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임영빈,고인세 한밭대학교 건설안전기술연구소 2001 건설안전기술논문집 Vol.1 No.-
It is necessary for utilizing the GPS/Leveling method to determine the detailed geoid, and thus many researchers have developed various geopotential models, which are widely used in our community. To obtain the data for this study, 26 GPS observation points including 23 TBL and 3 triangulation points with an approximately 16-㎞ interval were selected from the Andong geographic map with a scale of 1 : 250,000. These data are implemented to the previously developed gravity models : EGM96, OSU91A, and KGEOID. Deviations between geoid calculated from the geopotential models and geoid obtained from GPS observation, based on the assumption that the levels of TBL and triangulation points are correct, are 0.887m∼0.121m in EGM96 model, 0.580m ∼ -0.028m in OSU91A model, and 0.467m ∼ -0.024m in KGEOID model. The average deviations are 0.493m, 0.277m, and 0.195m, respectively and RMS errors are ±0.299m, ±0.152m, and ±0.133m. Although results shows that the KGEOID model has a better accuracy compared to other models, it is though that models used above are still not good for utilizing the GPS/Leveling method. Geoid undulations in the study area are 25.70m on Chungju region in Chungbuk Province and 29.80m on Pohang region in Kyungbuk Province, and deviation isabout 4.10m. The general trend of geoid undulations, however, shows an increasing pattern to the NW-SE direction. It has been also reported that geoid undulations are related with topographic highs and geoid highs, but the low R-squared value (0.01677) calculated in this area suggests that the relationship is very poor. Therefore, it is necessary for the enhancement and establishing the more precise model in appropriate to our countrys terrain to do more geoid related observations, and it is also considered other factors including topography in the field of the detailed geoid studying. Especially, the effect of different materials in the subsurface should be considered and geoid models used in this study would be helpful.
重力 測定값의 Bouguer 異常이 地形에 미치는 影響에 관한 硏究
任永彬 大田開放大學 1986 論文集 Vol.5 No.-
It was need to many study for the Analysis of the characteristics in gravity values. The difference of gravity are the Free-Air Anomaly and Bouguer Anomaly. This study is to analysis of the Bouguer Anomaly distribute for surveying points on the Earth Surface. It will be contribute to the fields of underground Resource and structure of Earth Crust that Analysis and Surveying of the Bouguer Anomaly distribute.
任永彬 大田工業大學 1988 한밭대학교 논문집 Vol.5 No.2
정확하고도 신속한 수평위치 해석의 조정기법들이 다양하게 연구개발되고 있다. 국내에서도 새로운 경위도 원점의 설치와 기설 측지망에 대한 재조정 작업에 정밀 E.D.M에 의한 삼변 측량 조정기법을 적용하고 있으나 아직 대량의 측점을 동시에 조정함에는 많은 문제점이 뒤 따르고 있다. 이에 본 연구에서는 복합 측지망을 구성하여 각과 거리 요소를 결합시켜 동시에 조정하는 결합조정기법의 해석 알고리즘을 정립하고 각, 거리, 방위각 및 기준점 좌표의 weight 변화에 따른 삼각, 삼변, 결합조정 기법의 특성을 구명, 결합조정 기법의 우월성 및 적용 타당성을 제시함으로써 범국가적 정밀 측지망 설정에 기여코자 한다. 각과 거리의 표준오차를 감소시킴에 따라 오차 분포의 비율을 삼각, 삼변기법이 각각 38.8%, 32.1% 정도의 오차를 나타낸 반면, 결합기법은 29.1%로 나타나므로 결합기법이 보다 우월함을 알 수 있었다. 측정요소의 표준오차를 독립적으로 각각 고려한 경우, 기하학적 표준오차의 감소율은 각 기법이 다양한 변화를 나타내었으나, 동시에 고려한 경우는 일괄성 있는 감소 분포를 나타내므 로, 결합조정의 경우 이상적인 weight factor 를 결정한다면 보다 정확한 수평위치 해석 기 법으로 그 활용이 기대된다. There has been studying and developing about many analytical adjustment methods in determining horizontal positions with precision and economy. In our country, applying trilateration method by means of precise E.D.M to readjustment for existing feodetic network, but we hove a lot of problems yet. The objective of this paper is to propose superiority as well as propriety of combination method considering the characteristics of triangulation, trilateration and combination according as changing the weight of angle, distance, azimuth and control point coordinates in combine geodetic network. Changing the standard errors of distance and angle, the simulation errors of triangulation, trilateration, and combination result in some 38.8%, 32.1%, and 29.1% respectively. As the above, combination method shows more consistent accuracy than other methods. When considering the weight factor about error elements with independence, the diminishing rate of simulated average standard error represents a various change in each method. But considering them simultaneously, it shows a remarkable rate of diminishing in each method. Therefore, determining the reasonable weight factors in the analytical combined method, this method is expected to be more accurate and more effective methods for determining horizontal positions.
임영빈 한밭대학교 산업과학기술연구소 1993 논문집 Vol.1 No.-
During foundation work of building, the judgement of safety to earth wall side in excavation site is very important subject. The relative displacement of earth-wall backside can measure using a measuring instrument such as inclinometer, however it is desirable that derivate absolute deformation measurements by periodic photogrammetric measurements on the absolute coordinate system to obtain these measurements for many points on the structure. This study developed error model of terrestrial C.R.P and presented periodically absolute displacements with combination reference network. In this analysis results, displacement can be taken as good accuracy, it was consistent to measuring result.