Journal ArticleDOI
Benefits of Using a Tactical-Grade IMU for High-Accuracy Positioning
TLDR
The position and velocity accuracy of the integrated system during complete and partial GPS data outages is investigated and the benefit of using inertial data to improve the ambiguity resolution process after such dataOutages is addressed.Abstract:
Integration of GPS with inertial sensors can provide many benefits for navigation, from improved accuracy to increased reliability. The extent of such benefits, however, is typically a function of the quality of the inertial system used. Traditionally, high-cost, navigation-grade inertial measurement units (IMUs) have been used to obtain the highest position and velocity accuracies. However, the work documented in this paper uses a Honeywell HG-1700 IMU (1 deg/h) to assess the benefits of a tactical-grade IMU in aiding GPS for high-accuracy (centimeter-level) applications. To this end, the position and velocity accuracy of the integrated system during complete and partial GPS data outages is investigated. The benefit of using inertial data to improve the ambiguity resolution process after such data outages is also addressed in detail. Centralized and decentralized filtering strategies are compared in terms of system performance.read more
Citations
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Comparison of Vector-Based Software Receiver Implementations With Application to Ultra-Tight GPS/INS Integration
TL;DR: In this paper, three different Kalman filter implementation options were investigated to estimate signal tracking errors in a GPS receiver with particular emphasis given to the carrier phase. But only two of the three options are able to track incoming signals in vector-tracking mode.
Journal ArticleDOI
Consideration of time-correlated errors in a Kalman filter applicable to GNSS
TL;DR: Results from a field test of the algorithm applied to the problem of kinematic differential GPS demonstrate that the algorithm provides slightly pessimistic covariance Estimates whereas the standard Kalman filter provides optimistic covariance estimates.
Journal ArticleDOI
Tightly coupled integration of GPS precise point positioning and MEMS-based inertial systems
TL;DR: A new integrated navigation system, which integrates GPS precise point positioning (PPP) with low-cost micro-electro-mechanical sensors (MEMS) inertial system, for precise positioning applications and it is shown that decimeter-level positioning accuracy is achievable with both undifferenced and BSSD integrated systems.
Journal ArticleDOI
Performance Analysis on Carrier Phase-Based Tightly-Coupled GPS/BDS/INS Integration in GNSS Degraded and Denied Environments
TL;DR: The results show the TC GPS/BDS/INS system significantly improves the single-epoch AR reliability as compared to that of GPS/bDS-only or single satellite navigation system integrated strategy, especially for high cut-off elevations, and the AR performance is significantly improved for the combined system with adaptive covariance matrix.
DissertationDOI
Tightly coupled MEMS INS/GPS integration with INS aided receiver tracking loops
TL;DR: It is suggested that within the context of a youth-services agency using a mobile application, using a tablet or computer to provide real-time information about an individual’s medical history is a viable process.
References
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Book
Inertial navigation systems with geodetic applications
TL;DR: In this article, the global positioning system (GPS) geodetic application is considered and an initialization and alignment of the GPS system is described in terms of the inertial measurement unit (IMU).
Book ChapterDOI
Instantaneous Ambiguity Resolution
TL;DR: With high quality dual-frequency receivers, it is possible to instantaneously resolve the whole-cycle carrier phase ambiguities in a kinematic scenario.
Journal ArticleDOI
Miniature Interferometer Terminals for Earth Surveying: Ambiguity And Multipath with Global Positioning System
TL;DR: In this paper, the authors proposed a method of ambiguity resolution for short-baseline interferometric observations of GPS, which is suitable for observations made with antennas of low directive gain.
DissertationDOI
Real-time integration of a tactical-grade IMU and GPS for high-accuracy positioning and navigation
TL;DR: In this article, the authors investigated the integration of GPS with a tactical-grade Inertial Measurement Unit (IMU) for centimetre-level navigation in real-time.
Miniature Interferometer Terminals forEarth Surveying: Ambiguity andMultipath with Global Positioning System
TL;DR: For short-baseline interferometric observations of GPS this method yields correct ambiguity resolution despite severe multipath interference and significant sky blockage, even when instability of the frequency standards governing the separate receiving terminals limits the time span of coherent integration to five minutes.