Evaluation of a Method for Kinematic GPS Carrier-Phase Ambiguity Resolution Using a Network of Reference Receivers PDF Download
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Author: Brian L. Bracy
Publisher:
ISBN: 9781423535768
Category :
Languages : en
Pages : 77
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Book Description
New applications for GPS have driven a demand for increased positioning accuracy. The emerging GPS technology particularly affects the test community. The testing equipment and method must provide a solution that is an order of magnitude more precise than the tested equipment to achieve the desired accuracy. Carrier-phase differential GPS methods using a network of reference receivers can provide the centimeter-level accuracy required over a large geographical area. This thesis evaluates the performance of a 5-receiver network over a 50 km x 120 km area of New Mexico, using a GPS network algorithm called NetAdjust. The percentage of time a fixed integer solution was available for a kinematic baseline was investigated for three types of measurements. Results showed that the virtual reference receiver method using NetAdjust-corrected measurements outperformed the raw and NetAdjust-corrected file results. However, these results were only obtained for the shortest baseline receivers. The receivers with longer baselines did not experience the same degree of success, but did lead to several important insights gained from the research. Most importantly, the accuracy of the reference receiver coordinates is critical to the performance of a reference receiver network. Further testing must be accomplished before a full implementation is recommended.
Author: Brian L. Bracy
Publisher:
ISBN: 9781423535768
Category :
Languages : en
Pages : 77
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Book Description
New applications for GPS have driven a demand for increased positioning accuracy. The emerging GPS technology particularly affects the test community. The testing equipment and method must provide a solution that is an order of magnitude more precise than the tested equipment to achieve the desired accuracy. Carrier-phase differential GPS methods using a network of reference receivers can provide the centimeter-level accuracy required over a large geographical area. This thesis evaluates the performance of a 5-receiver network over a 50 km x 120 km area of New Mexico, using a GPS network algorithm called NetAdjust. The percentage of time a fixed integer solution was available for a kinematic baseline was investigated for three types of measurements. Results showed that the virtual reference receiver method using NetAdjust-corrected measurements outperformed the raw and NetAdjust-corrected file results. However, these results were only obtained for the shortest baseline receivers. The receivers with longer baselines did not experience the same degree of success, but did lead to several important insights gained from the research. Most importantly, the accuracy of the reference receiver coordinates is critical to the performance of a reference receiver network. Further testing must be accomplished before a full implementation is recommended.
Author: Brian Bracy (L.)
Publisher:
ISBN:
Category : Artificial satellites in navigation
Languages : en
Pages : 154
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Book Description
Author: John F. Raquet
Publisher:
ISBN: 9781423554561
Category : Global Positioning System
Languages : en
Pages : 282
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Book Description
To perform the most precise relative positioning using GPS, it is necessary to resolve the carrier-phase integer cycle ambiguities. This process becomes increasingly difficult as the distance between the mobile and reference GPS receivers increases, due to the decorrelation of the GPS errors with distance, resulting in a practical limit on the distance over which ambiguity resolution can be performed when using a single reference receiver. This thesis proposes a novel method, called NetAdjust, which uses multiple reference receivers to reduce code and carrier-phase differential measurement errors and improve the ability to resolve carrier-phase ambiguities. The NetAdjust method is based upon an optimal linear minimum error variance estimator, and it "encapsulates" all of the network information into the measurements of a single reference receiver, so standard single-reference differential GPS processing algorithms can be used. The geometry of the reference receiver network is embedded within the error covariance matrix, and a functional form of this covariance matrix is described. The NetAdjust method was tested using two different GPS networks, an 11-receiver network covering a 400 km x 600 km region in southern Norway, and a 4-receiver network covering a 50 km x 150 km region at Holloman AFB in New Mexico. The results for L1 code, L1 phase, and widelane phase measurements are analyzed in the measurement domain and the position domain, showing improvements in RMS errors of up to 50% when using NetAdjust. Significant improvements in the ability to resolve carrier-phase ambiguities are also demonstrated for the Holloman and Norway test networks. Issues relating to development of an operational, real-time NetAdjust system are discussed. Also, a covariance analysis method is developed which can be used to predict NetAdjust effectiveness under various conditions and network configurations.
Author: John Foster Raquet
Publisher:
ISBN:
Category : Global Positioning System
Languages : en
Pages : 259
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher: Jeffrey Frank Jones
ISBN:
Category :
Languages : en
Pages : 2169
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Book Description
Just a SAMPLE of the CONTENTS: 1. | Full Text pdf - 5 MB Title: Steam Vapor Cleaning Ejection Seat Frames and Components Technical Evaluation AD Number: ADA412405 Corporate Author: NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD Personal Author: Kwan, R. M. Yost, A. J. Santiago, J. V. Herring, A. C. Conlin, M. M. Report Date: March 19, 2003 Media: 86 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 424295 From the collection: Technical 2. | Full Text pdf - 5 MB Title: Using the GPS to Improve Trajectory Position and Velocity Determination During Real-Time Ejection Seat Test and Evaluation AD Number: ADA415240 Corporate Author: AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT Personal Author: Schutte, Christina G. Report Date: February 01, 2003 Media: 127 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE 26 - NOT AVAILABLE IN MICROFICHE Report Classification: (Not Available). Source Code: 439106 From the collection: Technical 3. | Full Text pdf - 4 MB Title: Using the GPS to Collect Trajectory Data for Ejection Seat Design, Validation, and Testing AD Number: ADA401521 Corporate Author: AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT Personal Author: Tredway, Brian R. Report Date: March 01, 2002 Media: 171 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE 26 - NOT AVAILABLE IN MICROFICHE Report Classification: (Not Available). Source Code: 439106 From the collection: Technical 4. | Full Text pdf - 974 KB Title: Biodynamic Modeling and Simulation of the Ejection Seat/Occupant System AD Number: ADA380710 Corporate Author: VERIDIAN ENGINEERING DAYTON OH Personal Author: Ma, Deren Obergefell, Louise Rizer, Annette Rogers, Lawrene Report Date: April 01, 2000 Media: 16 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 437799 From the collection: Technical 5. | Full Text pdf - 647 KB Title: Heat Treatment of Al 7075 for Ejection Seat Shear Wire. AD Number: ADA362873 Corporate Author: NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD SURVIVABILITY STRUCTURES AND MATERIALS DIRECTORATE Personal Author: Wong, Catherine R. Mastroianni, Lee S. Report Date: March 01, 1999 Media: 15 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 426437 From the collection: Technical 6. | Full Text pdf - 965 KB Title: Investigation of Occupant Restraint Improvements to the SIIIS-3 Ejection Seat. AD Number: ADA378913 Corporate Author: AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH Personal Author: Pint, Steven M. Perry, Chris E. Report Date: January 01, 1999 Media: 21 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 434299 From the collection: Technical 7. | Full Text pdf - 595 KB Title: USN/USMC Ejection Seat Equipped Aircraft Anthropometric Accommodation AD Number: ADA377912 Corporate Author: NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD Personal Author: Kennedy, Greg Report Date: January 01, 1999 Media: 14 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 424295 From the collection: Technical 8. | Full Text pdf - 6 MB Title: +GZ Impact Tests of the Large JPATS Manikin in a Simulated Martin-Baker Ejection Seat. AD Number: ADA344944 Corporate Author: ARMSTRONG LAB WRIGHT-PATTERSON AFB OH BIODYNAMICS AND BIOCOMMUNICATIONS DIV Personal Author: Buhrman, John R. Report Date: October 01, 1997 Media: 179 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 423430 From the collection: Technical 9. | Full Text pdf - 19 MB Title: The K-36D Ejection Seat Foreign Comparative Testing (FCT) Program. AD Number: ADA321294 Corporate Author: ARMSTRONG LAB WRIGHT-PATTERSON AFB OH CREW SYSTEMS DIRECTORATE Personal Author: Specker, Lawrence J. Plaga, John A. Report Date: May 01, 1996 Media: 437 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE 23 - AVAILABILITY: DOCUMENT PARTIALLY ILLEGIBLE Report Classification: (Not Available). Source Code: 423429 From the collection: Technical 10. | Full Text pdf - 5 MB Title: Evaluation of a Proposed F-4 Ejection Seat Cushion by +Gz Impact Tests. AD Number: ADA289700 Corporate Author: ARMSTRONG LAB WRIGHT-PATTERSON AFB OH CREW SYSTEMS DIRECTORATE Personal Author: Brinkley, James W. Perry, Chris E. Salerno, Mark D. Orzech, Mary A. Report Date: July 01, 1993 Media: 119 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 423429 From the collection: Technical 11. | Full Text pdf - 3 MB Title: Computational Analysis of High-Speed Ejection Seats AD Number: ADA290328 Corporate Author: NIELSEN ENGINEERING AND RESEARCH INC MOUNTAIN CA Personal Author: Caruso, Steven C. Mendenhall, Michael R. Report Date: April 20, 1991 Media: 86 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 389783 From the collection: Technical 12. | Full Text pdf - 1 MB Title: Development of an Inflatable Head/Neck Restraint System for Ejection Seats (Update) AD Number: ADA067124 Corporate Author: NAVAL AIR DEVELOPMENT CENTER WARMINSTERPA AIRCRAFT AND CREW SYSTEMS TECHNOLOGY DIRECTORATE Personal Author: Zenobi, Thomas J. Report Date: December 19, 1978 Media: 36 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 393532 From the collection: Technical 13. | Full Text pdf - 1 MB Title: Development of an Inflatable Head/Neck Restraint System for Ejection Seats AD Number: ADA038762 Corporate Author: NAVAL AIR DEVELOPMENT CENTER WARMINSTERPA CREW SYSTEMS DEPT Personal Author: Zenobi, Thomas J. Report Date: February 28, 1977 Media: 32 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 406610 From the collection: Technical 14. | Full Text pdf - 8 MB Title: EJECTION SEAT TESTS CONDUCTED ON THE 10,000 FOOT AERODYNAMIC RESEARCH TRACK AT EDWARDS AIR FORCE BASE AD Number: AD0142103 Corporate Author: AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OH Personal Author: HODELL, C. K. ROSNER, A. H. Report Date: November 01, 1957 Media: 93 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 012070 From the collection: Technical 15. | Full Text pdf - 1 MB Title: Footrests on Upward Ejection Seats AD Number: ADA075860 Corporate Author: WRIGHT AIR DEVELOPMENT CENTER WRIGHT-PATTERSON AFB OH Personal Author: Rothwell, Walter S. Sperry, Edward G. Report Date: September 01, 1952 Media: 21 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 400358 From the collection: Technical 16. | Full Text pdf - 2 MB Title: Biomedical Re of Aircrew Weight as a Risk Factor in CT 133 and CT 114 Ejections: 1970 - 1998 AD Number: ADA385589 Corporate Author: DEFENCE AND CIVIL INST OF ENVIRONMENTALMEDICINE DOWNS (ONTARIO) Personal Author: Wright, H. L. Salisbury, D. A. Bateman, W. A. Report Date: August 15, 2000 Media: 35 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 406986 From the collection: Technical Report 17. | Full Text pdf - 4 MB Title: Analysis of Incidents of Crew Ejection from Selected U.S. Tactical Fighter Aircraft AD Number: ADA372970 Corporate Author: INSTITUTE FOR DEFENSE ANALYSES ALEXANDRIA VA Personal Author: Schwartz, Joshua A. Woolsey, James P. Nelson, J. Richard Report Date: November 01, 1999 Media: 94 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 179350 From the collection: Technical 18. | Full Text pdf - 1 MB Title: Dynamic Strength Capabilities of Small Stature Females to Eject and Support Added Head Weight. AD Number: ADA367876 Corporate Author: NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD Personal Author: Shender, Barry Heffner, Peggy Report Date: August 03, 1999 Media: 37 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 424295 From the collection: Technical 19. | Full Text pdf - 595 KB Title: USN/USMC Ejection Seat Equipped Aircraft Anthropometric Accommodation AD Number: ADA377912 Corporate Author: NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD Personal Author: Kennedy, Greg Report Date: January 01, 1999 Media: 14 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 424295 From the collection: Technical 20. | Full Text pdf - 536 KB Title: The Use of Ejection Simulation in Mishap Investigations AD Number: ADA368764 Corporate Author: NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD Personal Author: Nichols, Jeffrey P. Report Date: September 10, 1998 Media: 9 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 424295 From the collection: Technical 21. | Full Text pdf - 6 MB Title: +GZ Impact Tests of the Large JPATS Manikin in a Simulated Martin-Baker Ejection Seat. AD Number: ADA344944 Corporate Author: ARMSTRONG LAB WRIGHT-PATTERSON AFB OH BIODYNAMICS AND BIOCOMMUNICATIONS DIV Personal Author: Buhrman, John R. Report Date: October 01, 1997 Media: 179 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 423430 From the collection: Technical 22. | Full Text pdf - 3 MB Title: Small Aircrew Ejection Simulation in U.S. Navy Aircraft. AD Number: ADA311652 Corporate Author: NAVAL AIR WARFARE CENTER AIRCRAFT DIV WARMINSTER PA Personal Author: Nichols, Jeffrey P. Quartuccio, John J. Marquette, Thomas J. Report Date: January 01, 1996 Media: 79 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 424688 From the collection: Technical 23. | Full Text pdf - 318 KB Title: Development and Testing of a New Reefing System to Reduce Parachute Opening Shock Characteristics During Seat Ejection AD Number: ADA395743 Corporate Author: SYSTEMS RESEARCH LABS INC DAYTON OH Personal Author: Brinkman, John C. Report Date: November 01, 1992 Media: 7 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 340400 From the collection: Technical 24. | Full Text pdf - 1 MB Title: Tight Ribbon Arm Protection (TRAP) for Aircrewman Ejection AD Number: ADA150464 Corporate Author: NAVAL AIR DEVELOPMENT CENTER WARMINSTERPA AIRCRAFT AND CREW SYSTEMS TECHNOLOGY DIRECTORATE Personal Author: Lorch, Dan Schultz, Michael Report Date: July 01, 1984 Media: 25 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 393532 From the collection: Technical 25. | Full Text pdf - 825 KB Title: Development of a Supported Airbag Ejection Restraint (SABER) for Windblast Protection AD Number: ADA109807 Corporate Author: NAVAL AIR DEVELOPMENT CENTER WARMINSTERPA AIRCRAFT AND CREW SYSTEMS TECHNOLOGY DIRECTORATE Personal Author: Lorch, Dan Report Date: November 04, 1981 Media: 21 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 393532 From the collection: Technical 26. | Full Text pdf - 1 MB Title: Simulation of the Motion of the Center of Mass of an Occupant under Ejection Accelerations AD Number: ADA113806 Corporate Author: NAVAL AIR DEVELOPMENT CENTER WARMINSTERPA AIRCRAFT AND CREW SYSTEMS TECHNOLOGY DIRECTORATE Personal Author: D'Aulerio, Louis A. Frisch, Georg D. Report Date: September 01, 1981 Media: 45 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 393532 From the collection: Technical 27. | Full Text pdf - 422 KB Title: Non-Fatal Ejection Vertebral Fracture and its Prevention AD Number: ADA395716 Corporate Author: NAVAL AEROSPACE MEDICAL RESEARCH LAB DETACHMENT MICHOUD NEW ORLEANS LA Personal Author: Ewing, Channing L. Report Date: January 01, 1972 Media: 8 Pages(s) Distribution Code: 01 - APPROVED FOR PUBLIC RELEASE Report Classification: (Not Available). Source Code: 391221 From the collection: Technical
Author:
Publisher:
ISBN:
Category : Great Britain
Languages : en
Pages : 208
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Book Description
Author: Demoz Gebre-Egziabher
Publisher: Artech House
ISBN: 1596933305
Category : Technology & Engineering
Languages : en
Pages : 528
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Book Description
Over the past few years, the growth of GNSS applications has been staggering. And, this trend promises to continue in the foreseeable future. Placing emphasis on applications development, this unique resource offers a highly practical overview of GNSS (global navigation satellite systems), including GPS. The applications presented in the book range from the traditional location applications to combining GNSS with other sensors and systems and into more exotic areas, such as remote sensing and space weather monitoring. Written by leading experts in the field, this book presents the fundamental underpinnings of GNSS and provides you with detailed examples of various GNSS applications. Moreover, the software included with the book contains valuable processing tools and real GPS data sets to help you rapidly advance your own work in the field. You will find critical information and tools that help give you a head start to embark on future research and development projects. DVD Included! Contains valuable processing tools and data sets to complement many of the applications presented in the book. The software allows you to apply the details presented in the book and expand and enhance the provided code examples to suit your individual applications.
Author: Joseph L. Awange
Publisher: Springer Science & Business Media
ISBN: 3540882561
Category : Technology & Engineering
Languages : en
Pages : 387
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Book Description
Global Navigation Satellite Systems (GNSS) are revolutionizing the world in a way their original developers never envisaged. From being military “war” tools, GNSS satellites are rapidly becoming “peace” tools that play a potentially critical role in enabling changing environmental phenomenon that do not permit direct measurements to be remotely observed via their all-weather, highly accurate and continuously updatable positional time series. This is evident, for example, in their use in emerging environmental monitoring methods that are considered in this book. These include: GPS-based radio telemetry, which is enhancing ecological and conservation monitoring by more accurately mapping animal movements, their behaviours, and their impact on the environment; GNSS-meteorology, which is contributing to weather and climate change studies; GNSS-remote sensing, which, for example, allows the rapid monitoring of changes in fresh water resources and cryosphere; Geosensor network techniques, which are earning a crucial role in disaster response management; Epidemiology, for improved efficiency in tracking and studying the spread of infectious diseases and climate change effects on vector-borne diseases; and Economics, to provide data for the econometric modelling of casual impact of policies. In Environmental Impact Assessments (EIA), Strategic Environmental Assessments (SEA), and Sustainability Assessments (SA), GNSS, together with other spaced-based remote sensing techniques, are emerging, not only as modern tools that connect the developers to the community, but also provide information that support Multi-Criteria Analysis (MCA) methods, which inform decision making and policy formulations. By bringing the two fields of geodesy (the parent of GNSS technology) and environmental studies (potential users of this technology), this book presents the concepts of GNSS in a simplified way that can, on the one hand, be understood and utilised by environmentalists, while on the other, outlines its potential applications to environmental monitoring and management for those engaged more with its technology, which hopefully will further energise the already innovative research that is being carried out. Lastly, this book is most relevant to all the professionals whose work is related to the environment such as hydrologists, meteorologists, epidemiologists, economist, and engineers, to name just a few. A comprehensive yet candid and compelling presentation of Global Navigation Satellite Systems and its application to environmental monitoring and a host of other socio-economic activities. This is an essential and new ground breaking reading for all professional practitioners and even academics seeking to study and become involved in using Global Navigation Satellite Systems in diverse fields ranging from environmental monitoring to economic activities such as monitoring weather and climate in order to design crop failure insurance. Nathaniel O. Agola, Professor of Business and Financial Economics, Ritsumeikan University, Japan
Author: Fernando Sansò
Publisher: Springer Science & Business Media
ISBN: 3540274324
Category : Science
Languages : en
Pages : 625
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Book Description
These proceedings represent the worldwide picture of the state of the art of geodesy. The volume comprehensively covers the most recent results and supplies a good review of the new ideas developing in the field, opening a window to the future of geodesy.
