Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 154
Book Description
Investigation Into the Propagation of Omega Very Low Frequency Signals and Techniques for Improvement of Navigation Accuracy Including Differential and Composite Omega
Author: Scientific and Technical Aerospace Reports
Author: Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 960
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Continued Investigation of Potential Application of Omega Navigation to Civil Aviation
Author: Government Reports Announcements
Author: Implementation of an Experimental Program to Investigate the Performance Characteristics of OMEGA Navigation
Author: A Study of Signal to Noise Ratio, Lane Counting, and Position Accuracy Using the Omega Navigation System
Author: Glen Leif FranciscoPublisher:
ISBN:
Category : Aids to air navigation
Languages : en
Pages : 164
Book Description
A forty-hour flight program was completed to study signal to noise ratio, lane counting and position accuracy using a low cost Omega navigation system in a general aviation aircraft. Specific test objectives were developed to investigate signals both on the bench and in the air. Signal to noise ratio and lane counting characteristics were investigated in a single frequency, uncorrected mode and in a pseudo-differential mode. It was learned that the received signal to noise ratio is highly correlated with lane counting characteristics and receiver navigability. The relationship between system accuracy and reliability was also examined. The Omega navigation system's bias and position accuracy were investigated with the aid of the Discrete Address Beacon System (DABS). A circular probable error of 3500 feet was observed. It was also determined that certain necessary hardware and system improvements must be implemented before a completely usable Omega navigation system can be offered to the general aviation user.
Rendezvous Accuracy of the Omega Navigation System
Author: J. W. BrogdenPublisher:
ISBN:
Category :
Languages : en
Pages : 17
Book Description
Omega is a long-range, very-low-frequency radionavigation system with capabilities of providing a fix with an uncertainty of one mile or less at ranges of 5000 miles from the transmitting stations. The variations in propagation velocities of the signals over a particular path are the major cause of the errors. If the system is used as a rendezvous aid, the propagation errors will cancel out. Thus, the rendezvous accuracy will be greater than the absolute accuracy. The object of this investigation was to determine the rendezvous accuracy of a helicopter and a truck in various surroundings by use of Omega. The Forestport-Summit transmissions demonstrate that the system could be used as a rendezvous aid with accuracies of around 200 yards, with the time of day or environment having no apparent effect on the rendezvous errors. The Haiku-Summit pair showed a greater variation in rendezvous error. In past experiences with the Mark I receiver if the automatic gain control (AGC) meter indicated more than 40 microamperes, the signal input amplitude was marginal. During this experiment the majority of the AGC readings were above this value for receptions from Haiku. The additional electrical noise in the helicopter and an inadequate antenna combined with the already weak Haiku signal aided in making the Haiku-Summit readings marginal. (Author).
Proceedings of the First Omega Symposium
Author: Publisher:
ISBN:
Category : Electronics in navigation
Languages : en
Pages : 270
Book Description
Government Reports Announcements & Index
Author: Propagation Limitations of Navigation and Positioning Systems
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and DevelopmentPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 364
Book Description