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  • 1970-1974  (4)
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  • 1
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    Satellite orbit determination (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: A historic account of the activities of the Satellite OD Group during the MM'71 mission is given along with an assessment of the accuracy of the determined orbit of the Mariner 9 spacecraft. Preflight study results are reviewed, and the major error sources described. Tracking and data fitting strategy actually used in the real time operations is itemized, and Deep Space Network data available for orbit fitting during the mission and the auxiliary information used by the navigation team are described. A detailed orbit fitting history of the first four revolutions of the satellite orbit of Mariner 9 is presented, with emphasis on the convergence problems and the delivered solution for the first orbit trim maneuver. Also included are a solution accuracy summary, the history of the spacecraft orbit osculating elements, the results of verifying the radio solutions with TV imaging data, and a summary of the normal points generated for the relativity experiment.
    Keywords: SPACE SCIENCES
    Type: Its Mariner 9 Navigation; p 119-192
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Long arc orbit determination for Mariner 9 using combined radio and optical data types (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Results of postflight orbit determination for the Mariner 9 trajectory (Mariner-Mars 1971 mission) using Doppler data combined with optical data in the form of TV photographs of the natural satellites and Mars' surface features. It is shown that the combined data yield a solution which is a factor of 3 to 5 better than that obtained from Doppler-only solutions for the node of the orbit relative to the plane perpendicular to the Earth-Mars line. Consequently, these optical data types have a demonstrated potential to significantly improve planetary orbiter navigation accuracies.
    Keywords: NAVIGATION
    Type: AIAA PAPER 74-829 , Mechanics and Control of Flight Conference; Aug 05, 1974 - Aug 09, 1974; Anaheim, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Topographical coordinates from Mariner 9 observations of the Martian surface (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Results of Mariner 9 determinations of the coordinates of selected topographical features on Mars. An attempt is made to project uncertainties in such determinations, together with uncertainties in spin-rate and in the inertial orientation of the spin axis of Mars, to some epoch in the distant future, and, to examine the impact of further imaging data from a Mars synchronous orbiter in reducing the uncertainty of the location of any given surface feature on the planet relative to the orbiter. The effect of residual navigational uncertainties, and uncertainties in celestial orientation of the imaging system, on such determinations is discussed.
    Keywords: SPACE SCIENCES
    Type: AAS PAPER 73-251 , Astrodynamics Conference; Jul 16, 1973 - Jul 18, 1973; Vail, CO; US
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Cartography and orbit determination using TV data from a Mars orbiting spacecraft (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Mars surface cartography and orbit determination using TV data from Mars orbiting spacecraft
    Keywords: SPACE SCIENCES
    Type: AAS PAPER 71-373 , ASTRODYNAMICS SPECIALISTS CONFERENCE; Aug 17, 1971 - Aug 19, 1971; FT. LAUDERDALE, FL; US
    Format: text
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    NASA TECHNICAL REPORTS
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