Accession Number:

AD0729358

Title:

All-Weather, Low-Level Navigation.

Descriptive Note:

Semi-annual rept. no. 3, Oct 70-Apr 71.

Corporate Author:

OHIO UNIV ATHENS DEPT OF ELECTRICAL ENGINEERING

Personal Author(s):

Report Date:

1971-08-01

Pagination or Media Count:

57.0

Abstract:

During this reporting period a second Rubidium clock stabilized low-frequency transmitting station was mechanized with a phase-locked loop synthesizer to permit a flyable demonstration of a precision all-weather, low-level navigation system using passive, direct-ranging techniques. Phase measurements of the respective transmitter carriers are optimally obtained by means of two maximum likelihood receivers with an onboard clock. A General Automation SPC-12 digital computer provides coordinate conversion to an x-y position format, a route storage capability, and execution of a flight director algorithm. Extension and additions to the theoretical maximum likelihood receiver work provides a comprehensive comparison of this technique with the conversational phase-locked loop for phase estimation purposes. A special display-conventional terminal was designed and fabricated to provide a flexible and useful means of communicating with the SPC-12 computer both in the laboratory and during airborne exercises. Novel time and memory conserving computer software is also discussed. Author

Subject Categories:

  • Navigation and Guidance
  • Computer Hardware

Distribution Statement:

APPROVED FOR PUBLIC RELEASE