ASDC | DSCOVR_NISTAR_L1A

DSCOVR Level 1A

Entry Title: Deep Space Climate Observatory National Institute of Standards and Technology Advanced Radiometer Level 1A Radiance, Version 3

Entry ID: DSCOVR_NISTAR_L1A_3

Radiation Budget

Description

DSCOVR_NISTAR_L1A is the Deep Space Climate Observatory (DSCOVR) National Institute of Standards & Technology Advanced Radiometer (NISTAR) Level 1A Radiance, Version 3 data product.

NISTAR is a 4-band radiometer onboard THE National Oceanic and Atmospheric Administration's (NOAA) DSCOVR spacecraft located at the Earth-Sun Lagrange-1 (L-1) point, from which vantage it continuously measures the reflected and emitted radiances of the sunlit face of the Earth. These measurements provide an accurate energy balance measurement that improves our understanding of the Earth's radiation budget.

NISTAR employs three electrical substitution radiometers and a photodiode to measure reflected sunlight and infrared emission from the Earth. NISTAR measures the absolute irradiance integrated over the entire sunlit face of Earth in four broadband channels minute-by-minute. NISTAR has a 1º field of view (FOV) that acts as one large pixel that encompasses the entire sunlit side of the Earth and a 7º field of regard.

The four measurement bands and their uses are:

1) Total Radiation – 0.2 µm to 100 µm: total radiant power in the UV, visible, and infrared wavelengths emerging from Earth.

2) Total Solar Reflected – 0.2 µm to 4 µm: reflected solar radiance in UV, visible, and near-infrared wavelengths from Earth.

3) Near Infrared Solar Reflected – 0.7 µm to 4 µm: reflected near-infrared solar radiation from Earth.

4) Photodiode – 0.2 µm to 1.1 µm: tracks the stability of the filters and verifies co-alignment of NISTAR and EPIC.

The Level 1A products have been converted to engineering units but retain one-to-one associations with the items in the raw telemetry from which they were derived. These data products are in HDF5 format.

DOI

10.5067/NISTAR/DSCOVR/L1A.003

Citation Styles for this Dataset

Resources and Documentation

Earthdata Forum

PROJECT HOME PAGE

VIEW RELATED INFORMATION

DATA CITATION POLICY

How to cite ASDC data

DATA QUALITY

NISTAR Data Quality Report, May 17, 2019
NISTAR Quality Report -Version 1 June 28th, 2016

INSTRUMENT/SENSOR CALIBRATION DOCUMENTATION

DSCOVR Earth Science Instrument Overview

PROCESSING HISTORY

USER'S GUIDE

National Institute of Standards and Technology Advanced Radiometer (NISTAR) User’s Guide - September 9, 2015 For the Flight Operations Team

From GCMD Science Keywords:

ATMOSPHERIC RADIATION
SOLAR IRRADIANCE

Aperture
Earth Irradiance
Lunar Irradiance
Temperature

Data Distribution

File Format(s):

HDF5

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Spatial Information

Spatial Coverage: (S: -90, N: 90), (W: -180, E: 180)
Spatial Coverage Type: Not provided
Coordinate System: Cartesian
Granule Spatial Representation: Cartesian

Locations

GLOBAL

Temporal Information

Temporal Coverage: 2017-01-31 - Present

Platforms

Solar/Space Observation Satellites

DSCOVR

Deep Space Climate Observatory

NISTAR

National Institute of Standards and Technology Advanced Radiometer

Metadata Dates

Created on 2020-04-08

Last updated on 2023-08-17