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Comparison of Positioning Accuracy Using the Pseudorange from Android GPS Raw Measurements

안드로이드 GPS 원시데이터의 의사거리를 이용한 측위 정확도 비교

  • 김준성 (주식회사 피피솔 기술연구소) ;
  • 박관동 (인하대학교 지리정보공학과)
  • Received : 2017.09.22
  • Accepted : 2017.10.12
  • Published : 2017.10.31

Abstract

In this paper, the pseudorange-based GPS performance using the Android's raw measurements is compared with NMEA. In order to compare the performance between the two different implementations, we used Nexus 9 tablets and collected the raw measurements and NMEA data using the GNSS logger application provided by Google. To verify the performance of the final coordinates calculated, the VRS was used as the reference coordinate and compared with the NMEA results. The resulting horizontal, vertical, and 3D RMS errors of the pseudorange-based GPS using the Android's raw measurements are 3.05, 3.82, and 4.97 m, respectively, which correspond to 32% horizontal, 65% vertical and 49% 3D performance improvement compared with NMEA.

이 연구에서는 안드로이드의 GPS 원시데이터를 이용한 의사거리 기반 GPS 성능을 자체 계산된 NMEA와 비교했다. 원시데이터를 이용한 GPS와 NMEA간의 성능 비교를 위해 Nexus 9 태블릿을 사용하고, 구글에서 제공하는 GNSS logger 어플리케이션을 이용하여 원시데이터와 NMEA를 수집하였다. 산출된 최종좌표의 성능을 검증하기 위해 VRS를 기준 좌표로 사용하고, 동시간 NMEA 결과와 비교하였다. 원시데이터의 의사거리를 이용한 GPS의 정확도는 수평 RMS 3.05 m, 수직 RMS 3.82 m, 3차원 RMS 4.97 m로 NMEA 대비 수평 32 %, 수직 65 %, 3차원 49 %의 성능 향상을 확인할 수 있었다.

Keywords

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