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Study on the time-delay compensation of RTK correction message for improvement of continuous position surveying performance under unexpected temporal datalink loss/cut-off  

Park, Byung-Woon (Korea Cadastral Survey Corp., Cadastral Research Institute)
Song, June-Sol (Mechanical & Aerospace Engineering, Seoul National University)
Kee, Chang-Don (Mechanical & Aerospace Engineering, Seoul National University)
Yang, Chul-Soo (Korea Cadastral Survey Corp., Cadastral Research Institute)
Tcha, Dek-Kie (Korea Cadastral Survey Corp., Cadastral Research Institute)
Abstract
In this paper, robustness performance of SNUR message is compared with those of existing ones, RTCM(Radio Technical Commission for Maritime Services) v2 MT(Message Type) 18/19 and MT 20/21 under a poor broadcast condition such as temporary data loss or disconnection We defined the temp oral data loss as 2 second delay and reconnection after disconnection as 7 second latency, and then evaluated its robustness for each latency case by double differentiating the observables. Our result shows that SNUR protocol method can reduce the latency error of the existing RTCM messages by 30~60%. Moreover, a rover using SNUR message, whose latency error is bounded within 1/4 L1 wave length, can figure out its own fixed position continuously in spite of 7 second disconnection, while the other using RTCM message, whose error is larger than half wave length, cannot keep its previous fixed solution.
Keywords
Compact RTK; SNUR; RTCM; Navigation Satellite; RTK; correction message; Data Link; Disconnection; delay;
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Times Cited By KSCI : 1  (Citation Analysis)
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