Computational Methods Employed with Doppler Observations and Derivation of Geodetic Results

  • Richard J. Anderle
Conference paper

Abstract

The computational model used at the Naval Weapons Laboratory to obtain geodetic data from Doppler observations on satellites is discussed. Some selected problems studied with the method, and discussed in this report, include
  1. (1)

    The effects of bias on the accuracy of the solution and on the validity of statistical tests of the accuracy of the solution.

     
  2. (2)

    The results obtained and the methods of accounting for the effects of tesseral gravitational harmonics such as C 13,13, S 13.13 which produce resonant effects on the satellite motion, and

     
  3. (3)

    the method of determining and representing the significant gravity coefficients.

     
The accuracy of orbit computation currently being achieved as a result of recent improvements in the gravity field representation is shown to be about 50 meters.

Keywords

Satellite Orbit Resonant Effect Beat Period DOPPLER Observation Gravity Parameter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Résumé

On étudie le programme de traitement du “Naval Weapons Laboratory” pour l’obtention de données géodésiques à partir des observations de satellites. On a choisi de discuter les problèmes suivants:
  1. (1)

    L’effet d’une erreur en fréquence sur la précision de la solution et sur la validité des calculs statistiques sur la précision de la solution.

     
  2. (2)

    Les résultats obtenus et les méthodes qui tiennent compte des harmoniques tesseraux du potentiel tels que C 13,13, S 13.13 qui produisent des effets de résonnance sur le mouvement du satellite.

     
  3. (3)

    La méthode qui permet de déterminer et de représenter les coefficients du potentiel les plus significatifs.

     
La précision obtenue dans la détermination de l’orbite est de l’ordre de 50 mètres grace aux améliorations récentes dans la représentation du potentiel.
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References

  1. [1]
    Kaula, W. M.: A Geoid and World Geodetic System Based on a Combination of Gravimetric, Astro-Geodetic, and Satellite Data, NASA T-N D-702 of May 1961.Google Scholar
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    Kaula, W. M.: Improved Geodetic Results from Camera Observations of Satellites, J. Geophys. Res. 68, No. 18 (1963).Google Scholar
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    Izsi, I. G.: Tesserai Harmonics of the Geopotential and Corrections to Station Coordinates, preprint January 1964.Google Scholar
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    Guier, W. H., and R. R. Newton: The Earth’s Gravity Field Deduced from the Doppler Tracking of Five Satellites, Johns Hopkins Univ. Appl. Phys. Labor. TG-634 of December 1964.Google Scholar
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    Anderle, R. J.: Observations of Resonant Effects on Satellite Orbits Arising from the Thirteenth and Fourteenth Order Tesserai Gravitational Coefficients, J. Geophys. Res. in press.Google Scholar
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    Cohen, C. J.: private communication.Google Scholar
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    Sheffield, C.: Solutions for the Circular Orbit Perturbations Produced by Non-Central Potential Terms of the Earth’s Gravitational Field, Computer Usage Company.Google Scholar
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    Kaula, W. M.: Statistical and Harmonic Analysis of Gravity, J. Geophys. Res. 64, No. 12, December 1959.Google Scholar

Copyright information

© Springer Verlag, Berlin/Heidelberg 1966

Authors and Affiliations

  • Richard J. Anderle
    • 1
  1. 1.U.S. Naval Weapons LaboratoryDahlgrenUSA

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