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 V02

DSCOVR Public Release Statement V02

Wednesday, July 12, 2017

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 at 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 calibration factors that convert counts/sec into energy units (W/m2/nm/sr) are also provided.  The released datasets have (L1A) instrument calibrations, flat-fielding, stray-light correction and (L1B) geolocation applied.  


The release of Level 1 NISTAR data provides 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. Absolute calibration parameters are provided.


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


NOAA releases data from the space weather instruments. The data, as well as space weather forecasts with a 30-45 minute lead-time is available via the Space Weather Prediction Center at