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Accession Number ADA564429
Title Correlated and Zonal Errors of Global Astrometric Missions: A Spherical Harmonic Solution.
Publication Date Jul 2012
Media Count 8p
Personal Author B. N. Dorland C. T. Berghea G. S. Hennessy R. A. Gaume V. V. Makarov
Abstract We propose a computer-efficient and accurate method of estimating spatially correlated errors in astrometric positions, parallaxes, and proper motions obtained by space- and ground-based astrometry missions. In our method, the simulated observational equations are set up and solved for the coefficients of scalar and vector spherical harmonics representing the output errors rather than for individual objects in the output catalog. Both accidental and systematic correlated errors of astrometric parameters can be accurately estimated. The method is demonstrated on the example of the JMAPS mission, but can be used for other projects in space astrometry, such as SIM or JASMINE.
Keywords Accuracy
Ground based
Space based
Spherical astronomy
Spherical harmonics
Vector analysis

Source Agency Non Paid ADAS
NTIS Subject Category 72B - Algebra, Analysis, Geometry, & Mathematical Logic
Corporate Author Naval Observatory, Washington, DC.
Document Type Journal article
Title Note Journal article.
NTIS Issue Number 1303
Contract Number N/A

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