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dc.contributor.authorMarshak, Alexanderen_US
dc.contributor.authorHerman, Jayen_US
dc.contributor.authorSzabo, Adamen_US
dc.contributor.authorBlank, Karinen_US
dc.contributor.authorCarn, Simonen_US
dc.contributor.authorCede, Alexanderen_US
dc.contributor.authorGeogdzhayev, Igoren_US
dc.contributor.authorHuang, Dongen_US
dc.contributor.authorHuang, Liang-Kangen_US
dc.contributor.authorKnyazikhin, Yurien_US
dc.contributor.authorKowalewski, Matthewen_US
dc.contributor.authorKrotkov, Nickolayen_US
dc.contributor.authorLyapustin, Alexeien_US
dc.contributor.authorMcPeters, Richarden_US
dc.contributor.authorMeyer, Kerry G.en_US
dc.contributor.authorTorres, Omaren_US
dc.contributor.authorYang, Yuekuien_US
dc.date.accessioned2019-02-12T18:50:42Z
dc.date.available2019-02-12T18:50:42Z
dc.date.issued2018-09-01
dc.identifierhttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000448508300009&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=6e74115fe3da270499c3d65c9b17d654
dc.identifier.citationAlexander Marshak, Jay Herman, Adam Szabo, Karin Blank, Simon Carn, Alexander Cede, Igor Geogdzhayev, Dong Huang, Liang-Kang Huang, Yuri Knyazikhin, Matthew Kowalewski, Nickolay Krotkov, Alexei Lyapustin, Richard McPeters, Kerry G Meyer, Omar Torres, Yuekui Yang. 2018. "EARTH OBSERVATIONS FROM DSCOVR EPIC INSTRUMENT." BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY, Volume 99, Issue 9, pp. 1829 - 1850 (22). https://doi.org/10.1175/BAMS-D-17-0223.1
dc.identifier.issn0003-0007
dc.identifier.issn1520-0477
dc.identifier.urihttps://hdl.handle.net/2144/33320
dc.description.abstractThe National Oceanic and Atmospheric Administration (NOAA) Deep Space Climate Observatory (DSCOVR) spacecraft was launched on 11 February 2015 and in June 2015 achieved its orbit at the first Lagrange point (L1), 1.5 million km from Earth toward the sun. There are two National Aeronautics and Space Administration (NASA) Earth-observing instruments on board: the Earth Polychromatic Imaging Camera (EPIC) and the National Institute of Standards and Technology Advanced Radiometer (NISTAR). The purpose of this paper is to describe various capabilities of the DSCOVR EPIC instrument. EPIC views the entire sunlit Earth from sunrise to sunset at the backscattering direction (scattering angles between 168.5° and 175.5°) with 10 narrowband filters: 317, 325, 340, 388, 443, 552, 680, 688, 764, and 779 nm. We discuss a number of preprocessing steps necessary for EPIC calibration including the geolocation algorithm and the radiometric calibration for each wavelength channel in terms of EPIC counts per second for conversion to reflectance units. The principal EPIC products are total ozone (O3) amount, scene reflectivity, erythemal irradiance, ultraviolet (UV) aerosol properties, sulfur dioxide (SO2) for volcanic eruptions, surface spectral reflectance, vegetation properties, and cloud products including cloud height. Finally, we describe the observation of horizontally oriented ice crystals in clouds and the unexpected use of the O2 B-band absorption for vegetation properties.en_US
dc.description.sponsorshipThe NASA GSFC DSCOVR project is funded by NASA Earth Science Division. We gratefully acknowledge the work by S. Taylor and B. Fisher for help with the SO<INF>2</INF> retrievals and Marshall Sutton, Carl Hostetter, and the EPIC NISTAR project for help with EPIC data. We also would like to thank the EPIC Cloud Algorithm team, especially Dr. Gala Wind, for the contribution to the EPIC cloud products. (NASA Earth Science Division)en_US
dc.format.extentp. 1829-1850en_US
dc.languageEnglish
dc.language.isoen_US
dc.publisherAmer Meteorological Socen_US
dc.relation.ispartofBULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY
dc.subjectScience & technologyen_US
dc.subjectPhysical sciencesen_US
dc.subjectMeteorology & atmospheric sciencesen_US
dc.subjectOzon mapping spectrometeren_US
dc.subjectAbsorption cross-sectionsen_US
dc.subjectOriented ice crystalsen_US
dc.subjectVolcanic ash cloudsen_US
dc.subjectSulfur-dioxideen_US
dc.subjectCirrus cloudsen_US
dc.subjectSatellite measurementsen_US
dc.subjectRadiative transferen_US
dc.subjectTheoretical basisen_US
dc.subjectUV spectroscopyen_US
dc.subjectAstronomical and space sciencesen_US
dc.subjectAtmospheric sciencesen_US
dc.subjectMeteorology & atmospheric sciencesen_US
dc.titleEarth observations from DSCOVR EPIC instrumenten_US
dc.typeArticleen_US
dc.description.versionAccepted manuscripten_US
dc.identifier.doi10.1175/BAMS-D-17-0223.1
pubs.elements-sourceweb-of-scienceen_US
pubs.notesEmbargo: Not knownen_US
pubs.organisational-groupBoston Universityen_US
pubs.organisational-groupBoston University, College of Arts & Sciencesen_US
pubs.organisational-groupBoston University, College of Arts & Sciences, Department of Earth & Environmenten_US
pubs.publication-statusPublisheden_US


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