Comparison of a Neutral Density Model With the SET HASDM Density Database

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dc.contributor.authorWeimer, Daniel R.en
dc.contributor.authorTobiska, W. Kenten
dc.contributor.authorMehta, Piyush M.en
dc.contributor.authorLicata, R. J.en
dc.contributor.authorDrob, Douglas P.en
dc.contributor.authorYoshii, Jeanen
dc.date.accessioned2022-09-12T13:51:45Zen
dc.date.available2022-09-12T13:51:45Zen
dc.date.issued2021-12en
dc.description.abstractThe EXospheric TEMperatures on a PoLyhedrAl gRid (EXTEMPLAR) method predicts the neutral densities in the thermosphere. The performance of this model has been evaluated through a comparison with the Air Force High Accuracy Satellite Drag Model (HASDM). The Space Environment Technologies (SET) HASDM database that was used for this test spans the 20 years 2000 through 2019, containing densities at 3 hr time intervals at 25 km altitude steps, and a spatial resolution of 10 degrees latitude by 15 degrees longitude. The upgraded EXTEMPLAR that was tested uses the newer Naval Research Laboratory MSIS 2.0 model to convert global exospheric temperature values to neutral density as a function of altitude. The revision also incorporated time delays that varied as a function of location, between the total Poynting flux in the polar regions and the exospheric temperature response. The density values from both models were integrated on spherical shells at altitudes ranging from 200 to 800 km. These sums were compared as a function of time. The results show an excellent agreement at temporal scales ranging from hours to years. The EXTEMPLAR model performs best at altitudes of 400 km and above, where geomagnetic storms produce the largest relative changes in neutral density. In addition to providing an effective method to compare models that have very different spatial resolutions, the use of density totals at various altitudes presents a useful illustration of how the thermosphere behaves at different altitudes, on time scales ranging from hours to complete solar cycles.en
dc.description.notesDaniel Weimer was supported by NASA grant 80NSSC20K1362 to Virginia Tech, through the Space Weather Operations-to-Research Program. Kent Tobiska, Piyush Mehta, and Richard Licata were supported by subcontracts to Space Environment Technologies and West Virginia University. Kent Tobiska and J. Yoshii also acknowledge support from the DARPA/Leidos AtmoSense contracts HR001121C0081/P0102500070 to Space Environment Technologies. Douglas Drob was supported by NASA interagency agreement 80HQTR20T0081 with the Naval Research Laboratory. Daniel Weimer had additional support from NSF grant AGS-2019465.en
dc.description.sponsorshipNASA [80HQTR20T0081]; DARPA/Leidos AtmoSense [HR001121C0081/P0102500070]; NASA interagency [80HQTR20T0081]; Naval Research Laboratory; NSF grant [AGS-2019465]en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1029/2021SW002888en
dc.identifier.eissn1542-7390en
dc.identifier.issue12en
dc.identifier.othere2021SW002888en
dc.identifier.urihttp://hdl.handle.net/10919/111799en
dc.identifier.volume19en
dc.language.isoenen
dc.publisherAmerican Geophysical Unionen
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectspace weatheren
dc.subjectthermosphereen
dc.subjectmodelsen
dc.subjectforecastingen
dc.subjectsatellite dragen
dc.titleComparison of a Neutral Density Model With the SET HASDM Density Databaseen
dc.title.serialSpace Weather-The International Journal of Research and Applicationsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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