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(abstract) Ulysses Orbit Determination at High Declinations

Show simple item record McElrath, Timothy P. en_US Lewis, George D. en_US 2004-10-05T06:04:31Z 2004-10-05T06:04:31Z 1995-05-16 en_US
dc.identifier.citation Greenbelt, MD en_US
dc.identifier.clearanceno 94-1471 en_US
dc.description.abstract The trajectory of the Ulysses spacecraft carries it over the South polar region of the Sun in mid-1994, albeit at a great distance from the Sun itself. During this time the South Solar latitude of Ulysses' orbit reaches a maximum value of 80.2 degrees, and the geocentric declination reaches a magnitude of over 75 degrees. As a result, a number of unique and interesting events occur, not the least of which being that Ulysses never sets over the Canberra tracking station of the DSN for more than two months. A less obvious aspect of the Sun-spacecraft-Earth geometry during this time is the return of solar-induced nutation to the spin-stabilized Ulysses spacecraft, and the consequent use of active nutation control. Both of these events have significant implications for theory and practice of Ulysses' orbit determination during this period, which is the subject of the proposed paper. en_US
dc.format.extent 133370 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.subject.other orbit determination Ulysses Sun Canberra tracking station nutation spacecraft tracking trajectory en_US
dc.title (abstract) Ulysses Orbit Determination at High Declinations en_US

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