[논문]eLoran Signal Standard Inspection Process Development

Son, Pyo-Woong; Seo, Kiyeol; Fang, Tae Hyun

doi:10.11003/jpnt.2021.10.2.153

eLoran Signal Standard Inspection Process Development 원문보기

Journal of Positioning, Navigation, and Timing, v.10 no.2, 2021년, pp.153 - 158

Son, Pyo-Woong (Maritime Safety and Environmental Research Department, Korea Research Institute of Ships & Ocean Engineering) , Seo, Kiyeol (Maritime Safety and Environmental Research Department, Korea Research Institute of Ships & Ocean Engineering) , Fang, Tae Hyun (Maritime Safety and Environmental Research Department, Korea Research Institute of Ships & Ocean Engineering)

Abstract ▼ AI-Helper

In order to mitigate the vulnerability of the satellite navigation system against radio frequency interference, South Korea has been developing advanced terrestrial navigation system (eLoran) technology since 2016. The eLoran system synchronizes the transmission time of the pulse used in the existing Loran-C system with UTC and transmits correction information that can improve the position error. The eLoran system is known to reduce the position error of about 460 m of the existing Loran-C system to 20 m, and for this, the transmitter must be able to transmit eLoran signals according to more stringent standards. For this reason, an international standard that further developed the Loran-C signal standard established by US Coast Guard was established by Society of Automotive Engineers (SAE) International. In this paper, based on the analysis of the SAE9990 document, the international standard for eLoran transmission signals, a standard inspection process was produced to check whether the eLoran transmitter is transmitting signals in accordance with the standard.

주제어

표/그림 (6)

그림 Fig. 1. eLoran pulse visualization.
그림 Fig. 2. eLoran pulse transmission process.
표 Table 1. eLoran pulse group phase codes.
그림 Fig. 3. eLoran transmitter interface diagram.
그림 Fig. 4. Equipment construction for eLoran signal inspection.
표 Table 2. Zero crossing times and tolerances.

AI 본문요약
AI-Helper

제안 방법

본 논문에서는 eLoran 신호에 관한 표준을 참조하여 eLoran 신호 규격을 검사하기 위한 항목을 설정하였다. 추가적으로 규격 검사를 수행하기 위한 제반 환경 준비에 대해서도 함께 수립하였다.

참고문헌 (11)

Goo, J.-H., Kang, G.-W., An, Y.-E., Han, S.-J., & Park, J.-A. 2007, LORAN-C using and position error improvement against being unable to use the Global Positioning System (GPS), J. Adv. Navig. Technol., 11, 1-8.
ITU 2001, Technical characteristics of methods of data transmission and interference protection for radionavigation services in the frequency bands between 70 and 130 kHz, ITU-R M.589-3
Lo, S., Leathem, M., Offermans, G., Gunther, G. T., Peterson, B., et al. 2009, Defining primary, secondary, additional secondary factors for RTCM minimum performance specifications, Proc. Annu. Tech. Symp. Int. Loran Assoc., Portland, ME. https://web.stanford.edu/group/scpnt/gpslab/pubs/papers/Lo_ILA_2009_RTCM.pdf
Lo, S., Peterson, B., Enge, P., & Swaszek, P. 2007, Loran data modulation: extensions and examples, IEEE Transactions on Aerospace and Electronic Systems, 43, 628-644. http://doi.org/10.1109/TAES.2007.4285358

상세보기
Park, S. G. & Son, P.-W. 2019, Design for back-up of ship's navigation system using UAV in radio frequency interference environment, J. Adv. Navig. Technol. 23, 289-295. https://doi.org/10.12673/jant.2019.23.4.289

원문보기 상세보기
Rhee, J. H. & Seo, J. 2013, eLoran signal strength and atmospheric noise simulation over Korea, J.Korean GNSS Society, 2, 101-108. https://doi.org/10.11003/JKGS.2012.1.1.007

원문보기 상세보기
SAE International 2018, Transmitted Enhanced Loran (eLoran) Signal Standard, SAE9990
Son, P.-W., Park, S. G., Han, Y., & Seo, K. 2020, eLoran:Resilient Positioning, Navigation, and Timing Infrastructure in Maritime Areas, IEEE Access, 8, 193708. http://doi.org/10.1109/ACCESS.2020.3033215

상세보기
Son, P.-W., Rhee, J. H., & Seo, J. 2018, Novel multichain-based loran positioning algorithm for resilient navigation, IEEE Transactions on Aerospace and Electronic Systems, 54, 666-679. https://doi.org/10.1109/TAES.2017.2762438

상세보기
Swaszek, P. F., Johnson, G., Shalaev , R., & Hartnett, R. 2008, Loran phase codes, revisited, 2008 IEEE/ION Position, Location and Navigation Symposium, Monterey, CA, USA, 800-809, doi: 10.1109/PLANS.2008.4570107.
USCG. 1994, Specification of the Transmitted Loran-C Signal, COMDTINST M16562.4A

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