[KSCI] Korea Science Citation Index Service

Propagation Delay Modeling and Implementation of DGPS beacon signal over the Spherical Earth

Yu, Dong-Hui (Department of Multimedia Engineering, Catholic University of Pusan)
Weon, Sung-Hyun (Catholic University of Pusan)

Publication Information

Journal of information and communication convergence engineering / v.5, no.4, 2007 , pp. 295-299 More about this Journal

Abstract

This paper presents the ASF(Additional Secondary Factor) modeling of DGPS beacon signal. In addition to DGPS's original purpose, the feasibility to utilize DGPS system for timing and navigation has been studied. For timing and navigation, the positioning system must know the accurate time delay of signal traveling from the transmitter to receiver. Then the delay can be used to compute the user position. The DGPS beacon signal transmits the data using medium frequency, which travels through the surface and cause the additional delay rather than the speed of light according to conductivities and elevations of the irregular terrain. We introduce the modeling of additional delay(ASF) and present the results of implementation. The similar approach is Locan-C. Loran-C has been widely used as the maritime location system and was enhanced to E-Loran(Enhanced Loran). E-Loran system uses the ASF estimation method and is able to provide the more precise location service. However there was rarely research on this area in Korea. Hence, we introduce the ASF and its estimation model. With the comparison of the same condition and data from the original Monteath model and ASF estimation data of Loran system respectively, we guarantee that the implementation is absolutely perfect. For further works, we're going to apply the ASF estimation model to Korean DGPS beacon system with the Korean terrain data.

Keywords

ASF; Propagation delay modeling; Location; DGPS; Loran;

Citations & Related Records

Reference

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