A-PPP: Array-Aided Precise Point Positioning With Global Navigation Satellite Systems
TLDR
The global navigation satellite system (GNSS) precise point positioning (PPP) concept is generalized to array-aided PPP (A-PPP), a measurement concept that uses GNSS data from multiple antennas in an array of known geometry to realize improved GNSS parameter estimation.Abstract:
In this paper, the global navigation satellite system (GNSS) precise point positioning (PPP) concept is generalized to array-aided PPP (A-PPP). A-PPP is a measurement concept that uses GNSS data, from multiple antennas in an array of known geometry, to realize improved GNSS parameter estimation (position, attitude, time and atmospheric delays). The concept is formulated such that it applies to each current and future multifrequency GNSS, stand-alone or in combination. A-PPP is made possible through solving a novel orthonormality-constrained multivariate (mixed) integer least-squares problem. It is shown that the integer matrix constraint is necessary to obtain a precise instantaneous attitude- and position solution, whereas the inclusion of the orthonormality constraint in the integer ambiguity objective function is essential to achieve high instantaneous probabilities of correct integer estimation. Different A-PPP applications are discussed, with their performances illustrated by means of empirical GPS results.read more
Citations
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Review and principles of PPP-RTK methods
TL;DR: It is shown that PPP-RTK is a relative technique for which the ‘single-receiver user’ integer ambiguities are in fact double-differenced ambiguITIES, and the transformational links between the different methods and their PPP -RTK corrections are determined, thereby showing how different PPP –RTK methods can be mixed between network and users.
Journal ArticleDOI
Robust GNSS Receivers by Array Signal Processing: Theory and Implementation
TL;DR: An overview of the possible receiver architectures encompassing antenna arrays and the associated signal processing techniques is provided, with emphasis on the most typical implementation issues found when dealing with such technology.
Journal ArticleDOI
Three methods to retrieve slant total electron content measurements from ground-based GPS receivers and performance assessment
TL;DR: A comparative study of the formal precision and the empirical accuracy of the TECM that are retrieved, respectively, by three methods from the same set of GPS data is performed.
Journal ArticleDOI
Instantaneous GPS–Galileo Attitude Determination: Single-Frequency Performance in Satellite-Deprived Environments
TL;DR: The multivariate-constrained least squares ambiguity decorrelation adjustment (MC-LAMBDA) method has been developed to resolve the integer ambiguities of the nonlinearly constrained GNSS attitude model that incorporates the known antenna geometry and is used to analyze the attitude determination performance of a combined GPS +Galileo system.
Journal ArticleDOI
Precise GNSS single epoch positioning with multiple receiver configuration for medium-length baselines: methodology and performance analysis
TL;DR: In this article, the authors developed a method for taking advantage of the abovementioned constraints in order to improve the ambiguity resolution and consequently the performance of the precise GNSS positioning, which showed clear improvement in ambiguity resolution domain in comparison to the commonly used ionosphere-weighted troposphere-estimated geometry based model.
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