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| DSCOVR | |
|---|---|
| Name | DSCOVR |
| Mission type | Earth observation, solar wind monitoring |
| Operator | National Oceanic and Atmospheric Administration / National Aeronautics and Space Administration / United States Air Force |
| Cospar id | 2015-003A |
| Satcat | 40395 |
| Manufacturer | Ball Aerospace |
| Launch mass | 570 kg |
| Launch date | 2015-02-11 |
| Launch vehicle | Falcon 9 |
| Launch site | Cape Canaveral Air Force Station |
| Orbit | Sun–Earth Lagrange point L1 halo orbit |
DSCOVR DSCOVR is a spaceborne observatory positioned near the Sun–Earth Lagrange point L1 to provide continuous measurements of solar wind, space weather, and whole-disk Earth imagery. The mission was developed through a partnership among National Oceanic and Atmospheric Administration, National Aeronautics and Space Administration, and the United States Air Force to enhance forecasting for geomagnetic storms and to supply unique Earth observations. DSCOVR provided a suite of data streams used by operational centers like the Space Weather Prediction Center and research groups at institutions such as NASA Goddard Space Flight Center and NOAA National Centers for Environmental Information.
DSCOVR was conceived to replace capabilities lost with the aging Advanced Composition Explorer and to augment the SOHO capability for upstream solar wind measurements and Earth imaging. The spacecraft operates at the Sun–Earth Lagrange point L1, approximately 1.5 million kilometers from Earth toward Sol; this vantage point enables near-real-time warning of interplanetary disturbances impacting the magnetosphere and ionosphere. DSCOVR combines particle and field sensors with an Earth-viewing optical payload to produce data streams used by agencies such as United States Geological Survey and research centers including Jet Propulsion Laboratory and Los Alamos National Laboratory.
DSCOVR originated from concepts proposed during the 1990s and 2000s to modernize solar wind monitoring capability following missions like ACE and WIND. Following selection and redesign, the spacecraft was acquired by NOAA and refurbished by Ball Aerospace before a 2015 launch aboard a SpaceX Falcon 9 from Cape Canaveral Air Force Station. The mission timeline includes deployments to an L1 halo orbit with station-keeping supported by trajectory design expertise from NASA Jet Propulsion Laboratory and operations transitioned to NOAA's Satellite Operations Facility while science coordination involved teams at NASA Goddard Space Flight Center. DSCOVR has continued to operate beyond its nominal lifetime, supporting long-term studies by groups at Princeton University, University of Colorado Boulder, and University of California, Berkeley.
The DSCOVR platform hosts a compact bus built by Ball Aerospace and a payload suite including the PlasMag package for solar wind composition and magnetic field measurements and a multi-channel imaging system known as the EPIC instrument and the NISTAR radiometer. PlasMag integrates a Faraday cup heritage design used on ACE and charged particle analyzers used on Ulysses and WIND; it measures proton and alpha particle bulk parameters, electron flux, and composition including heavy ions relevant to studies by Los Alamos National Laboratory and University of Michigan. The EPIC camera provides 10 narrowband filters covering ultraviolet to near-infrared wavelengths for whole-disk Earth images used by climate groups at NOAA National Centers for Environmental Information and NASA Goddard Institute for Space Studies, while NISTAR measures total and reflected solar irradiance for radiative forcing studies by teams at National Renewable Energy Laboratory and Columbia University.
DSCOVR operations are coordinated by NOAA Satellite Operations Facility with science processing pipelines maintained by NASA Goddard Space Flight Center and distribution nodes at NOAA National Centers for Environmental Information. Solar wind data from PlasMag are forwarded in near-real time to the Space Weather Prediction Center, United States Air Force Weather Agency, and international centers including the European Space Agency's space weather services. EPIC images are processed into calibrated reflectance, color composites, and derived products such as aerosol optical depth and cloud fraction employed by researchers at University of Maryland, Massachusetts Institute of Technology, and Purdue University. NISTAR data contribute to long-term solar irradiance records used in assessments by Intergovernmental Panel on Climate Change authors and climate modelers at NOAA Geophysical Fluid Dynamics Laboratory.
DSCOVR has advanced understanding of heliophysics, terrestrial albedo, and extreme events. Solar wind measurements have been used to refine empirical models for predicting geomagnetic storm onset, improving forecast lead times at the Space Weather Prediction Center and informing alerts for infrastructure stakeholders including North American Electric Reliability Corporation and satellite operators at Lockheed Martin and Boeing. EPIC’s full-disk, multi-spectral time series enabled studies of diurnal albedo variations, cloud dynamics, and vegetation phenology informing publications by International Journal of Remote Sensing authors and climate groups at Scripps Institution of Oceanography. NISTAR’s irradiance observations contributed to continuity in the solar constant record used by the World Climate Research Programme.
Although operated by NOAA and supported by NASA and the United States Air Force, DSCOVR data are shared globally with entities such as the European Space Agency, Japan Aerospace Exploration Agency, Canadian Space Agency, and research institutions at University of Oxford and ETH Zurich. Collaborative projects have included cross-calibrations with instruments on SOHO, ACE, and GOES satellites, and joint science campaigns with teams at Max Planck Institute for Solar System Research and Laboratoire de Météorologie Dynamique.
EPIC images were released to the public via platforms managed by NASA and NOAA, attracting attention from media outlets such as The New York Times, BBC News, and National Geographic. Educational programs by Smithsonian Institution and outreach efforts with American Geophysical Union used DSCOVR data in classroom activities and citizen science projects coordinated with Zooniverse. The mission’s continuous Earth imagery has been showcased in exhibits at institutions including National Air and Space Museum and used in documentaries produced by PBS and Discovery Channel.