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논문 기본 정보

자료유형
학술저널
저자정보
Dong-Seob Song (성균관대학교) Hong-Sic Yun (성균관대학교)
저널정보
대한토목학회 KSCE JOURNAL OF CIVIL ENGINEERING KSCE JOURNAL OF CIVIL ENGINEERING Vol.11 No.4
발행연도
2007.7
수록면
193 - 198 (6page)

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초록· 키워드

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GPS is an essential tool in positioning which requires high precision such as velocity field estimation of tectonic plates. However it takes long time for this kind GPS solutions because of defective automatic GPS data processing system. Therefore, it is important that the determination of GPS data processing interval to obtain requisite accuracy in a study of crustal deformation parameter estimation. So, the Gipsy-Oasis Ⅱ software was used to estimate daily deformation of GPS stations with orbital and atmospheric parameters and least square linear fitting technique was used to estimate the velocity of the GPS stations. In this relative solution of daily positioning, the standard deviation which is scale of precision turned out better than 4mm. In this study, to determine the optimal time-interval for a crustal deformation estimation, three kinds of time-interval was adopted, which is 2-day, 5-day and 10-day time-interval and were compared to daily solutions by the standard deviation of velocity from the calculation results. Research results shows that the Std of the horizontal crustal motion parameter was 1.44 times (Std=±0.66㎜/yr), 2.24 times (Std=±1.03㎜/yr) and 3.20 times (Std=±1.47㎜/yr) worse than the Std used to obtain of the daily positioning result (Std=±0.46㎜/yr). The crustal motion magnitude varied irregularly for the 2-day interval. So, we made conclusion that the 2-day interval can be applied to process GPS data for rapid velocity field estimation.

목차

Abstract
1. Introduction
2. GPS Data Collection and Processing
3. Estimation of the Velocity Parameter and Determination of the Processing Interval
4. Conclusions
References

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