Editing Deep Space Climate Observatory (section)

=== Instruments ===
==== PlasMag ====
The Plasma-[[Magnetometer]] (PlasMag) measures [[solar wind]] for [[space weather]] predictions. It can provide early warning detection of solar activity that could cause damage to existing satellite systems and ground infrastructure. Because solar particles reach {{L1}} about an hour before Earth, PlasMag can provide a warning of 15 to 60 minutes before a [[coronal mass ejection]] (CME) arrives. It does this by measuring "the magnetic field and the velocity distribution functions of the electron, proton and alpha particles ([[helium]] nuclei) of solar wind".<ref name= "noaa_plasmag"/> It has three instruments:<ref name=noaa_plasmag>{{cite web|title=NOAA Satellite and Information Service: Deep Space Climate Observatory (DSCOVR): Plasma-Magnetometer (PlasMag) |url= http://www.nesdis.noaa.gov/DSCOVR/pdf/DSCOVR%20-%20PlasMag%20Instrument%20Info%20Sheet.pdf| publisher=NOAA|access-date= February 10, 2015|url-status= dead| archive-url= https://web.archive.org/web/20150210181113/http://www.nesdis.noaa.gov/DSCOVR/pdf/DSCOVR%20-%20PlasMag%20Instrument%20Info%20Sheet.pdf|archive-date=February 10, 2015}} {{PD-notice}}</ref>
* Magnetometer measures [[magnetic field]]
* [[Faraday cup]] measures positively [[charged particle]]s
* Electrostatic analyzer measures [[electron]]s

==== EPIC ====
[[File:Earth-DSCOVR-20150706-IFV.jpg|thumb|upright=1.3|right|The first EPIC image, released by NASA on 6 July 2015, shows the full sunlit Earth from {{cvt|1475207|km}} or nearly four [[lunar distance (astronomy)|lunar distances]] away, centered on the [[Americas]].<ref name= "nasa20150720">{{cite web |url= http://www.nasa.gov/image-feature/nasa-captures-epic-earth-image|title=NASA Captures "EPIC" Earth Image| publisher =NASA|first=Karen|last=Northon|date=July 20, 2015}} {{PD-notice}}</ref><ref>{{cite web|url=https://epic.gsfc.nasa.gov/?date=2015-07-06|title=DSCOVR: EPIC| publisher=NASA|date=July 6, 2015| access-date=February 26, 2018}} {{PD-notice}}</ref>]]

The Earth Polychromatic Imaging Camera (EPIC) takes images of the sunlit side of Earth for various Earth science monitoring purposes in ten different channels from [[ultraviolet]] to [[near-infrared]]. [[Ozone]] and [[aerosol]] levels are monitored along with cloud dynamics, properties of the land, and [[vegetation]].<ref name=noaa_epic>{{cite web |title= NOAA Satellite and Information Service: Deep Space Climate Observatory (DSCOVR): Enhanced Polychromatic Imaging Camera (EPIC) |url= http://www.nesdis.noaa.gov/DSCOVR/pdf/DSCOVR%20-%20EPIC%20Instrument%20Info%20Sheet.pdf| publisher=NOAA|date=January 14, 2015|access-date=February 10, 2015|url-status=dead|archive-url= https://web.archive.org/web/20150210181851/http://www.nesdis.noaa.gov/DSCOVR/pdf/DSCOVR%20-%20EPIC%20Instrument%20Info%20Sheet.pdf|archive-date=February 10, 2015}} {{PD-notice}}</ref>

EPIC has an aperture diameter of {{cvt|30.5|cm}}, a [[focal ratio]] of 9.38, a [[field of view]] of 0.61°, and an angular sampling resolution of 1.07 [[arcsecond]]s. Earth's [[apparent diameter]] varies from 0.45° to 0.53° full width. [[Exposure time]] for each of the 10 narrowband channels (317, 325, 340, 388, 443, 552, 680, 688, 764, and 779 [[nanometre|nm]]) is about 40 ms. The camera produces 2048 × 2048 pixel images, but to increase the number of downloadable images to ten per hour the resolution is averaged to 1024 × 1024 on board. The final resolution is {{cvt|25|km|mi|abbr=on|disp=x|/pixel (|/pixel)}}.<ref name=noaa_epic/>

==== NISTAR ====
The National Institute of Standards and Technology Advanced Radiometer (NISTAR) was designed and built between 1999 and 2001 by NIST in Gaithersburg, MD and  [[Ball Aerospace & Technologies]] in [[Boulder, Colorado]]. NISTAR measures irradiance of the sunlit face of the Earth. This means that NISTAR measures if the [[atmosphere of Earth]] is taking in more or less solar energy than it is radiating back towards space. This data is to be used to study changes in Earth's [[radiation budget]] caused by natural and human activities.<ref name=noaa_nistar>{{cite web| title= NOAA Satellite and Information Service: Deep Space Climate Observatory (DSCOVR): National Institute of Standards and Technology Advanced Radiometer (NISTAR)|url=http://www.nesdis.noaa.gov/DSCOVR/pdf/DSCOVR%20-%20NISTAR%20Instrument%20Info%20Sheet.pdf| publisher=NOAA|access-date= February 10, 2015|url-status= dead |archive-url= https://web.archive.org/web/20150422070911/http://www.nesdis.noaa.gov/DSCOVR/pdf/DSCOVR%20-%20NISTAR%20Instrument%20Info%20Sheet.pdf|archive-date=April 22, 2015}} {{PD-notice}}</ref>

Using NISTAR data, scientists can help determine the impact that humanity is having on the atmosphere of Earth and make the necessary changes to help balance the radiation budget.<ref>{{cite web |url= http://www.nasa.gov/content/goddard/noaas-dscovr-nistar-instrument-watches-earths-budget|title=NOAA's DSCOVR NISTAR Instrument Watches Earth's "Budget"|publisher=NASA|last=Jenner|first=Lynn|date=January 20, 2015|access-date=March 12, 2019}} {{PD-notice}}</ref> The radiometer measures in four channels:
* For total radiation in [[ultraviolet]], [[Visible spectrum|visible]] and [[infrared]] in the range 0.2–100&nbsp;μm
* For reflected solar radiation in the ultraviolet, visible and near-infrared in the range 0.2–4&nbsp;μm
* For reflected solar radiation in infrared in the range 0.7–4&nbsp;μm
* For calibration purposes in the range 0.3–1&nbsp;μm