한국형 위성항법시스템을 위한 위성군집궤도 최적 설계

• 영문명: Optimal Satellite Constellation Design for Korean Navigation Satellite System
• 발행기관: 한국산업경영시스템학회
• 저자명: 김한별(Han Byeol Kim) 김흥섭(Heung Seob Kim)
• 간행물 정보: 『산업경영시스템학회지』제39권 제3호, 1~9쪽, 전체 9쪽
• 주제분류: 경제경영 > 경영학
• 파일형태: PDF
• 발행일자: 2016.09.30

영문 초록

NSS (Navigation satellite system) provides the information for determining the position, velocity and time of users in real time using satellite-networking, and is classified into GNSS (Global NSS) and RNSS (Regional NSS). Although GNSS services for global users, the exactitude of provided information is dissatisfied with the degree required in modern systems such as unmanned system, autonomous navigation system for aircraft, ship and others, air-traffic control system. Especially, due to concern about the monopoly status of the countries operating it, some other countries have already considered establishing RNSS. The RNSS services for users within a specific area, however, it not only gives more precise information than those from GNSS, but also can be operated independently from the NSS of other countries. Thus, for Korean RNSS, this paper suggests the methodology to design the satellite constellation considering the regional features of Korean Peninsula. It intends to determine the orbits and the arrangement of navigation satellites for minimizing PDOP (Position dilution of precision). PGA (Parallel Genetic Algorithm) geared to solve this nonlinear optimization problem is proposed and STK (System tool kit) software is used for simulating their space flight. The PGA is composed of several GAs and iterates the process that they search the solution for a problem during the pre-specified generations, and then mutually exchange the superior solutions investigated by each GA. Numerical experiments were performed with increasing from four to seven satellites for Korean RNSS. When the RNSS was established by seven satellites, the time ratio that PDOP was measured to less than 5 (i.e. better than ‘Good’ level on the meaning of the PDOP value) was found to 94.3% and PDOP was always kept at 10 or less (i.e. better than ‘Moderate’ level).

목차

1. 서 론

2. 배경이론

3. 위성군집궤도 최적화 방법

4. 수치실험

5. 결 론

키워드

Navigation Satellite System Satellite Constellation Parallel Genetic Algorithm Dilution of Precision Triangulation