Topic
VORTAC
About: VORTAC is a research topic. Over the lifetime, 28 publications have been published within this topic receiving 193 citations.
Papers
TL;DR: The author will describe the Federal Radionavigation Plan which delineates policies and plans for Government-provided radionavigate services, and provides a management structure by which the operating agencies will define requirements and meet them in a cost-effective manner.
Abstract: The author will describe the Federal Radionavigation Plan which delineates policies and plans for Government-provided radionavigation services. The plan gives respective areas of authority and responsibility and provides a management structure by which the operating agencies will define requirements and meet them in a cost-effective manner. It replaces the DOT National Plan for Navigation, and those sections of the DOD Joint Chiefs of Staff (JCS) Master Navigation Plan dealing with common-user systems.
The Plan covers Federally-operated systems having a high degree of common use (either military/civil or between the various transportation modes). The systems considered are: LORAN-A; LORAN-C; OMEGA; VOR; VOR/DME; VORTAC; TACAN; ILS; TRANSIT; RADIOBEACONS; MLS; and NAVSTAR GPS. The goal is to select a suitable mix of these systems which can meet diverse user requirements for accuracy, reliability, coverage, operational utility, and cost; provide adequate capability for future growth; and minimize duplication of services. However, selection of an optimum mix to satisfy the users, while holding the number of systems and government and user costs to a minimum, involves complex operational, technical, institutional, international and economic trade offs. This Plan establishes a methodology for DOT and DOD to address these questions and arrived at an initial, optimum mix determination in the mid-80's.
62 citations
Patent•
6 Nov 1972
TL;DR: In this article, the bearing, range and altitude of an aircraft are transmitted as a position location message to other aircraft, and a safety envelope surrounding the aircraft is selected and comprises the differential parameters of range, bearing and altitude comparison.
Abstract: In one exemplar embodiment, apparatus for providing an aircraft collision warning is disclosed. Means are provided for measuring the range and bearing of an aircraft from a ground control VORTAC station. An altimeter is provided to measure altitude. The bearing, range and altitude are encoded and transmitted as a position location message to other aircraft. The bearing information is transmitted as a function of the VOR signal and the transmission is synchronized to the VOR signal. Such position location messages are received by the receiving aircraft and decoded to obtain the bearing, range and altitude of other aircraft. A safety envelope surrounding the aircraft is selected by means provided and comprises the differential parameters of range, bearing and altitude comparison. Means are provided to compare the range, bearing and altitude of other aircraft with the differential parameters of the safety envelope, and if the range, bearing and altitude of the other aircraft are within the safety envelope selected, then means are provided for visually and audibly warning the receiving aircraft pilot. Additionally, the apparatus may comprise visual display means to visually display the other aircraft with respect to the receiving aircraft or both aircraft with respect to the ground VORTAC station.
24 citations
Patent•
26 Apr 1972
TL;DR: In this paper, a time-sharing cyclic time slot system in which DME range measuring functions, collision avoidance functions, clock synchronization functions and data telemetry functions are all combined into an integrated repeating time sharing cycle in a noninterfering manner to achieve either general navigation and traffic control, or else stationkeeping, by the orderly exchange of pulse signals between participating ground stations and/or aircraft.
Abstract: A time-sharing cyclic time slot system in which DME range measuring functions, collision avoidance functions, clock synchronization functions and/or data telemetry functions are all combined into an integrated repeating time sharing cycle in a non-interfering manner to achieve either general navigation and traffic control, or else stationkeeping, by the orderly exchange of pulse signals between participating ground stations and/or aircraft, and in which the cost of the system is minimized by using already existing ground and/or airborne VORTAC/TACAN/VOR/DME equipment and tuning the airborne transmitters and receivers in an agile manner to the various frequencies assigned for the performance of the above functions.
24 citations
Patent•
7 May 1973
TL;DR: In this article, an agile airborne DME unit is switched in a rapid manner to interrogate multiple ground stations successively and measure ranges thereto, the number of ground stations interrogated exceeding the minimum number required to provide a location.
Abstract: A system for using ranges measured from aircraft to multiple ground stations of the TACAN, VORTAC, VOR/DME, or DME type wherein only the distance measuring features of the ground and airborne units are used to determine location of the aircraft to a high degree of accuracy far exceeding the normal capability of this type of equipment, the present system using an agile airborne DME unit which is switched in a rapid manner to interrogate said multiple ground stations successively and measure ranges thereto, the number of ground stations interrogated exceeding the minimum number required to provide a location, and a computer then processing this redundancy of range measurements by employing error factors for the measured ranges, which error factors are used in iterative computations to converge the apparent locations of the aircraft upon the actual locations.
22 citations
Patent•
27 Mar 1967
TL;DR: In this article, a position finding system for radio navigational aid stations is described, identifying data from one station is received, and the received data is compared with the stored data until a match is found.
Abstract: 1,218,607. Radio navigation. HUGHES AIRCRAFT CO. 15 Feb., 1968 [27 March, 1967], No. 7563/68. Heading H4D. In a position finding system, identifying data of radio navigational aid stations is stored, identifying data from one station is received, and the received data is compared with the stored data until a match is found. General, Fig. 1.-An aircraft 12 carries sensors 20 and a digital computer 18, the radio aid stations e.g. 16 are identified by digitized frequency #i and an air traffic control centre 14 receives reports from the aircraft and issues commands c after every nth dead reckoning cycle the dead reckoning position data is corrected (##, #A) utilizing latitude # st and longitude Ast data relative to station 16. Calculated navigational information is fed to a display 22, the aircraft's position relative to a display map being always indicated. An automatic pilot may be controlled. Before measured VORTAC information can be utilized identification is established by a digital circuit.
11 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2010 | 1 |
| 2000 | 1 |
| 1994 | 1 |
| 1992 | 1 |
| 1990 | 1 |
| 1982 | 2 |