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GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
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A Cycle Slip Detection Framework for Reliable Single Frequency RTK Positioning.

Salma Zainab Farooq1,2, Dongkai Yang1, Echoda Ngbede Joshua Ada1

  • 1School of Electronic and Information Engineering, Beihang University (BUAA), Beijing 100191, China.

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|January 16, 2020
PubMed
Summary

This study introduces a new framework for detecting carrier-phase cycle slips (CS) in single-frequency real-time kinematic (RTK) positioning. The method enhances positioning reliability for mass-market Global Navigation Satellite System (GNSS) applications.

Keywords:
RTKcycle slip detectionleast squares adjustmentminimal detectable biasreliability

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Area of Science:

  • Geomatics Engineering
  • Satellite Navigation Systems
  • Signal Processing

Background:

  • Single-frequency real-time kinematic (RTK) positioning is crucial for mass-market Global Navigation Satellite System (GNSS) applications.
  • Carrier-phase cycle slips (CS) are a primary source of measurement errors in RTK, compromising positioning reliability.
  • Existing CS detection methods require enhancement to ensure robust RTK performance.

Purpose of the Study:

  • To propose a novel framework for detecting carrier-phase cycle slips (CS) to improve the reliability of single-frequency RTK positioning.
  • To integrate CS detection and identification within a least squares (LS) adjustment process for seamless error management.
  • To provide a generic procedure applicable to various GNSS receivers and scenarios involving CS detection.

Main Methods:

  • Utilizes double differenced measurements from single-frequency GNSS receivers.
  • Employs a least squares (LS) adjustment process incorporating a detection, identification, and adaptation (DIA) approach for CS.
  • Analyzes internal and external reliability using Minimal Detectable Bias (MDB) and marginally detectable errors on kinematic data.

Main Results:

  • The proposed framework successfully detects and manages carrier-phase cycle slips (CS) in single-frequency RTK positioning.
  • Theoretical and actual Minimal Detectable Bias (MDB) values were determined, with actual MDB found to be four cycles.
  • The study demonstrates the linkage between CS detection and identification stages for enhanced positioning reliability.

Conclusions:

  • The developed CS detection framework significantly improves the reliability of single-frequency RTK positioning.
  • The proposed procedure is adaptable and can be applied in any situation where CS are detected during LS adjustment.
  • This research contributes to the advancement of robust GNSS mass-market applications through reliable positioning.