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Article
Open AccessRegional ionospheric correction generation for GNSS PPP-RTK: theoretical analyses and a new interpolation method
The regional ionospheric corrections have become one of the critical parts of Precise Point Positioning (PPP)-based Real-Time-Kinematic (RTK) services to achieve fast positioning convergence. Several methods f...
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Article
Extension of the undifferenced and uncombined CDMA PPP-RTK for not-common-frequency GNSS observations
Integer ambiguity resolution enabled precise point positioning, PPP-RTK, which is becoming one of the most popular global navigation satellite system (GNSS) positioning modes. Owing to the presence of rank def...
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Article
Estimating process noise variance of PPP-RTK corrections: a means for sensing the ionospheric time-variability
The provision of accurate ionospheric corrections in PPP-RTK enormously improves the performance of single-receiver user integer ambiguity resolution (IAR), thus enabling fast high precision positioning. While...
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Article
Open AccessOn the role of lidar measurements in speeding up precise point positioning convergence
Global navigation satellite system (GNSS) and light detection and ranging (lidar) are well known to be complementary for vehicle positioning in urban canyons, where GNSS observations are prone to signal blocka...
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Article
Impact and mitigation of neglecting PPP-RTK correctional uncertainty
The corrections needed to realize integer ambiguity resolution-enabled precise point positioning (PPP-RTK) at a single-receiver user are often treated as if they are deterministic quantities. The present contribu...
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Article
Open AccessGLONASS–only FDMA+CDMA RTK: Performance and outlook
An assessment of standalone GLONASS RTK performance is provided using its FDMA and CDMA signals. The new integer-estimable GLONASS FDMA model (Teunissen 2019), which guarantees the integer-estimability of its ...
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Article
On the detectability of mis-modeled biases in the network-derived positioning corrections and their user impact
High-precision single-receiver positioning requires the provision of reliable network-derived corrections. Care must therefore be exercised to continuously check the quality of the corrections and to detect th...
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Article
Open AccessFive-frequency Galileo long-baseline ambiguity resolution with multipath mitigation
For long-baseline over several hundreds of kilometers, the ionospheric delays that cannot be fully removed by differencing observations between receivers hampers rapid ambiguity resolution. Compared with formi...
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Article
S-system theory applied to array-based GNSS ionospheric sensing
The GPS carrier-phase and code data have proven to be valuable sources of measuring the Earth’s ionospheric total electron content (TEC). With the development of new GNSSs with multi frequency data, many more ...
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Article
Assessing the IRNSS L5-signal in combination with GPS, Galileo, and QZSS L5/E5a-signals for positioning and navigation
The Indian Regional Navigation Satellite System (IRNSS), which is being developed for positioning services in and around India, is the latest addition to the global family of satellite-based navigation system...
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Living Reference Work Entry In depth
Multi-GNSS Positioning
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Article
On the estimability of parameters in undifferenced, uncombined GNSS network and PPP-RTK user models by means of \(\mathcal {S}\) -system theory
The concept of integer ambiguity resolution-enabled Precise Point Positioning (PPP-RTK) relies on appropriate network information for the parameters that are common between the single-receiver user that applie...
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Article
A recursive linear MMSE filter for dynamic systems with unknown state vector means
In this contribution we extend Kalman-filter theory by introducing a new recursive linear minimum mean squared error (MMSE) filter for dynamic systems with unknown state-vector means. The recursive filter enab...
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Chapter and Conference Paper
Single-Frequency PPP-RTK: Theory and Experimental Results
Integer ambiguity resolution enabled Precise (cm-level) Point Positioning (PPP) is feasible if corrections from a GPS network of CORS stations are applied to the single-receiver phase and code data of a user. ...
