ALL-WEATHER, LOW-LEVEL NAVIGATION.
Semi-annual rept. no. 1, Oct 69-Apr 70.
OHIO UNIV ATHENS DEPT OF ELECTRICAL ENGINEERING
Pagination or Media Count:
The multifaceted work associated with the early phases of the Ohio University Themis project has gradually been consolidated into the broad areas of receiver and computer technology as applied to producing the All-Weather, Low-Level Navigation System. The design and breadboarding of a tuned radio frequency TRF receiver has been completed. Results of laboratory tests of the TRF breadboard indicate the receiver is phase-stable to within one electrical degree its design objective. Effort on the maximum likelihood estimator MLE has been divided into two efforts. First, verification of earlier theoretical investigation comparing phase-locked loop and MLE receiver structures was accomplished. Second, refinements in the physical realization of the MLE were achieved and a brassboard design frozen. The airborne reference frequency synthesizer has been designed and is being fabricated. In addition, precision stability measurements are being accomplished on a new crystal standard to ascertain its suitability for future airborne use. Work continues in the area of system integration and analysis, particularly in the application of Kalman filtering techniques for estimating position accurately and in the broad area of man-machine relationships required in the low-level, all-weather navigation system. Author
- Air Navigation and Guidance
- Commercial and General Aviation
- Computer Hardware