Direct Ranging Loran. Volume I. Flight Test.
Abstract
A Direct Ranging LORAN Navigation System was constructed using a LORAN receiver, an interface unit, a digital computer and a control/display 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1972
- Accession Number
- AD0523014
Entities
People
- Andrew M. Hautzik
- Calvin O. Culver
- John A. Dowell
Organizations
- Teledyne Technologies