|
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
Astronomy
Calibration
Coefficients
Ground based
Missions
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
|
