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Titolo:
The statistical relationship of the observed gravity anomalies with height, and their comparison with the model-predicted anomalies in Taiwan Island
Autore:
Kao, SP;
Indirizzi:
Natl Chung Hsing Univ, Dept Civil Engn, Taichung 402, Taiwan Natl Chung Hsing Univ Taichung Taiwan 402 vil Engn, Taichung 402, Taiwan
Titolo Testata:
JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS
fascicolo: 2, volume: 23, anno: 2000,
pagine: 223 - 228
SICI:
0253-3839(200003)23:2<223:TSROTO>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Keywords:
free-air anomalies; geopotential; root mean square;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
7
Recensione:
Indirizzi per estratti:
Indirizzo: Kao, SP Natl Chung Hsing Univ, Dept Civil Engn, Taichung 402, Taiwan Natl Chung Hsing Univ Taichung Taiwan 402 , Taichung 402, Taiwan
Citazione:
S.P. Kao, "The statistical relationship of the observed gravity anomalies with height, and their comparison with the model-predicted anomalies in Taiwan Island", J CHIN I EN, 23(2), 2000, pp. 223-228

Abstract

This study examines the approximately linear relation between free-air anomalies and topographic heights in Taiwan Island. The resulting statistics shows that there is not a significant linear relation in plain regions, and a strongly, significant linear relation in mountainous regions between the free-air anomalies and elevations. There are 15 independently observed gravity values were used to check the correlation and evaluate the accuracy of prediction. It has been found that the differences between observed and predicted free-air (or bouguer) gravity anomalies in mountainous regions have a mean and standard deviation of -2.23+/-9.95 mgals. The global geopotential free-air anomalies on GRS80 for Taiwan Island have also been predicted using the OSU91A geopotential coefficient set up to degree and order 360. Comparisons have been made between these free-air anomalies determined from the OSU91A1F geopotential coefficient set, and terrestrial point gravity anomalies. It has also been found that the mean difference between the OSU91A model derived anomalies and 243 actual point free-air anomalies is 16.8 mgalwith a root mean square error of 48 mgal. The significantly linear relation, between free-air anomalies and elevations in mountainous regions, obtained from this study can help to predict the needed gravity anomalies for rigorous orthometric correction used in precise leveling of Taiwan Island.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 05:37:08