Detail publikace

Local quasigeoid model creation from astrogeodetic measurements

MACHOTKA, R. KURUC, M. VOLAŘÍK, T.

Originální název

Local quasigeoid model creation from astrogeodetic measurements

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.).

Klíčová slova

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

Autoři

MACHOTKA, R.; KURUC, M.; VOLAŘÍK, T.

Rok RIV

2013

Vydáno

1. 1. 2013

Nakladatel

Springer Netherlands

ISSN

0039-3169

Periodikum

STUDIA GEOPHYSICA ET GEODAETICA

Ročník

57

Číslo

1

Stát

Česká republika

Strany od

27

Strany do

46

Strany počet

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"
}