In:
Contributions to Geophysics and Geodesy, Walter de Gruyter GmbH, Vol. 40, No. 1 ( 2010-01-1), p. 1-30
Kurzfassung:
Errors of estimated parameters in an adjustment process should be scaled according to the size of the estimated residuals or misclosures. After computing a quasi-geoid (geoid), its biases and tilts, due to existence of systematic errors in the terrestrial data, are removed by fitting a corrective surface to the misclosures of the differences between the GNSS/levelling data and the quasi-geoid (geoid). Variance component estimation can be used to re-scale or calibrate the error of the GNSS/levelling data and the quasi-geoid (geoid) model. This paper uses this method to calibrate the errors of the recent quasi-geoid model, the GNSS and the normal heights of Sweden. Different stochastic models are investigated in this study and based on a 7-parameter corrective surface model and a three-variance component stochastic model, the calibrated error of the quasi-geoid and the normal heights are 6 mm and 5 mm, respectively and the re-scaled error of the GNSS heights is 18 mm.
Materialart:
Online-Ressource
ISSN:
1338-0540
,
1335-2806
DOI:
10.2478/v10126-010-0001-9
Sprache:
Unbekannt
Verlag:
Walter de Gruyter GmbH
Publikationsdatum:
2010
ZDB Id:
2565418-4
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