Accession Number:

AD0523014

Title:

Direct Ranging Loran. Volume I. Flight Test.

Descriptive Note:

Final rept. 30 Jun 70-1 Mar 72 on Phase 2,

Corporate Author:

TELEDYNE SYSTEMS CO NORTHRIDGE CALIF

Report Date:

1972-05-01

Pagination or Media Count:

298.0

Abstract:

A Direct Ranging LORAN Navigation System was constructed using a LORAN receiver, an interface unit, a digital computer and a controldisplay unit. The receiver and system output data were recorded by a digital magnetic recorder, together with time from a precision time code generator. The system was tested during 44 flights of three hours average duration during 1971 and 1972 at Eglin AFB. The C-131B test aircraft was beacon tracked by FPS-16 and MSQ-77 radars on the Eglin test ranges and used a stabilized downward-looking camera for off-range flights. The system data and radar position data were synchronized by 150-millisecond radio tones to permit post-flight evaluation of the system performance. The system digital computer performed real-time direct ranging navigation by implementing partitioned Kalman filters developed by Teledyne Systems. No velocity-aiding was used. A temperature-controlled crystal oscillator was used as the receiver oscillator. A simplified program DRL-1 and a more complex, fully modeled program DRL-2 were tested, along with a hyperbolic program operated in parallel for comparison.

Subject Categories:

  • Computer Programming and Software
  • Computer Hardware

Distribution Statement:

APPROVED FOR PUBLIC RELEASE