Solar radiation enters the Earth's atmosphere with a portion being scattered by clouds and aerosols.

Processing, archiving and distributing Earth science data
at the NASA Langley Research Center

DSCOVR Public Release Statement

DSCOVR Public Release Statement

Wednesday, July 20, 2016

The Deep Space Climate Observatory (DSCOVR) is a NOAA/NASA mission located near the Earth-Sun Lagrange point (L1) where it performs its primary objective of monitoring the solar wind as well as observing the Earth from sunrise to sunset with two Earth Science sensors: the Earth Polychromatic Imaging Camera (EPIC) and the National Institute of Standards and Technology (NIST) Advanced Radiometer (NISTAR).  The Earth sensors measure the broadband radiative fluxes of the entire dayside of Earth (NISTAR) as well as key spectral radiative characteristics in 10 narrowband channels (between 317 and 790 nm) at 10-20 km spatial resolution (EPIC).  Information about mission and instruments is available in the ASDC DSCOVR Overview Guide as well as


The DSCOVR project, together with the DSCOVR Earth Sensors science team and the NASA Langley Atmospheric Science Data Center (ASDC), announce the release of both Earth sensors Level 1 data.  The release of Level 1 EPIC data provides 10 channel spectral radiances in counts/sec units.  The preliminary calibration factors that convert counts/sec into reflectance units are also provided.  The released datasets have initial versions of instrument calibration and geolocated applied but are not yet stray-light corrected. The stray-light corrected data will be released in the next version (~ Fall, 2016).  


The Level 1 NISTAR data will provide irradiance measures in three broadband ranges from three active cavity radiometers. The total channel measures both solar reflected and Earth thermal radiation, the shortwave channel extracts the solar reflected irradiance, and the third channel is limited to the near infrared solar reflected signal. The fourth detector is a high signal-to-noise photodiode spanning UV, Visible, and Near IR frequencies. Preliminary absolute calibration parameters are provided.


The released data is available from June 2015 through the current day from the ASDC via Earthdata Search.  Color imagery can be seen at  New Level 1 data will be released approximately 24-36 h after observations.  Information about data can be found in the EPIC Data Format Control Book and in the NISTAR Data Format Control Book


NOAA will release data from the space weather instruments on July 27th. The data, as well as space weather forecasts with a 30-45 minute lead-time will be available via the Space Weather Prediction Center at