# OSIRIS_L2_O3_MART

## Variables

The table below lists the variables that are present in the HARP product that results from an ingestion of OSIRIS_L2_O3_MART data.

field name

type

dimensions

unit

description

datetime

double

{time}

[seconds since 2000-01-01]

time of the measurement

latitude

double

{time}

[degree_north]

center latitude for a profile

longitude

double

{time}

[degree_east]

center longitude for a profile

altitude

double

{time, vertical}

[km]

altitude in km for each profile element

o3_vmr

double

{time, vertical}

[ppmv]

volume mixing ratio of O3

o3_vmr_error

double

{time, vertical}

[ppmv]

precision of the volume mixing ratio of O3

o3

double

{time, vertical}

[molec/cm3]

O3 number density

solar_zenith_angle

double

{time}

[degree]

solar zenith angle at the tangent point of the measurement; 0 is sun overhead, 90 is sun on the horizon

solar_azimuth_angle

double

{time}

[degree]

solar azimuth angle at the tangent point of the measurement; 0 is due North, 90 is due East, 180 is South and 270 is West

index

int32

{time}

zero-based index of the sample within the source product

## Mapping description

OSIRIS Level 2 products only contain a single profile; all measured profile points will be provided in reverse order (from low altitude to high altitude) in the profile

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

field name

mapping description

datetime

path

/HDFEOS/SWATHS/OSIRIS_Odin_O3MART/Geolocation_Fields/Time[]

description

time converted from TAI93 to seconds since 2000-01-01

latitude

path

/HDFEOS/SWATHS/OSIRIS_Odin_O3MART/Geolocation_Fields/Latitude[]

longitude

path

/HDFEOS/SWATHS/OSIRIS_Odin_O3MART/Geolocation_Fields/Longitude[]

altitude

path

/HDFEOS/SWATHS/OSIRIS_Odin_O3MART/Geolocation_Fields/Altitude[]

description

altitude information will be duplicated for each profile

o3_vmr

path

/HDFEOS/SWATHS/OSIRIS_Odin_O3MART/Data_Fields/O3[]

description

ppmv

o3_vmr_error

path

/HDFEOS/SWATHS/OSIRIS_Odin_O3MART/Data_Fields/O3Precision[]

description

ppmv

o3

path

/HDFEOS/SWATHS/OSIRIS_Odin_O3MART/Data_Fields/O3NumberDensity[]

solar_zenith_angle

path

/HDFEOS/SWATHS/OSIRIS_Odin_O3MART/Geolocation_Fields/SolarZenithAngle[]

solar_azimuth_angle

path

/HDFEOS/SWATHS/OSIRIS_Odin_O3MART/Geolocation_Fields/SolarAzimuthAngle[]