ASDC | PREFIRE_SAT2_1A-RAD

PREFIRE Level 1A

Entry Title: PREFIRE Level 1A Calibrated Spectral Radiance from PREFIRE Satellite 2

Entry ID: PREFIRE_SAT2_1A-RAD_R00

Radiation Budget

Description

PREFIRE (Polar Radiant Energy in the Far InfraRed Experiment) Level 1A Calibrated Spectral Radiance from PREFIRE Satellite 2 (PREFIRE_SAT2_1A-RAD) contains calibrated radiance data retrieved from data collected by the PREFIRE Thermal Infrared Spectrometer (TIRS-PREFIRE) aboard PREFIRE-SAT2. Dual CubeSats each carry a TIRS-PREFIRE, a push broom spectrometer with 63 channels measuring mid- and far-infrared (FIR) radiation from approximately 5 to 53 µm. Most polar emissions are in the FIR but have not been measured on a large scale. PREFIRE aims to fill knowledge gaps in the global energy budget by more accurately characterizing polar emissions. This information will then be assimilated into global circulation and other models to predict future conditions more accurately.

Digital number counts from the PREFIRE_SAT2_0-PAYLOAD-TLM collection are converted to radiance and calibrated using an internal blackbody target and space-look data.

The PREFIRE_SAT2_1A-RAD data are used as input for PREFIRE_SAT2_1B-RAD, which is geolocated radiance. Given that it is not geolocated, PREFIRE_SAT2_1A-RAD is not useful for direct scientific study.

Science data retrieval started on June 29, 2024, and is ongoing. Geographic coverage is global, with the greatest concentration of data in the polar regions. This data has a temporal resolution of 0.707 seconds and is available in NetCDF-4.

Calibrated radiance data for the sister instrument aboard PREFIRE-SAT1 can be found in the PREFIRE_SAT1_1A-RAD collection.

DOI

10.5067/PREFIRE-SAT2/PREFIRE/RAD_L1A.R00

VIEW RELATED INFORMATION

ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)

PREFIRE_1A-RAD_1B-RAD_ATBD

DATA CITATION GUIDELINES

How to cite ASDC data

GENERAL DOCUMENTATION

PREFIRE-TIRS spectral response function (SRF) files and browse plots.

USER'S GUIDE

PREFIRE_Data_User_Guide_1A-RAD_R00

From GCMD Science Keywords:

EARTH RADIATION BUDGET
UPWELLING LONGWAVE RADIATION > LONGWAVE RADIATION
INFRARED RADIANCE

PREFIRE

Data Distribution

Current Products

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Spatial Information

Spatial Coverage: (S: -84, N: 84), (W: -180, E: 180)
Spatial Coverage Type: Horizontal
Coordinate System: Geodetic
Granule Spatial Representation: Geodetic

Locations

GLOBAL POLAR ARCTIC

Temporal Information

Temporal Coverage: 2024-06-29 - 2025-04-18

Platforms

Earth Observation Satellites

PREFIRE-SAT2

Polar Radiant Energy in the Far InfraRed Experiment (PREFIRE) Satellite-2

TIRS-PREFIRE

Thermal InfraRed Spectrometer

Metadata Dates

Created on 2023-11-07

Last updated on 2024-05-24