# OCO_OCO2_LtSIF

## Variables

The table below lists the variables that are present in the HARP product that results from an ingestion of `OCO_OCO2_LtSIF` data.

field name | type | dimensions | unit | description
--- | --- | --- | --- | ---
datetime | double | {time} | [seconds since 1990-01-01] | time
latitude | double | {time} | [degree_north] | center latitude
longitude | double | {time} | [degree_east] | center longitude
latitude_bounds | double | {time, 4} | [degree_north] | corner latitude
longitude_bounds | double | {time, 4} | [degree_east] | corner longitude
solar_azimuth_angle | double | {time} | [degree] | solar azimuth angle
solar_zenith_angle | double | {time} | [degree] | solar zenith angle
viewing_azimuth_angle | double | {time} | [degree] | viewing azimuth angle
viewing_zenith_angle | double | {time} | [degree] | viewing zenith angle
solar_induced_fluorescence | double | {time} | [] | Solar Induced Fluorescence
solar_induced_fluorescence_uncertainty | double | {time} | [] | Estimated 1-Sigma Uncertainty of Solar Induced Fluorescence
wavelength | double |  | [nm] | SIF wavelength
validity | int16 | {time} |  | quality flag
index | int32 | {time} |  | zero-based index of the sample within the source product

## Ingestion options

The table below lists the available ingestion options for `OCO_OCO2_LtSIF` products.

option name | legal values | description
--- | --- | ---
sif_wavelength | 757, 771 | whether to ingest SIF at 740nm (default) or the one at 757nm (sif_wavelength=757) or the one at 771nm (sif_wavelength=771)
daily_correction | applied | whether to ingest the instantaneous SIF (default) or the daily averaged SIF based on geometric correction (daily_correction=applied)

## Mapping description

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

field name | mapping description
--- | ---
datetime | path | /Delta_Time[]
latitude | path | /Latitude[]
longitude | path | /Longitude[]
latitude_bounds | path | /Latitude_Corners[]
longitude_bounds | path | /Longitude_Corners[]
solar_azimuth_angle | path | /SZa[]
solar_zenith_angle | path | /SZA[]
viewing_azimuth_angle | path | /VAz[]
viewing_zenith_angle | path | /VZA[]
solar_induced_fluorescence | condition | sif_wavelength unset, daily_correction unset
path | /SIF_740nm[]
condition | sif_wavelength=757, daily_correction unset
path | /Science/SIF_757nm[]
condition | sif_wavelength=771, daily_correction unset
path | /Science/SIF_771nm[]
condition | sif_wavelength unset, daily_correction=applied
path | /Daily_SIF_740nm[]
condition | sif_wavelength=757, daily_correction=applied
path | /Daily_SIF_757nm[]
condition | sif_wavelength=771, daily_correction=applied
path | /Daily_SIF_771nm[]
solar_induced_fluorescence_uncertainty | available | optional
condition | sif_wavelength unset, daily_correction unset
path | /SIF_Uncertainty_740nm[]
condition | sif_wavelength=757, daily_correction unset
path | /Science/SIF_Uncertainty_757nm[]
condition | sif_wavelength=771, daily_correction unset
path | /Science/SIF_Uncertainty_771nm[]
wavelength | condition | sif_wavelength unset
description | 741
condition | sif_wavelength=757
description | 757
condition | sif_wavelength=771
description | 771
validity | path | /Quality_Flag[]