Accession Number:

AD0753064

Title:

Ueber die Genauigkeit der Differentiellen Bahnbestimmung aus Radiointerferometermessungen am Beispiel der Transferbahn von SYMPHONIE (The Accuracy of the Differential Orbit. Determination from Radio Interferometer Measurements, for example, the Transfer Orbit of SYMPHONIE),

Descriptive Note:

Corporate Author:

DEUTSCHE FORSCHUNGS- UND VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V OBERPFAFFENHOFEN (WEST GERMANY)

Personal Author(s):

• Leibold,A.
• Zimmermann,K.

Report Date:

1972-01-01

Pagination or Media Count:

10.0

Abstract:

Under the assumption that the Weighted Least Squares Method is applied in the Satellite Orbit Determination Process, the mathematical formalism for calculating the covariance matrix of the estimated orbit parameters is derived. The tracking data may contain random errors as well as systematic errors. For this investigation the systematic errors are assumed to be caused by insufficient atmospherid refraction correction and deficiencies of the tracking device. However, the calculation method which is outlined can be applied in an analogous way to additional systematic errors as well e.g. errors of the station coordinates, gravitational parameter errors etc.. This procedure was programmed on a digital computer and used for estimating the orbit determination accuracies which could be obtained in the apogee of the transfer orbit of SYMPHONIE. The results are presented and compared with the errors arising during the orbit correction phase at the apogee. Author

Descriptors:

• *ORBITS
• MATHEMATICAL PREDICTION
• COMMUNICATION SATELLITES
• SATELLITE TRACKING SYSTEMS
• ERRORS
• TRANSFER TRAJECTORIES
• POSITION FINDING
• LEAST SQUARES METHOD
• WEST GERMANY

Subject Categories:

• Spacecraft Trajectories and Reentry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE