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Fourteen years of resonance of Vanguard orbitsTracking of Vanguard 3 and the Vanguard 2 rocket with Baker-Nunn cameras and the U.S. Navy's Space Surveillance (radio interferometer) system over a 14 year period revealed resonant fluctuations of up to 0.035 deg in inclination (peak to peak). Six geopotential terms (lumped coefficients) of 11th order and three of 22nd order were measured using orbit inclinations derived from this tracking record. The terms of 11th order are significantly smaller than Kaula's rule. (The lumped coefficients are sensitive to geopotential effects as high as 37th degree.) These observed terms are compatible with a recent 27-satellite geopotential solution whose formal coefficient errors are increased by a factor of 3.3.
Document ID
19750023105
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Wagner, C. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
June 1, 1975
Subject Category
Astrodynamics
Report/Patent Number
X-921-75-179
NASA-TM-X-70966
Accession Number
75N31178
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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