The assessment of the celestial body influence on the geodetic measurements

Darius Popovas

Doctoral dissertation

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Description

The research work presents the carried out investigations on the effect of the celestial bodies on the gravity field elements and the analysis was made on the Moon’s and Sun’s effect on the geodetic measurements. The results of the research are advised to be implemented for the assessment of the effect of the celestial bodies regarding the geodetic, measurements as well as when selecting the surfaces of the Earth and geoid and the system of gravity.

The dissertation consists of introduction, four chapters and the summation of the results.

The introduction depicts the topicality of the chosen research, determining the relevance of the investigated issue. There are described the objective of the work as well as the tasks, there is revealed the scientific novelty of the workant etc.

Chapter one deals with the review of the scientific literature. The chapter also presents the analysis of the available methods of the assessment of the Earth’s tides and their accuracies. The scientific literature was analysed extensively in terms of the effect of the celestial bodies on the Earth’s gravity field and on the issues of the geodetic measurements. The problems were indicated concerning the assessment of the effect of the celestial bodies and the tasks were specified for the research work to be investigated.

Chapter 2 deals with the theoretical research. The author presents the analysis of the effect of the members of the series of the tide potential caused by the celestial bodies on the elements of the gravity field such as gravity, vertical and equipotential surface. The research experiments were carried out by applying the horizontal and equatorial coordinates systems.

Chapter 3 deals with the investigations made regarding the Lunisolar effect on the elements of the gravity field, estimating the effect of the constant part of the zonal waves. The equations derived in the second chapter are submitted. The ranges of the changes of the gravity, deflection of the vertical and of the equipotential surface were analysed, as well as the effect of the constant part of the tide.

Chapter 4 deals with the upgraded methodology for the assessment of the effect of the celestial bodies on the geodetic measurements.

The author published 8 articles on the issues of the research made, i.e. four articles in the journals referred at the international data bases; two articles were published in the material referred at the international conferences and two more articles were published in the other sources of the international and domestic conferences, besides, there were made 8 presentations at the conferences.

Read the electronic version of the book:

DOI: https://doi.org/10.20334/1935-M

Book details

Data sheet

Year:
2011
ISBN:
978-609-457-017-9
Imprint No:
1935-M
Dimensions:
160×230 mm
Pages:
136 p.
Cover:
Softcover
Language:
Lithuanian
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