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 2

Entry ID: DSCOVR_NISTAR_L1A_2

Radiation Budget

Description

Deep Space Climate Observatory (DSCOVR) National Institute of Standards & Technology Advanced Radiometer (NISTAR).

NISTAR is a 4-band radiometer onboard NOAA’s 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 to verify co-alignment of NISTAR and EPIC.

The Level 1A products have been converted to engineering units, but retain their 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.002

VIEW RELATED INFORMATION

DATA CITATION GUIDELINES

How to cite ASDC data

DATA QUALITY

NISTAR Data Quality Report, May 17, 2019

INSTRUMENT/SENSOR CALIBRATION DOCUMENTATION

DSCOVR Earth Science Instrument Overview

MICRO ARTICLE

PROCESSING HISTORY

NISTAR Data Format Control Book Specification April 1, 2019
NISTAR Processing Description and Processing Algorithm Overview

Earth Observation Portal Page for DSCOVR Mission Information

USER FEEDBACK PAGE

NASA Goddard Twitter Page

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:

SOLAR IRRADIANCE
ATMOSPHERIC RADIATION

Apperature
Earth Irradiance
Lunar Irradiance
Temperature

Data Distribution

Current Products

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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

Temporal Information

Temporal Coverage: 2015-02-10 - Present

Platforms

Solar/Space Observation Satellites

DSCOVR

Deep Space Climate Observatory

RADIOMETERS

Metadata Dates

Created on 2017-06-28

Last updated on 2020-04-08