A generalized method of estimating star corrections from latitude and time observations

Title:

A generalized method of estimating star corrections from latitude and time observations

Creator:

Hefty, Ján

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:b2208a6d-372b-4717-8f64-088d5c82972d
uuid:b2208a6d-372b-4717-8f64-088d5c82972d

Subject:

astronomical latitude-longitude measurements and estimating star corrections

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Long periods of regular astronomical latitude-longitude measurements on observatories participating in determination of Earth´s rotation parameters are frequently used for estimation of corrections to star catalogue mean places and proper motions. The proposed method is the extension and generalization of the usually exploited chain method. It is possible to estimate simultaneously the corrections of declinations and right ascensions for instruments which determine both latitude and longitude. Additional unknowns - amplitudes of short-periodic terms (e.g. corrections to nutation amplitudes, tidal variations, nearly diurnal polar motion, instrumental parameters and refraction anomalies) can be included into total adjustment. It is not necessary to fulfil the condition of closing the chain. The constraint for unknown parameters is the minimum of choosen guadratic form. The problem is solved by using the theory of generalized inverse of matrices. The method is demonstrated on determination of the right ascension corrections from observations with visual transit instrument. Another applications of proposed method are outlined.

Language:

Czech

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Coverage:

197-199

Source:

Publications of the Astronomical Institute of the Academy of Sciences of the Czech Republic | 1987 Volume:63-70 | Number:68

Harvested from:

CDK

Metadata only:

false