Publication detail

Local quasigeoid model creation from astrogeodetic measurements

MACHOTKA, R. KURUC, M. VOLAŘÍK, T.

Original Title

Local quasigeoid model creation from astrogeodetic measurements

Type

journal article in Web of Science

Language

English

Original Abstract

This article describes the process of creation and testing of a local quasigeoid model using the astrogeodetic method known as astronomical levelling. The process used here was based on astronomical levelling principles combined with the least square adjustment in a triangular network and a common method of surface generation. Using this method, the authors have created a quasigeoid model of a small portion of the city of Brno. This model covers an area of approximately 1x2 km and is based on the astronomically determined vertical deflection at 11 stations. The average distance between the astrogeodetic stations was 500 m, which is an unusually high density (5.5 stations per km2). This high geo-spatial data density input made it possible to generate a quasigeoid model of height difference precision at mm-level over few km. Tests described in this article document the suitability of our methods for creating local quasigeoid models of high precision and resolution. Employing the least square adjustment in a planar network offers the possibility to easily compute standard deviations of both input and result values. This is a great advantage in comparison with more common astrogeodetic quasigeoid profiles, which are not suitable for simple adjustment and require more complex methods to be used for evaluation of their precision. The model described here serves the authors as a technological example, from which they learn more about the potential of the astrogeodetic method. Astrogeodetic models of a much greater extent are planned to be used for validation purposes of models generated by other independent methods (gravimetric, satellite, combined, etc.).

Keywords

geodetic astronomy, astronomical levelling, astrogeodetic quasigeoid determination, vertical deflections

Authors

MACHOTKA, R.; KURUC, M.; VOLAŘÍK, T.

RIV year

2013

Released

1. 1. 2013

Publisher

Springer Netherlands

ISBN

0039-3169

Periodical

STUDIA GEOPHYSICA ET GEODAETICA

Year of study

57

Number

1

State

Czech Republic

Pages from

27

Pages to

46

Pages count

20

URL

https://link.springer.com/content/pdf/10.1007/s11200-012-0717-2.pdf

BibTex

@article{BUT97421,
  author="Radovan {Machotka} and Michal {Kuruc} and Tomáš {Volařík}",
  title="Local quasigeoid model creation from astrogeodetic measurements",
  journal="STUDIA GEOPHYSICA ET GEODAETICA",
  year="2013",
  volume="57",
  number="1",
  pages="27--46",
  doi="10.1007/s11200-012-0717-2",
  issn="0039-3169",
  url="https://link.springer.com/content/pdf/10.1007/s11200-012-0717-2.pdf"
}