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dc.contributor.authorMerkowitz, S. M
dc.contributor.authorBolotin, S.
dc.contributor.authorElosegui, P.
dc.contributor.authorEsper, J.
dc.contributor.authorGipson, J.
dc.contributor.authorHilliard, L.
dc.contributor.authorHimwich, E.
dc.contributor.authorHoffman, E. D
dc.contributor.authorLakins, D. D
dc.contributor.authorLamb, R. C
dc.contributor.authorLemoine, F. G
dc.contributor.authorLong, J. L
dc.contributor.authorMcGarry, J. F
dc.date.accessioned2021-09-20T17:17:04Z
dc.date.available2021-09-20T17:17:04Z
dc.date.issued2018-10-06
dc.identifier.urihttps://hdl.handle.net/1721.1/131437
dc.description.abstractAbstract NASA maintains and operates a global network of Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR), and Global Navigation Satellite System ground stations as part of the NASA Space Geodesy Program. The NASA Space Geodesy Network (NSGN) provides the geodetic products that support Earth observations and the related science requirements as outlined by the US National Research Council (NRC in Precise geodetic infrastructure: national requirements for a shared resource, National Academies Press, Washington, 2010. http://nap.edu/12954, Thriving on our changing planet: a decadal strategy for Earth observation from space, National Academies Press, Washington, 2018. http://nap.edu/24938). The Global Geodetic Observing System (GGOS) and the NRC have set an ambitious goal of improving the Terrestrial Reference Frame to have an accuracy of 1 mm and stability of 0.1 mm per year, an order of magnitude beyond current capabilities. NASA and its partners within GGOS are addressing this challenge by planning and implementing modern geodetic stations colocated at existing and new sites around the world. In 2013, NASA demonstrated the performance of its next-generation systems at the prototype next-generation core site at NASA’s Goddard Geophysical and Astronomical Observatory in Greenbelt, Maryland. Implementation of a new broadband VLBI station in Hawaii was completed in 2016. NASA is currently implementing new VLBI and SLR stations in Texas and is planning the replacement of its other aging domestic and international legacy stations. In this article, we describe critical gaps in the current global network and discuss how the new NSGN will expand the global geodetic coverage and ultimately improve the geodetic products. We also describe the characteristics of a modern NSGN site and the capabilities of the next-generation NASA SLR and VLBI systems. Finally, we outline the plans for efficiently operating the NSGN by centralizing and automating the operations of the new geodetic stations.en_US
dc.publisherSpringer Berlin Heidelbergen_US
dc.relation.isversionofhttps://doi.org/10.1007/s00190-018-1204-5en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceSpringer Berlin Heidelbergen_US
dc.titleModernizing and expanding the NASA Space Geodesy Network to meet future geodetic requirementsen_US
dc.typeArticleen_US
dc.contributor.departmentHaystack Observatory
dc.eprint.versionAuthor's final manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2020-09-24T20:46:00Z
dc.language.rfc3066en
dc.rights.holderThis is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply
dspace.embargo.termsY
dspace.date.submission2020-09-24T20:46:00Z
mit.licensePUBLISHER_POLICY
mit.metadata.statusAuthority Work and Publication Information Needed


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