+ Visit NASA.gov + Contact NASA   + Home Select Search Field * All Report - Patent Number Abstract *Accession Number *NASA Center *Author NameDocument IDKeywordsPublication Date *Title * Find Results With All of the words At least one of the words Enter Search Term  within returned results    Search Tips: Use only the fields with * to search NIX collection. Enclose terms in double quotation marks (") to search for exact phrases, ie: "space shuttle". NOTE: Commas and dashes are removed from search term by search engine. Select Reset Search button to start a new search. See Help for more tips. + NASA Center + Publication Year + Subject + Availability Options + Item/Media Type Selected Navigations: Author > Jacobson, R. A. [x] Sort results by: NASA Center | Date Added to NTRS | Publication Year There are a total of 68 record(s) matching your query. Sorted by: Date Added To NTRS in Descending order 1 2 3 4 5 6 7 Next  Performance of differenced range data types in Voyager navigation Author(s): Taylor, T. H.; Campbell, J. K.; Jacobson, R. A.; Moultrie, B.; Nichols, R. A., Jr.; Riedel, J. E. Abstract: Voyager radio navigation made use of a differenced rage data type for both Saturn encounters because of the low declination singularity of Doppler data. Nearly simultaneous two-way range from two-station baselines was ... NASA Center: Jet Propulsion Laboratory Publication Year: 1982 Added to NTRS: 2008-11-10 Accession Number: 83N14329; Document ID: 19830006058 Revised Orbits of Saturn's Small Inner Satellites Author(s): Jacobson, R. A.; Spitale, J.; Porco, C. C.; Beurle, K.; Cooper, N. J.; Evans, M. W.; Murray, C. D. Abstract: We have updated the orbits of the small inner Saturnian satellites using additional Cassini imaging observations through 2007 March. Statistically significant changes from previously published values appear in the ... NASA Center: Jet Propulsion Laboratory Publication Year: 2007 Added to NTRS: 2008-09-24 Document ID: 20080036079 JPL's On-Line Solar System Data Service Author(s): Giorgini, J. D.; Yeomans, D. K.; Chamberlin, A. B.; Chodas, P. W.; Jacobson, R. A.; Keesey, M. S.; Lieske, J. H.; Ostro, S. J.; Standish, E. M.; Wimberly, R. N. Abstract: No Abstract Available NASA Center: Jet Propulsion Laboratory Publication Year: 1996 Added to NTRS: 2006-12-25 Document ID: 20060036597 Astrographic Observations of Pheobe from Voyager 2 Author(s): Jacobson, R. A. Abstract: This article provides the reduced astrographic observations of the ninth Saturnian satellite, Pheobe, derived from star-satellite imaging data acquired by the Voyager 2 spacecraft. The data set contains 8 pairs of ... NASA Center: Jet Propulsion Laboratory Publication Year: 1996 Added to NTRS: 2006-12-25 Document ID: 20060036584 The Orbit of Pheobe from Earthbased and Voyager Observations Author(s): Jacobson, R. A. Abstract: This article presents the results of a fit of a numerically integrated orbit for the Saturnian satellite Pheobe to Earthbased astrometric observations (from 1904 to 1996) and imaging data acquired by the Voyager 2 ... NASA Center: Jet Propulsion Laboratory Publication Year: 1996 Added to NTRS: 2006-12-25 Document ID: 20060036583 Cassini orbit determination performance during the first eight orbits of the Saturn satellite tour Author(s): Antreasian, P. G.; Bordi, J. J.; Criddle, K. E.; Ionasescu, R.; Jacobson, R. A.; Jones, J. B.; MacKenzie, R. A.; Meek, M. C.; Pelletier, F. J.; Roth, D. C.; Roundhill, I. M.; Stauch, J. Abstract: From June 2004 through July 2005, the Cassini/Huygens spacecraft has executed nine successful close-targeted encounters by three major satellites of the Saturnian system. Current results show that orbit determination has ... NASA Center: Jet Propulsion Laboratory Publication Year: 2005 Added to NTRS: 2006-12-25 Document ID: 20060042915; Report Number: AAS 05-312 Natural satellite ephemerides at JPL: a report to the IAU Commission 20 Working Group on natural satellites Author(s): Jacobson, R. A. Abstract: No Abstract Available NASA Center: Jet Propulsion Laboratory Publication Year: 2003 Added to NTRS: 2006-12-25 Document ID: 20060028901 The orbits of Jupiter and its Galilean satellites and the gravity field of the Jovian system Author(s): Jacobson, R. A. Abstract: No Abstract Available NASA Center: Jet Propulsion Laboratory Publication Year: 2001 Added to NTRS: 2006-12-25 Document ID: 20060031394 The gravity field of the Saturnian system Author(s): Jacobson, R. A. Abstract: No Abstract Available NASA Center: Jet Propulsion Laboratory Publication Year: 2003 Added to NTRS: 2006-12-25 Document ID: 20060028855 Atmospheric drag model for Cassini orbit determination during low altitude Titan flybys Author(s): Pelletier, F. J.; Antreasian, P. G.; Bordi, J. J.; Criddle, K. E.; Ionasescu, R.; Jacobson, R. A.; Mackenzie, R. A.; Parcher, D. W.; Stauch, J. R. Abstract: On April 16, 2005, the Cassini spacecraft performed its lowest altitude flyby of Titan to date, the Titan-5 flyby, flying 1027 km above the surface of Titan. This document discusses the development of a Titan atmospheric ... NASA Center: Jet Propulsion Laboratory Publication Year: 2006 Added to NTRS: 2006-12-25 Document ID: 20060043676 1 2 3 4 5 6 7 Next  + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007