Bradford Parkinson
Edward C. Wells Professor in the School of Engineering, Emeritus
Aeronautics and Astronautics
Bio
Professor Bradford Parkinson was the Chief Architect for GPS, and led the original advocacy for the system in 1973 as an Air Force Colonel. Gaining approval, he became the first Director of the GPS Joint Program Office and led the original development of spacecraft, Master Control Station and 8 types of User Equipment. He continued leadership of the Program through the extensive test validation Program, including being the Launch Commander for the first GPS satellite launches. This original deployment of GPS demonstrated comfortable margins against all PNT (Positioning, Navigation, and Timing) requirements.
Earlier in his career, he was a key developer of a modernized AC-130 Gunship, introduction of which included 160 hours of combat missions. He was an instructor at the USAF Test Pilot School. In addition he led the Department of Astronautics and Computer Science at the US Air Force Academy. He retired from the US Air Force as a Colonel.
He was appointed a Professor at Stanford University in 1984, after six years of experience in industry. At Stanford University, he led the development of many innovative applications of GPS, including:
1.Commercial aircraft (Boeing 737) blind landing using GPS alone,
2.Fully automatic GPS control of Farm Tractors on a rough field to an accuracy of 2 inches,
3.Pioneering the augmentation to GPS (WAAS) that allows any user to achieve accuracies of 2 feet and very high levels of integrity assurance.
He has been the CEO of two companies, and serves on many boards. He is the editor/author of the AIAA Award winning 2 Volumes: “GPS Theory and Applications” and is author or coauthor of over 80 technical papers.
Among his many awards is the Draper Prize of the National Academy of Engineering, considered by some to be the “Engineering Nobel”.
Honors & Awards
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Medal of Honor, IEEE (2018)
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Honorary Fellow, AIAA (2017)
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Marconi Award, The Marconi Society (2016)
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Hall of Fame, Engineer's Club of Dayton (2015)
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Honorary Fellow, Royal Institute of Navigation (2014)
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Engineering Hero, Stanford University (2012)
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Necho Award, International Association of Institutes of Navigation (2012)
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The Rheim Technology Prize, Eduard Rheim Institute, Munich (2012)
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Distinguished Graduate, US Naval Academy (2011)
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Pioneer's Award, US Space Command (2009)
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Lloyd Berkner Award, American Astronautical Society (2008)
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Silicon Valley Hall of Fame, Silicon Valley Engineering Council (2007)
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Goddard Astronautics Award, AIAA (2006)
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ASME Gold Medal Award, American Society of Mechanical Engineers (2004)
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Fellow, IEEE (2004)
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Member, National Inventors Hall of Fame (2004)
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Charles Stark Draper Prize, NAE (2003)
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Discover Innovation Award for Communications, Discover Magazine (2002)
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Simon Ramo Award, IEEE (2002)
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Distinguished Public Service Medal, NASA (2001)
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Fellow, The Institute of Navigation (ION) (1999)
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Hall of FAME, NASA (1998)
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Sperry Award, IEEE (1998)
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Magellanic Premium Award, American Philosophical Society (1997)
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Member, International Academy of Astronautics (IAA) (1997)
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Von Karman Lectureship, AIAA (1996)
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Edward C Wells Professor of Aeronautics & Astronautics, Stanford University (1995)
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GPS Hall of Fame Award, NAVSTAR Joint Program Office (1995)
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Pioneer Award, AESS/IEEE (1994)
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Public Service Medal, NASA (1994)
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Johannes Kepler Award, ION (1991)
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Fellow, The Royal Institute of Navigation (1990)
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Fellow, American Institute of Aeronautics & Astronautics (AIAA) (1990)
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Member, National Academy of Engineers (NAE) (1990)
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Burka Award, ION (1987)
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Kirschner Award, IEEE (1986)
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Thurlow Award, ION (1986)
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Engineer of the Year for Silicon Valley, AIAA (1985)
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Gold Medal Award, Royal Inst. of Navigation (1983)
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Legion of Merit, US Air Force (1978)
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Defense Department Superior Performance Award, NAVSTAR (GPS) GPO (1977)
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Bronze Star, US Air Force (1970)
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Presidential Unit Citation, Dept. Of Defense (1970)
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Air Medals (2), US Air Force (1969)
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Member, Sigma Xi (1961)
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Member, Tau Beta Pi (MIT Chapter) (1961)
Boards, Advisory Committees, Professional Organizations
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Member, National Academy of Engineering (2013 - Present)
Professional Education
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PhD, Stanford University (1966)
2023-24 Courses
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Independent Studies (2)
- Directed Research and Writing in Aero/Astro
AA 190 (Sum) - Independent Study in Aero/Astro
AA 199 (Sum)
- Directed Research and Writing in Aero/Astro
All Publications
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Gravity Probe B data analysis: III. Estimation tools and analysis results
CLASSICAL AND QUANTUM GRAVITY
2015; 32 (22)
View details for DOI 10.1088/0264-9381/32/22/224020
View details for Web of Science ID 000365340500021
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Gravity Probe B: Final Results of a Space Experiment to Test General Relativity
PHYSICAL REVIEW LETTERS
2011; 106 (22)
Abstract
Gravity Probe B, launched 20 April 2004, is a space experiment testing two fundamental predictions of Einstein's theory of general relativity (GR), the geodetic and frame-dragging effects, by means of cryogenic gyroscopes in Earth orbit. Data collection started 28 August 2004 and ended 14 August 2005. Analysis of the data from all four gyroscopes results in a geodetic drift rate of -6601.8±18.3 mas/yr and a frame-dragging drift rate of -37.2±7.2 mas/yr, to be compared with the GR predictions of -6606.1 mas/yr and -39.2 mas/yr, respectively ("mas" is milliarcsecond; 1 mas=4.848×10(-9) rad).
View details for DOI 10.1103/PhysRevLett.106.221101
View details for Web of Science ID 000291093600003
View details for PubMedID 21702590
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Looking Ahead for GPtS
23rd International Technical Meeting of the Satellite Division of the Institute-of-Navigation (ION GNSS-2010)
INST NAVIGATION. 2010: 1–45
View details for Web of Science ID 000290734900001
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Gravity Probe B Data Analysis
Workshop on Probing the Nature of Gravity - Confronting Theory and Experiment in Space
SPRINGER. 2009: 53–69
View details for DOI 10.1007/s11214-009-9524-7
View details for Web of Science ID 000273812800006
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Gravity Probe B(*)
RIVISTA DEL NUOVO CIMENTO
2009; 32 (11): 555-589
View details for DOI 10.1393/ncr/i2009-10049-y
View details for Web of Science ID 000273677400001
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Gravity Probe B data analysis status and potential for improved accuracy of scientific results
18th International Conference on General Relativity and Gravitation/7th Edoardo Amaldi Conference on Gravitational Waves
IOP PUBLISHING LTD. 2008
View details for DOI 10.1088/0264-9381/25/11/114002
View details for Web of Science ID 000255897200003
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Gravity probe B - Testing Einstein at the limits of engineering
3rd International Conference on Particle and Fundamental Physics in Space
ELSEVIER SCIENCE BV. 2007: 147–152
View details for DOI 10.1016/j.nuclphysbps.2006.12.090
View details for Web of Science ID 000245634200023
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Cascaded Kalman filters for accurate estimation of multiple biases, dead-reckoning navigation, and full state feedback control of ground vehicles
IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY
2007; 15 (2): 199-208
View details for DOI 10.1109/TCST.2006.883311
View details for Web of Science ID 000245247800001
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Calibration of strapdown magnetometers in magnetic field domain
JOURNAL OF AEROSPACE ENGINEERING
2006; 19 (2): 87-102
View details for DOI 10.1061/(ASCE)0893-1321(2006)19:2(87)
View details for Web of Science ID 000236197900004
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Gravitational experiments in space: Gravity probe B and STEP
2nd International Conference on Particle and Fundamental Physics in Space
ELSEVIER SCIENCE BV. 2004: 147–154
View details for DOI 10.1016/j.nuclphysbps.2004.08.024
View details for Web of Science ID 000225284000025
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Effect of the error in line of sight unit vector on the accuracy of GPS and pseudolite navigation system
COMPUTERS & MATHEMATICS WITH APPLICATIONS
2004; 48 (5-6): 779-787
View details for DOI 10.1016/j.camwa.2004.02.004
View details for Web of Science ID 000225514200011
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A new yaw dynamic model for improved high speed control of a farm tractor
JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND CONTROL-TRANSACTIONS OF THE ASME
2002; 124 (4): 659-667
View details for DOI 10.1115/1.1515329
View details for Web of Science ID 000180232400021
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Credibility of GP-B'S gyroscopic test of general relativity
25th Annual AAS Rocky Mountain Guidance and Control Conference
UNIVELT INC. 2002: 271–281
View details for Web of Science ID 000177552600019
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Cryogenic gyroscopes for the relativity mission
22nd International Conference on Low Temperature Physics
ELSEVIER SCIENCE BV. 2000: 497–98
View details for Web of Science ID 000086333700144
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The Gravity Probe B relativity mission
HO 1 Symposium of COSPAR Scientific Commission H Held at the 32nd COSPAR Scientific Assembly
PERGAMON PRESS LTD. 2000: 1177–80
View details for Web of Science ID 000085558300012
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Use of global positioning system for gravity probe B relativity experiment and co-experiments
HO 1 Symposium of COSPAR Scientific Commission H Held at the 32nd COSPAR Scientific Assembly
PERGAMON PRESS LTD. 2000: 1199–1203
View details for Web of Science ID 000085558300017
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Gyroscopes and charge control for the Relativity Mission Gravity Probe B
HO 1 Symposium of COSPAR Scientific Commission H Held at the 32nd COSPAR Scientific Assembly
PERGAMON PRESS LTD. 2000: 1181–84
View details for Web of Science ID 000085558300013
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System identification and adaptive steering of tractors utilizing differential Global Positioning System
JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
1999; 22 (5): 671-674
View details for Web of Science ID 000082829500008
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Control of flexible structures using GPS: Methods and experimental results
JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
1998; 21 (5): 673-683
View details for Web of Science ID 000075617900001
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Realistic autofarming closed-loop tractor control over irregular paths using kinematic GPS
JOURNAL OF NAVIGATION
1998; 51 (3): 327-335
View details for Web of Science ID 000076858800006
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Autonomous fault detection and removal using GPS carrier phase
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
1998; 34 (3): 897-906
View details for Web of Science ID 000075113400018
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LMS identification of systems with dynamics and an output deadzone
American Control Conference
IEEE. 1998: 2770–2774
View details for Web of Science ID 000075568200594
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Cycle ambiguity estimation for aircraft precision landing using the global positioning system
JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
1997; 20 (4): 681-689
View details for Web of Science ID A1997XJ43600008
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Comparison of master station and user algorithms for wide-area augmentation system
JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
1997; 20 (1): 170-176
View details for Web of Science ID A1997WC64500024
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Operational experience with and improvements to a tunnel-in-the-sky display for light aircraft
10th International Technical Meeting of the Satellite Division of the Institute-of-Navigation
INST NAVIGATION. 1997: 791–799
View details for Web of Science ID 000073331000079
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System identification of an autonomous aircraft using GPS
10th International Technical Meeting of the Satellite Division of the Institute-of-Navigation
INST NAVIGATION. 1997: 1065–1071
View details for Web of Science ID 000073331000110
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Optimal augmentation of GPS using inexpensive geosynchronous navigation satellites
10th International Technical Meeting of the Satellite Division of the Institute-of-Navigation
INST NAVIGATION. 1997: 1271–1281
View details for Web of Science ID 000073331000134
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System identification and robust control of farm vehicles using CDGPS
10th International Technical Meeting of the Satellite Division of the Institute-of-Navigation
INST NAVIGATION. 1997: 1415–1424
View details for Web of Science ID 000073331000150
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Real-time CDGPS initialization for land vehicles using a single pseudolite
ION National Meeting on Navigation and Positioning in the Information Age
INST NAVIGATION. 1997: 717–724
View details for Web of Science ID 000071004000068
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Origins, evolution, and future of satellite navigation
AIAA 34th Aerospace Sciences Meeting and Exhibit
AMER INST AERONAUT ASTRONAUT. 1997: 11–25
View details for Web of Science ID A1997WC64500002
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The application of LEOS to cycle ambiguity resolution on Navstar transmissions for kinematic carrier-phase positioning
10th International Technical Meeting of the Satellite Division of the Institute-of-Navigation
INST NAVIGATION. 1997: 867–881
View details for Web of Science ID 000073331000088
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Flight test evaluation of a prototype local area augmentation system architecture
10th International Technical Meeting of the Satellite Division of the Institute-of-Navigation
INST NAVIGATION. 1997: 1613–1621
View details for Web of Science ID 000073331000172
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Experimental techniques for gyroscope performance enhancement for the gravity probe B relativity mission
Symposium on Fundamental Physics in Space (STEP, LISA and Other Space Projects)
IOP PUBLISHING LTD. 1996: A185–A191
View details for Web of Science ID A1996VW31300026
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Optimal recursive iterative algorithm for discrete nonlinear least-squares estimation
JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
1996; 19 (3): 643-649
View details for Web of Science ID A1996UJ91600020
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Wide area differential GPS (WADGPS): Future navigation system
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
1996; 32 (2): 795-808
View details for Web of Science ID A1996UG10900028
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Integration of wide area DGPS with local area kinematic DGPS
IEEE 1996 Position Location and Navigation Symposium (PLANS 96)
I E E E. 1996: 523–529
View details for Web of Science ID A1996BF52A00077
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Gyroscope spin axis direction control for the Gravity Probe B satellite
35th IEEE Conference on Decision and Control
IEEE. 1996: 480–485
View details for Web of Science ID A1996BH27F00104
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Techniques for real-time control of flexible structures using GPS
Annual Rocky Mountain Guidance and Control Conference
UNIVELT INC. 1996: 429–438
View details for Web of Science ID A1996BF88Q00029
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Parity space methods for autonomous fault detection and exclusion using GPS carrier phase
IEEE 1996 Position Location and Navigation Symposium (PLANS 96)
I E E E. 1996: 649–656
View details for Web of Science ID A1996BF52A00095
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Applications of superconductivity to space-based gravitational experiments
21st International Conference on Low Temperature Physics (LT 21)
INST PHYSICS ACAD SCI CZECH REPUBLIC. 1996: 2869–2870
View details for Web of Science ID A1996VL44200223
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Generation of ionospheric correction and confidence estimates for WAAS
52nd Annual Meeting of the Institute-of-Navigation on Navigational Technology for the 3rd Millenium
INST NAVIGATION. 1996: 139–146
View details for Web of Science ID A1996BJ47X00017
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Control system optimization with unbounded uncertainty: Application to aircraft precision approach using GPS
35th IEEE Conference on Decision and Control
IEEE. 1996: 1339–1340
View details for Web of Science ID A1996BH27F00290
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Quality control algorithms on Wide-area Reference Station for WAAS
52nd Annual Meeting of the Institute-of-Navigation on Navigational Technology for the 3rd Millenium
INST NAVIGATION. 1996: 487–495
View details for Web of Science ID A1996BJ47X00054
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Effects of local ionospheric anomalies on navigation performance and integrity using WAAS
IEEE 1996 Position Location and Navigation Symposium (PLANS 96)
I E E E. 1996: 574–581
View details for Web of Science ID A1996BF52A00084
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Observed GPS signal continuity interruptions
8th International Technical Meeting of the Satellite Division of the Institute-of-Navigation (ION GPS-95)
INST NAVIGATION. 1995: 793–795
View details for Web of Science ID A1995BE72A00085
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Flight tests of a 3-D perspective-view glass-cockpit display for general aviation using GPS
8th International Technical Meeting of the Satellite Division of the Institute-of-Navigation (ION GPS-95)
INST NAVIGATION. 1995: 1615–1622
View details for Web of Science ID A1995BE72A00173
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GPS receiver design and requirement analysis for the Stanford Gravity Probe B Relativity Mission
8th International Technical Meeting of the Satellite Division of the Institute-of-Navigation (ION GPS-95)
INST NAVIGATION. 1995: 237–246
View details for Web of Science ID A1995BE72A00028
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Global optimization of GPS augmentation architectures using genetic algorithms
8th International Technical Meeting of the Satellite Division of the Institute-of-Navigation (ION GPS-95)
INST NAVIGATION. 1995: 1403–1415
View details for Web of Science ID A1995BE72A00150
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Maintaining GPS positioning in steep turns using two antennas
8th International Technical Meeting of the Satellite Division of the Institute-of-Navigation (ION GPS-95)
INST NAVIGATION. 1995: 1451–1459
View details for Web of Science ID A1995BE72A00155
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Precision landing tests with improved integrity beacon pseudolites
8th International Technical Meeting of the Satellite Division of the Institute-of-Navigation (ION GPS-95)
INST NAVIGATION. 1995: 827–833
View details for Web of Science ID A1995BE72A00089
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The Stanford Relativity Mission ''Niobium Bird'': Verification of the science mission by experimental application of a new nonlinear estimation algorithm
Annual Rocky-Mountain Guidance and Control Conference
UNIVELT INC. 1995: 3–18
View details for Web of Science ID A1995BD65K00001
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Autolanding a 737 using GPS and integrity beacons
AIAA/IEEE 14th Digital Avionics Systems Conference (14th DASC)
I E E E. 1995: 474–482
View details for Web of Science ID A1995BE61E00077
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Kinematic GPS for closed-loop control or farm and construction vehicles
8th International Technical Meeting of the Satellite Division of the Institute-of-Navigation (ION GPS-95)
INST NAVIGATION. 1995: 1261–1268
View details for Web of Science ID A1995BE72A00135
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Incorporation of orbital dynamics to improve wide-area differential GPS
8th International Technical Meeting of the Satellite Division of the Institute-of-Navigation (ION GPS-95)
INST NAVIGATION. 1995: 647–659
View details for Web of Science ID A1995BE72A00071
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An algorithm for inter-frequency bias calibration and application to WAAS ionosphere modeling
8th International Technical Meeting of the Satellite Division of the Institute-of-Navigation (ION GPS-95)
INST NAVIGATION. 1995: 639–646
View details for Web of Science ID A1995BE72A00070
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HISTORY AND OPERATION OF NAVSTAR, THE GLOBAL POSITIONING SYSTEM
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
1994; 30 (4): 1145-1161
View details for Web of Science ID A1994PM67800029
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SPACE-FLIGHT TESTS OF ATTITUDE DETERMINATION USING GPS
INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS
1994; 12 (5): 427-433
View details for Web of Science ID A1994PR20900003
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Ultra precision machining: Quiet hydraulics and computer support research
1995 NSF Design and Manufacturing Grantees Conference
SOC MANUFACTURING ENGINEERS. 1994: 313–314
View details for Web of Science ID A1994BG45A00153
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DEVELOPMENT OF A GPS RECEIVER FOR RELIABLE REAL-TIME ATTITUDE DETERMINATION IN SPACE
7th International Technical Meeting of the Satellite-Division of the Institute-of-Navigation (ION GPS-94)
INST NAVIGATION. 1994: 1677–1684
View details for Web of Science ID A1994BC96F00184
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System design under uncertainty: Evolutionary optimization of the Gravity Probe-B spacecraft
3rd International Conference on Parallel Problem Solving from Nature (PPSN III)
SPRINGER-VERLAG BERLIN. 1994: 598–607
View details for Web of Science ID 000256957600058
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FLIGHT TEST RESULTS OF AUTOCOUPLED APPROACHES USING GPS AND INTEGRITY BEACONS
7th International Technical Meeting of the Satellite-Division of the Institute-of-Navigation (ION GPS-94)
INST NAVIGATION. 1994: 1145–1153
View details for Web of Science ID A1994BC96F00127
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KINEMATIC GPS LANDING SYSTEM ARCHITECTURE AND FLIGHT TEST-RESULTS
1994 IEEE National Telesystems Conference/1994 International Microwave Symposium
I E E E. 1994: 101–101
View details for Web of Science ID A1994BA73D00023
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AUTONOMOUS INTEGRITY MONITORING FOR GPS-BASED PRECISION LANDING USING GROUND-BASED INTEGRITY BEACON PSEUDOLITES
7th International Technical Meeting of the Satellite-Division of the Institute-of-Navigation (ION GPS-94)
INST NAVIGATION. 1994: 609–618
View details for Web of Science ID A1994BC96F00068
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CALIBRATION OF MULTIPATH ERRORS ON GPS PSEUDORANGE MEASUREMENTS
7th International Technical Meeting of the Satellite-Division of the Institute-of-Navigation (ION GPS-94)
INST NAVIGATION. 1994: 353–362
View details for Web of Science ID A1994BC96F00039
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A NEW APPROACH TO GPS INTEGRITY MONITORING USING PRIOR PROBABILITY-MODELS AND OPTIMAL THRESHOLD SEARCH
IEEE 1994 Position Location and Navigation Symposium
I E E E. 1994: 739–746
View details for Web of Science ID A1994BA74E00104
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ANALYSIS OF ANGULAR VELOCITY DETERMINATION USING GPS
7th International Technical Meeting of the Satellite-Division of the Institute-of-Navigation (ION GPS-94)
INST NAVIGATION. 1994: 697–706
View details for Web of Science ID A1994BC96F00078
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ANALYSIS OF SPACECRAFT ATTITUDE MEASUREMENTS USING ONBOARD GPS
Annual Rocky Mountain Guidance and Control Conference
UNIVELT INC. 1994: 521–532
View details for Web of Science ID A1994BB14W00035
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WIDE AREA DIFFERENTIAL GPS AS A FUTURE NAVIGATION SYSTEM IN THE UNITED-STATES
IEEE 1994 Position Location and Navigation Symposium
I E E E. 1994: 788–795
View details for Web of Science ID A1994BA74E00111
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SIMULATION-BASED EVALUATION OF WAAS PERFORMANCE - RISK AND INTEGRITY FACTORS
7th International Technical Meeting of the Satellite-Division of the Institute-of-Navigation (ION GPS-94)
INST NAVIGATION. 1994: 975–983
View details for Web of Science ID A1994BC96F00108
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FLIGHT TRIALS OF THE WIDE AREA AUGMENTATION SYSTEM (WAAS)
7th International Technical Meeting of the Satellite-Division of the Institute-of-Navigation (ION GPS-94)
INST NAVIGATION. 1994: 1537–1546
View details for Web of Science ID A1994BC96F00169
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ANTENNA BASELINE AND LINE BIAS ESTIMATION USING PSEUDOLITES FOR GPS-BASED ATTITUDE DETERMINATION
7th International Technical Meeting of the Satellite-Division of the Institute-of-Navigation (ION GPS-94)
INST NAVIGATION. 1994: 717–726
View details for Web of Science ID A1994BC96F00080
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THEORY AND DESIGN OF PSEUDOLITES
1994 National Technical Meeting on Navigating the Earth and Beyond
INST NAVIGATION. 1994: 69–75
View details for Web of Science ID A1994BC49J00010
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THE GRAVITY PROBE-B NIOBIUM BIRD EXPERIMENT - VERIFYING THE DATA REDUCTION SCHEME FOR ESTIMATING THE RELATIVISTIC PRECESSION OF EARTH-ORBITING GYROSCOPES
AAS/AIAA Spaceflight Mechanics Meeting
UNIVELT INC. 1993: 1375–1393
View details for Web of Science ID A1993BZ64V00084
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FLIGHT TESTS OF ATTITUDE DETERMINATION USING GPS COMPARED AGAINST AN INERTIAL MEASUREMENT UNIT
National Technical Meeting of the Institute-of-Navigation on Evolution Through Integration of Current and Emerging Systems
INST NAVIGATION. 1993: 579–587
View details for Web of Science ID A1993BA73Z00059
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ESTIMATION OF GYROSCOPE POLHODE MOTION USING TRAPPED MAGNETIC-FLUX
JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
1992; 15 (1): 152-158
View details for Web of Science ID A1992GZ89700019
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ESTIMATION OF ABSOLUTE IONOSPHERIC DELAY EXCLUSIVELY THROUGH SINGLE-FREQUENCY GPS MEASUREMENTS
5TH INTERNATIONAL TECHNICAL MEETING OF THE SATELLITE DIVISION OF THE INST OF NAVIGATION : ION GPS-92
INST NAVIGATION. 1992: 325–330
View details for Web of Science ID A1992BY57K00034
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ALGORITHMS AND IMPLEMENTATION OF WIDE AREA DIFFERENTIAL GPS
5TH INTERNATIONAL TECHNICAL MEETING OF THE SATELLITE DIVISION OF THE INST OF NAVIGATION : ION GPS-92
INST NAVIGATION. 1992: 565–572
View details for Web of Science ID A1992BY57K00060
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2 STUDIES OF HIGH-PERFORMANCE ATTITUDE DETERMINATION USING GPS - GENERALIZING WAHBA PROBLEM FOR HIGH-OUTPUT RATES AND EVALUATION OF STATIC ACCURACY USING A THEODOLITE
5TH INTERNATIONAL TECHNICAL MEETING OF THE SATELLITE DIVISION OF THE INST OF NAVIGATION : ION GPS-92
INST NAVIGATION. 1992: 1197–1203
View details for Web of Science ID A1992BY57K00128
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A MAGNETIC ATTITUDE-CONTROL SYSTEM FOR PRECISION POINTING OF THE ROLLING GP-B SPACECRAFT
40TH CONGRESS OF THE INTERNATIONAL ASTRONAUTICAL FEDERATION
PERGAMON-ELSEVIER SCIENCE LTD. 1990: 477–86
View details for Web of Science ID A1990EC38700014
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AIRCRAFT AUTOMATIC LANDING SYSTEMS USING GPS
JOURNAL OF NAVIGATION
1989; 42 (1): 47-59
View details for Web of Science ID A1989R948200004
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THE GRAVITY-PROBE-B RELATIVITY GYROSCOPE EXPERIMENT - DEVELOPMENT OF THE PROTOTYPE FLIGHT INSTRUMENT
SYMP OF THE COSPAR 27TH PLENARY MEETING ON RELATIVISTIC GRAVITATION
PERGAMON PRESS LTD. 1989: 29–38
View details for Web of Science ID A1989BQ02M00004
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ENGINEERING TECHNOLOGY FOR PHYSICS EXPERIMENTS IN SPACE
SYMP OF THE COSPAR 27TH PLENARY MEETING ON RELATIVISTIC GRAVITATION
PERGAMON PRESS LTD. 1989: 5–11
View details for Web of Science ID A1989BQ02M00001
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THE GRAVITY PROBE-B RELATIVITY GYROSCOPE PROGRAM
WORKSHOP ON RELATIVISTIC GRAVITATIONAL EXPERIMENTS IN SPACE
NASA. 1989: 118–125
View details for Web of Science ID A1989BP76L00020