New Technology for a New Century
International Conference 
FIG Working Week 2001, Seoul, Korea 611 May 2001

Abstracts

DETERMINATION OF LEAST OBSERVATION TIME CLASSIFIED BY BASELINE GRADE ACCORDING TO GPS SATELLITE COMBINATION

Prof. Jongchool LEE and Hosik JANG, Korea

Key words: Positioning Error, Least Square Method, Relative Positioning, GPS Satellite Combination, Least Observation Time.


Abstract

In the 20th century, there was a remarkable progress in survey instrument and technology powered by the development of scientific technologies. Precision positioning is now possible thanks to GPS (Global Positioning System), three dimensional positioning method using satellites. GPS receiver installed in the observation point and at least four satellites determine the three dimensional coordinates, therefore, disposition and number of the satellites and the baseline may affect the accuracy, and observational error often occurs.

This research is to see how earth surface position error changes according to the number and combination of observation satellites through relative location observation method. Least square method is used for position error analysis. It is to analyze what is the minimum observation time when limiting the position error.


CONTACT

Prof. Jongchool Lee
Dept. of Civil Engineering
Pukyong National University
100 Yongdang Dong
Nam-Gu
Pusan
KOREA
Tel. + 82 51 622 1662
E-mail: jclee@pknu.ac.kr 

Hosik Jang
Ph.D. Course
Dept. of Civil Engineering
Pukyong National University
100 Yongdang Dong
Nam-Gu
Pusan
KOREA
Tel. + 82 51 622 1662
E-mail: gpsjhs@mail1.pknu.ac.kr 

23 March 2001


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