Company Filing History:
Years Active: 1999-2004
Title: Innovations of Janet Brown Neumann
Introduction
Janet Brown Neumann is a prominent inventor based in Calgary, Canada. She has made significant contributions to the field of navigation technology, holding a total of 3 patents. Her work focuses on enhancing the accuracy and reliability of GPS and inertial navigation systems.
Latest Patents
One of her latest patents is an Inertial GPS navigation system. This innovative receiver utilizes a single processor to control both a GPS sub-system and an inertial navigation system (INS). Through software integration, it shares position and covariance information between the two sub-systems. The receiver time tags the INS measurement data using a counter synchronized to GPS time. It employs separate INS and GPS filters to produce synchronized position information. The GPS/INS receiver updates the INS Kalman filter with GPS position and covariance information, improving system error information for propagating inertial position, velocity, and attitude. Additionally, when stationary, the INS sub-system performs zero-velocity updates to compensate for measurement biases and noise. If GPS signals are lost, the receiver utilizes inertial data to expedite satellite signal re-acquisition.
Another notable patent is a method for reducing inter-frequency bias effects in a receiver. This calibration procedure addresses frequency-dependent bias effects in a fixed satellite-based ground-positioning receiver capable of receiving both GPS and GLONASS signals. The procedure removes satellite dynamics using ephemeris data and estimates changes in receiver clock offset through GPS measurements. It acquires multiple GLONASS pseudorange measurements while cycling through different frequencies.
Career Highlights
Janet is currently employed at Novatel Inc., where she continues to innovate in the field of navigation technology. Her work has significantly impacted the accuracy and efficiency of satellite-based positioning systems.
Collaborations
Some of her notable coworkers include Thomas John Ford and Ian Williamson. Their collaborative efforts contribute to the advancement of technology in their field.
Conclusion
Janet Brown Neumann's contributions to navigation technology through her patents demonstrate her expertise and commitment to innovation. Her work continues to influence the development of more reliable navigation systems.