White Paper: Overcoming Issues in Precise Navigational Methods

Dr. Donald R. Erbschloe recently released a white paper on navigational methods which is available from Psionic in two formats: an excerpt publication (immediate download) or full white paper (request).

Psionic Technical Brief: Errors and Uncertainty in GPS Navigation (Excerpt)

Dr. Donald R. Erbschloe, Erbschloe Technical Consulting

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White Paper: Overcoming Issues in Precise Navigational Methods

Dr. Donald R. Erbschloe, Erbschloe Technical Consulting

Request White Paper >

Abstract (Full Version)

Measurement of position to within a few centimeters is readily available today, allowing unprecedented precision in navigation. This has been made possible through numerous improvements in methods and technology. The tools we employ and the way we use them have inherent errors and vulnerabilities, which jeopardize surety. The variety of methods can be understood in a framework which suggests a multi-element approach to safeguard precision.

White Paper Contents (Full Version)

Abstract 2

Introduction: A simple model of navigation 2
Figure 1: The navigation process for an aircraft 2

Exploiting cues for navigation 3

Navigational techniques 4
Piloting 4
Terrain matching 4
Celestial navigation 4
Magnetic compass navigation 4
Beaconing and radio navigation 4
Signals of opportunity 5
Inertial Navigation System 5
Figure 2: Grade, cost, and performance parameters for IMUs , , , 5
Navigation/Strategic 5
Tactical 5
Industrial/Commercial 5
Grade 5
Cost 5
Gyroscope Bias Stability 5
Accelerator Bias Stability 5

Errors and uncertainty in GPS navigation 6
Table 2: GPS errors, causes, effects, and remedies 6
Errors and Issues 6
Description 6
Effect Magnitude 6
Remediation 6
Satellite issues 6
Orbital Mechanics and Relativity 7
Signal propagation 7
Receiver issues 7
Intentional issues (human-caused) 8
Unintentional issues 8

Historical example: trend in precise targeting 8
Figure 3: Exponential reduction in sorties/target due to PNT advances 9

Conclusion: Integrated solutions using complementary navigation approaches 10

About Dr. Donald R. Erbschloe, Erbschloe Technical Consulting 11

About Psionic 11

References 12

About Dr. Donald R. Erbschloe

Former Chief Scientist of the Air Force Air Mobility Command (AMC), Commander and Deputy Director of the Air Force Office of Scientific Research, Chief Operations Officer at the Office of Science at the Department of Energy overseeing ten world-class laboratories, and Air Force command pilot with 4,000 flying hours. Ph.D. in physics from the University of Oxford. Founder of Erbschloe Technical Consulting.