A GPS Receiver for High-Altitude Satellite Navigation

Winternitz, Luke; Bamford, William; Heckler, Gregory W.

doi:10.1109/jstsp.2009.2023352

Cited by 57 publications

(40 citation statements)

References 7 publications

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“…According to O' Driscoll [5] and Winternitz [11], n w (nT s ) can be described using a complex normal distribution, composed of a real and an imaginary part, which are jointly normal and independent.…”

Section: Baseband Signal Modelmentioning

confidence: 99%

“…Substituting τ = JTs in (9) (which is the product of expressions (10) and (11)) and evaluating the part of the equation in which complex exponentials are multiplied, we have…”

Section: Receiver Working Principle and General Aspectsmentioning

confidence: 99%

“…In other studies dealing with LEO GNSS receivers, for example, Winternitz, Bamford, and Heckler [11], a standard noncoherent acquisition method is successfully used to tackle the problem. In Calmettes, Dion, Boutillion et al [1], a computationally efficient method based on Akopian [9] is applied in the case of GPS and GALILEO signals.…”

Section: Introductionmentioning

confidence: 99%

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A Proof of Concept Study for a Fast Acquisition in a LEO Satellite GPS Receiver

2018

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The aim of this work is to perform a proof of concept study in order to assess if the pre-correlation differential detector can be used to tackle the GPS signal acquisition in a high dynamics scenario problem. The high dynamics scenario to be studied is the case in which a GPS receiver is used in a LEO (Low Earth Orbit) satellite mission. The receiver's appropriateness for the case study is demonstrated via computational cost study and detector statistical characterization. GPS L1 C/A legacy signals for the context are simulated using a Spirent GSS7700 signal generator. The signals are sampled using a USRPX310 as an RF front-end. Using these samples, the receivers are implemented in Matlab using an SDR (Software Defined Radio) experimental setup. A specially designed figure of merit is used to measure the performance of the pre-correlation differential receiver in the realistic LEO satellite case study.

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Section: Baseband Signal Modelmentioning

confidence: 99%

“…Substituting τ = JTs in (9) (which is the product of expressions (10) and (11)) and evaluating the part of the equation in which complex exponentials are multiplied, we have…”

Section: Receiver Working Principle and General Aspectsmentioning

confidence: 99%

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A Proof of Concept Study for a Fast Acquisition in a LEO Satellite GPS Receiver

2018

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“…In addition to the variation in the C/N 0 estimate, there may also exist a mean error in the estimator output. While there is no way to determine if such an error exists by analysis of the GPS ACE data, there is a detailed discussion of the estimator performance in [32] which describes both the mean and standard deviation of the Navigator C/N 0 estimator as a function of C/N 0 . As shown in [30] the error in the mean grows from approximately 0.25 dB at a C/N 0 of 30 dB-Hz to 1.2 dB at 10 dB-Hz.…”

Section: Uncertainty In Carrier To Noise Densitymentioning

confidence: 99%

Characterization of On-Orbit GPS Transmit Antenna Patterns for Space Users

Donaldson

Parker

Moreau

et al. 2018

Proceedings of the 31st International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS+ 201

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The GPS Antenna Characterization Experiment (GPS ACE) has made extensive observations of GPS L1 signals received at geosynchronous (GEO) altitude, with the objective of developing comprehensive models of the signal levels and signal performance in the GPS transmit antenna side lobes. The experiment was originally motivated by the fact that data on the characteristics and performance of the GPS signals available in GEO and other high Earth orbits was limited. The lack of knowledge of the power and accuracy of the side lobe signals on-orbit added risk to missions seeking to employ the side lobes to meet navigation requirements or improve performance. The GPS ACE Project filled that knowledge gap through a collaboration between The Aerospace Corporation and NASA Goddard Spaceflight Center to collect and analyze observations from GPS side lobe transmissions to a satellite at GEO using a highly-sensitive GPS receiver installed at the ground station. The GPS ACE architecture has been in place collecting observations of the GPS constellation with extreme sensitivity for several years. This sensitivity combined with around-the-clock, all-in-view processing enabled full azimuthal coverage of the GPS transmit gain patterns over time to angles beyond 90 degrees off-boresight. Results discussed in this paper include the reconstructed transmit gain patterns, with comparisons to available pre-flight gain measurements from the GPS vehicle contractors. For GPS blocks with extensive ground measurements, the GPS ACE results show remarkable agreement with ground based measurements. For blocks without extensive ground measurements, the GPS ACE results provide the only existing assessments of the full transmit gain patterns. The paper also includes results of pseudorange deviation analysis to assess systematic errors associated with GPS side lobe signals.https://ntrs.nasa.gov/search.

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“…GPS has been used in formation control by [7] for controlling autonomous vehicles using GPS equipped surface craft, and by [8] for navigation in low orbits that will be used in NASA's upcoming Magnetospheric Multiscale Mission. Another use is that of the intended application of this research: control of unmanned aerial vehicles for the Defence Science & Technology Organisation (DSTO) of Australia.…”

Section: Introductionmentioning

confidence: 99%

Controlling the shape and scale of triangular formations using landmarks and bearing-only sensing

Manuel

Bishop

Anderson

et al. 2016

2016 35th Chinese Control Conference (CCC)

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Abstract-This work considers the scenario where three agents that can sense only bearings use two landmarks to control their formation shape. We define a method of relating the known distance separating the landmarks back to the edge lengths of the triangular formation. The result is used to define a formation control law that incorporates inter-agent distance constraints. We prove a strong exponential convergence result and show how one can extend the controller such that global stability from any initial position is possible.

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A GPS Receiver for High-Altitude Satellite Navigation

Cited by 57 publications

References 7 publications

A Proof of Concept Study for a Fast Acquisition in a LEO Satellite GPS Receiver

A Proof of Concept Study for a Fast Acquisition in a LEO Satellite GPS Receiver

Characterization of On-Orbit GPS Transmit Antenna Patterns for Space Users

Controlling the shape and scale of triangular formations using landmarks and bearing-only sensing

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