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Observation model and parameter partials for the JPL VLBI parameter estimation software MASTERFIT-1987This report is a revision of the document of the same title (1986), dated August 1, which it supersedes. Model changes during 1986 and 1987 included corrections for antenna feed rotation, refraction in modelling antenna axis offsets, and an option to employ improved values of the semiannual and annual nutation amplitudes. Partial derivatives of the observables with respect to an additional parameter (surface temperature) are now available. New versions of two figures representing the geometric delay are incorporated. The expressions for the partial derivatives with respect to the nutation parameters have been corrected to include contributions from the dependence of UTI on nutation. The authors hope to publish revisions of this document in the future, as modeling improvements warrant.
Document ID
19880009139
Document Type
Contractor Report (CR)
Authors
Sovers, O. J. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Fanselow, J. L. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
September 5, 2013
Publication Date
December 15, 1987
Subject Category
ASTRONOMY
Report/Patent Number
JPL-PUBL-83-39-REV-3
NASA-CR-182524
NAS 1.26:182524
Funding Number(s)
PROJECT: RTOP 314-30-41-81-35
CONTRACT_GRANT: NAS7-918
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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