
longitude | double | {time} | [degree_east] | longitude
altitude | double | {time, vertical} | [m] | altitude
solar_azimuth_angle | double | {time} | [degree] | solar azimuth angle
solar_elevation_angle | double | {time} | [degree] | solar elevation angle
surface_altitude | double | {time} | [m] | solar elevation
orbit_index | int32 |  |  | absolute orbit number
doppler_velocity | double | {time, vertical} | [m/s] | doppler velocity
radar_reflectivity_factor | double | {time, vertical} | [mm6/m3] | radar reflectivity factor
index | int32 | {time} |  | zero-based index of the sample within the source product

## Mapping description

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

field name | mapping description
--- | ---
datetime | path | /ScienceData/Geo/profileTime
latitude | path | /ScienceData/Geo/latitude
longitude | path | /ScienceData/Geo/longitude
altitude | path | /ScienceData/Geo/binHeight
description | the vertical grid is inverted to make it ascending
solar_azimuth_angle | path | /ScienceData/Geo/solarAzimuthAngle
solar_elevation_angle | path | /ScienceData/Geo/solarElevationAngle
surface_altitude | path | /ScienceData/Geo/surfaceElevation
orbit_index | path | /HeaderData/VariableProductHeader/MainProductHeader/orbitNumber
doppler_velocity | path | /ScienceData/Data/dopplerVelocity
description | the vertical grid is inverted to make it ascending
radar_reflectivity_factor | path | /ScienceData/Data/radarReflectivityFactor
description | the vertical grid is inverted to make it ascending