Improvement of the Hungarian National Geodetic Control Network

des Instituts für Geodäsie

Heft 20-1/1985

Improvement of the Hungarian National Geodetic Control Network by Satellite Doppler Positioning

István JOÓ
National Office of Lands and Mapping, Budapest / Hungary

József ÁDÁM / Árpád CZOBOR / Szabolcs MIHÁLY
Satellite Geodetic Observatory, Budapest / Hungary


In: WELSCH, Walter M. / LAPINE, Lewis A. (Hrsg.) [1985]:
International Federation of Surveyors - FIG -
Proceedings Inertial, Doppler and GPS Measurements for National and Engineering Surveys
Joint Meeting of Study Groups 5B and 5C, July 1-3, 1985

Schriftenreihe Universitärer Studiengang Vermessungswesen, Universität der Bundeswehr München, Heft 20-1, Neubiberg, S. 145-161.


In the course of the establishment of the new and advanced geodetic control systems in Hungary, a new geodetic datum identified here as the Hungarian Datum 1972 /HD72/ was introduced. An independent readjustment of our astrogeodetic network was performed in 1972 by using the retation ellipsoid of the Geodetic Reference System 1967. The HD72 refers to a reference coordinate system located and oriented relatively at the initial terrestrial point Szőlőhegy.

In early of 1980's the Satellite Geodetic Observatory has developed plans to carry out satellite Doppler observations at our primary control network. In a modernization frame of the National Office of Lands and Mapping, in 1980 and 1982 Hungarian Doppler Observation Campaigns /HDOC80 and HDOC82/ were carried out in order to check scale and orientation of the terrestrial network as well as to determine an appropriate set of transformation parameters between HD72 system and both the HDOC80 and HDOC82 Doppler systems. Satellite Doppler observations of both campaigns HDOC80 and HDOC82 were processed by using the home developed SADOSA and the GEODOP-III program systems.

The paper involves an outline of the structure, main characteristics and some results on the accuracy incestigations of our primary control and satellite Doppler networks. A short outline is ghiven about our plans for development of the Hungarian geodetic controls to fulfil the requirements of the integrated geodesy.

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