• Title/Summary/Keyword: GNSS application

Search Result 96, Processing Time 0.029 seconds

A Visibility Analysis of GNSS for the Railway Application (위성항법기술의 철도적용을 위한 가시성 분석 연구)

  • Shin, Kyung-Ho;Lee, Jun-Ho;Kim, Young-Gyu
    • Proceedings of the KIEE Conference
    • /
    • 2008.04c
    • /
    • pp.190-192
    • /
    • 2008
  • GNSS(Global navigation Satellite system) is the system which determines the users' position using the navigation satellites. The position determination using GNSS has to be always Possible to appling GNSS to railway system widely. Especially, to apply GNSS to the safety-critical application, such as train control system, the satellite's visibility has to be always secured. This study describes the necessity of visibility analysis and the method. And also the visibility analysis of the stand-alone GNSS and the integration GNSS are performed and the applicability of GNSS for train control application is analysed.

  • PDF

Study on Technical Standard of Aviation GNSS for SBAS Performance Based Navigation (SBAS 성능기반 항행을 위한 항공용 GNSS 기술표준 분석 연구)

  • Park, Jae-ik;Lee, Eunsung;Heo, Moon-beom;Nam, Gi-wook
    • Journal of Advanced Navigation Technology
    • /
    • v.20 no.4
    • /
    • pp.305-313
    • /
    • 2016
  • International Civil Aviation Organization (ICAO) has recommended the adoption of performance-based navigation (PBN), which utilizes global navigation satellite system (GNSS). As a part of efforts to adopt PBN in South Korea, preparations have been made to implement GNSS. In Oct. 2014, Korea augmentation satellite system (KASS) was officially launched for development. A set of navigation devices need to be on-board for an airplane to utilize GNSS. GNSS navigation devices are used for different phases of flights through en-route, terminal, departure, approach and a wide variety of specification standards have been proposed for GNSS navigation. In this paper, we investigate the many proposed standards for GNSS navigation devices and their interfaces. This paper can be useful for designing procedures and flight test used in KASS implementation.

Implementation and Experimental Test Result of a Multi-frequency and Multi-constellation GNSS Software Receiver Using Commercial API

  • Han, Jin-Su;Won, Jong-Hoon
    • Journal of Positioning, Navigation, and Timing
    • /
    • v.8 no.1
    • /
    • pp.1-12
    • /
    • 2019
  • In this paper, we implement a navigation software of a Global Navigation Satellite System (GNSS) receiver based on a commercial purpose GNSS software receiver platform and verify its performance by performing experimental tests for various GNSS signals available in Korea region. The SX3, employed in this paper, is composed of an application program and a Radio Frequency (RF) frontend, and can capture and process multi-constellation and multi-frequency GNSS signals. All the signal processing procedure of SX3 is accessible by the receiver software designer. In particular for an easy research and development, the Application Programing Interface (API) of the SX3 has a flexible architecture to upgrade or change the existing software program, equipped with a real-time monitoring function to monitor all the API executions. Users can easily apply and experiment with the developed algorithms using a form of Dynamic Link Library (DLL) files. Thus, by utilizing this flexible architecture, the cost and effort to develop a GNSS receiver can be greatly reduced.

Extension and Implementation of Iconic Stereotype for GNSS Application in the UML Class Diagram

  • Wang Bo;No, Hye-Min;Yoo, Cheol-Jung;Chang, Ok-Bae
    • Proceedings of the Korean Information Science Society Conference
    • /
    • 2003.04c
    • /
    • pp.136-138
    • /
    • 2003
  • UML cannot meet all the requirements offered in different software system for diverse application domain. GNSS (Global Navigation Satellite System) application domain is an especial environment that requires precise measurement and precision calculation of real-world geographical entities with the help of GPS (Global Position System) in both temporal and spatial factor. Therefore in the paper new extended iconic stereotypes for better modeling GNSS application in the UML Diagram are proposed, and the implementation of a program called StereotypeCreator, which is able to create iconic stereotypes used in one of the most popular visual modeling tools for software development, Rational Rose, will be also proposed.

  • PDF

Circumstance Change of GNSS & Application Strategy of Navigation Technology for Modem Weapon System (GNSS 구축 환경변화와 현대무기체계에의 항법기술 사용전략)

  • Ko, Kwang-Soob
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.14 no.1
    • /
    • pp.267-275
    • /
    • 2010
  • Recently, the implementation & modern policy for Global Navigation Satellite System have actively been performed by USA, RUSSIA, EU & CHINA. Therefore 100+ navigation satellites will be in orbit by 2015, and the user of military and civil will benefit from the use of a total constellation of 100+ satellites. It means that the deepest dependence to GPS would be declined. In the paper, the latest technology development & implementation policy of GNSS have been analyzed. Specially, we focused on circumstance change of GNSS & application of navigation technology for modem weapon system. Finally, the application strategy of the integrated GNSS is suggested for military and civil as well.

Development of Precision Positioning and Fine Displacement Monitoring Based on GNSS (GNSS 기반의 정밀측위 및 미세변위 모니터링 개발)

  • Yeon, Sang-Ho
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.17 no.3
    • /
    • pp.145-152
    • /
    • 2017
  • In this paper, GNSS(global navigation satellite system) to monitoring the fine for the construction of structure displacement based on satellite communications signals of GNSS. At the same time on USN(ubiquitous sensor network) and proposed a new approach to precise positioning by analyzing the results. A major construction structure for the safety diagnosis and prevent disaster from the risk of collapse. Precision measurement methods to mm level GNSS in that case and experiments in the application of new technologies that can most commonly used to replace the current through the permanent. The way a GNSS baseline and tested it on to prove. As a result, at our country at precise positioning and fine displacement monitoring application virtual reference station(VRS) in a GNSS mm of a margin of error of horizontal and vertical directions can be found.

Requirement Analysis and Conceptual Design of GNSS Digitized IF Signal Simulator (위성항법 이산화 IF 신호 시뮬레이터 요구사항분석 및 개념 설계)

  • Lee, Sang-Uk;Ju, In-Won;Lee, Jae-Eun
    • Journal of Satellite, Information and Communications
    • /
    • v.2 no.1
    • /
    • pp.41-47
    • /
    • 2007
  • Software GNSS digitized IF signal simulator is being developed by ETRI as a part of development of software-based GNSS Test & evaluation Facility which will provide test and evaluation environment for various software level application and navigation algorithm in GNSS. Software GNSS IF signal simulator will provide digitized GNSS signal including GPS and Galileo. The requirement analysis and conceptual design for the Software GNSS IF signal simulator is presented in this paper.

  • PDF

Application of GNSS Non-Precision and Precision Approaches to a Circle-to-Land Approach Airport (선회착륙공항에서의 GNSS 비정밀접근 및 정밀접근 적용 연구)

  • Kim, Y.M.;Kang, J.Y.
    • Journal of the Korean Society for Aviation and Aeronautics
    • /
    • v.12 no.3
    • /
    • pp.65-85
    • /
    • 2004
  • Circling to land is a relatively dangerous maneuver. It contains the worst elements of IFR flight. There is a minimum obstruction clearance, a limited space in which to maneuver, an absence of visual reference, and trying to keep the runway in sight while preparing to land. At night it is quite a bit more than dangerous. The required continuous turn in marginal conditions that keeps the airport in sight is hazardous. Therefore, this paper proposes an application of GNSS to circling approach to reduce or remove chances of accidents which may occur under such unfavorable flight conditions. The study reviews relevant documents published by ICAO and FAA and provides scenarios for non-precision and precision approaches and circling approach based on the GNSS for Kimhae airport. Also requirements for the ground facility design are studied and provided.

  • PDF

Study on for Simulation of GNSS Signal Generation (위성항법 신호생성 시뮬레이터 구현을 위한 신호생성 알고리즘 연구)

  • Kim, Tae-Hee;Lee, Jae-Eun;Lee, Sang-Uk;Kim, Jae-Hoon;Hwang, Dong-Hwan
    • Journal of the Korean Society for Aeronautical & Space Sciences
    • /
    • v.37 no.11
    • /
    • pp.1148-1156
    • /
    • 2009
  • ETRI has developed GNSS digitized IF signal generator for providing test and evaluation environment for various software level application and navigation algorithm in Global Navigation Satellite System(GNSS). GNSS digitized IF signal generator provides two main capabilities, GPS and Galileo raw data generation and digitized IF signal generation. GNSS digitized IF signal generator consists of five main modules which are GNSS Satellite Orbit Simulation Module, Navigation Message Generation Module, Error Generation Module, GNSS IF Signal Generation Module, and Message & Signal Steering Module. We verified the signal generated by the GNSS signal generation algorithm using software receiver for generation of signal brother to real GNSS signal.