Andrew Graham Dempster

Title: Innovations of Andrew Graham Dempster

Introduction

Andrew Graham Dempster is a notable inventor based in Coogee, Australia. He has made significant contributions to the field of satellite-based positioning systems. With a total of 6 patents to his name, Dempster's work focuses on improving the accuracy and reliability of location determination using weak satellite signals.

Latest Patents

One of Dempster's latest patents is a method, device, and system for determining a receiver's location using weak signal satellite transmissions. This invention involves a sequence of exchanges between an aiding source and a receiver, providing aiding information that allows the receiver to determine its location even in the presence of weak satellite signals. The novel receiver is designed to detect, acquire, and track these weak signals, computing position solutions from calculated pseudo ranges despite the challenges of time synchronization. Key features of this invention include methods for calibrating a local oscillator, canceling cross correlations, implementing a Doppler location scheme, and utilizing an ensemble averaging scheme. Additionally, it incorporates the calculation of almanac aiding from a table of orbit coefficients, absolute time determination, and a modified search engine.

Career Highlights

Throughout his career, Dempster has worked with various companies, including Sigtec Navigation Pty Ltd and U-blox AG. His expertise in satellite navigation technology has positioned him as a leader in the field.

Collaborations

Dempster has collaborated with notable professionals such as Roderick C. Bryant and Stanley L. Dougan, contributing to advancements in satellite technology.

Conclusion

Andrew Graham Dempster's innovative work in satellite-based positioning systems showcases his dedication to enhancing location determination technology. His contributions continue to influence the field and pave the way for future advancements.