WAD-RNSS 무결성 경고 개념 연구

• Published in: Journal of Positioning, Navigation, and Timing Vol. 14; no. 1; pp. 47 - 52
• Main Authors: 김윤중, 김인종, 김동욱, Yunjung Kim, In Jong Kim, Donguk Kim
• Format: Journal Article
• Language: Korean
• Published: 사단법인 항법시스템학회 01.03.2025
• Subjects: 기타공학
• ISSN: 2288-8187; 2289-0866
• DOI: 10.11003/JPNT.2025.14.1.47

The Wide-Area Differential Regional Navigation Satellite System (WAD-RNSS) is a satellite navigation system that applies a wide-area differential navigation algorithm, previously utilized in Global Navigation Satellite Systems (GNSS), to Regional Navigation Satellite Systems (RNSS). WAD-RNSS broadcasts both navigation signals and correction signals directly from regional navigation satellites and provides integrity alerts to users in the event of integrity threats by utilizing these signals. One of the most critical metrics for evaluating navigation performance, integrity refers to the system's capability to preemptively warn users of system malfunctions or significant errors in position estimation. By transmitting navigation messages, correction messages, and Non-Standard Code (NSC) signals, WAD-RNSS ensures robust integrity through the dissemination of integrity alerts. This paper analyzes the limitations of integrity alert mechanisms in conventional satellite navigation systems and introduces the integrity alert methods and operational concepts of WAD-RNSS, which combines the characteristics of Global Positioning System (GPS) and Satellite-Based Augmentation Systems (SBAS). The proposed system highlights the potential to reduce the system response and recovery time following integrity alerts compared to existing satellite navigation systems.