Ntrip 기반 보정서비스를 활용한 저가 GPS 수신기의 실시간 측위 정확도 평가

다국어 초록 (Multilingual Abstract)

This paper presents the static and kinematic positioning accuracy by the real-time GPS positioning modes of the low-cost GPS receivers using NTRIP-based augmentation service. For this, acquires both the raw measurements data of the field tests by LEA 6T GPS module of u-blox AG, and correction communication via NTRIP caster with RTKLIB as an open source program for GNSS solution. With computing the positions of the check points and road tracks by six kinds of GPS positioning modes which are Single, SBAS, DGPS, PPP, RTK, and TCP/IP_RTK, compared these results to the reference position of the check points. The position error average and rmse of the static test by GPS L1 RTK surveying showed N=0.002m±0.001m, E=0.004m±0.001m in horizontal plane, and h=-0.116m±0.003m in vertical, these results are very closed to the coordinates with the geodetic receiver. Especially, in case of the kinematic test with obstacles located on both sides of road, the computed track with ambiguity fixing showed very similar trajectory considerably from VRS network RTK mode. And also, evaluate and verify the performance of the TCP/IP_RTK mode developed based on TCP/IP protocol.

참고문헌 (Reference)

1 u-blox AG, "U-center version 8"

2 Teunissen, P. J. G., "The least-square ambiguity decorrelation adjustment : a method for fast GPS ambiguity estimation" 70 : 65-82, 1995

3 Takasu, T., "RTKLIB : an open source program package for GNSS positioning"

4 RTCM, "RTCM 10410.1 standard for networked transport of RTCM via internet protocol version 2.0 with amendment"

5 RTCM, "RTCM 10402.3 recommended standards for differential GNSS service, version 2.3 with amendment"

6 National Coordination Office for Space-Based Positioning, "Navigation, and Timing, 2015" GPS accuracy

7 장수익, "NTRIP 서비스를 이용한 도로절토사면 현황조사방법" 한국지형공간정보학회 18 (18): 87-92, 2010

8 Chang, X. W., "MLAMBDA : a modified LAMBDA method for integer least squares estimation" 79 : 552-565, 2005

9 u-blox AG, "LEA‐6T module with Precision Timing"

10 IGS, "IGS Real-time Service, 2015"

11 National Geographic Information Institute, "GNSS data service"

12 Takasu, T., "Development of the low-cost RTK-GPS receiver with an open source program package RTKLIB" 4-6, 2009

13 The National Maritime PNT Office, "DGNSS service"

14 BKG, "BKG Ntrip Client, Ntrip-Networked transport of RTCM via internet protocol"

15 BKG, "BKG GNSS Surfer"