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  • 1
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    Enhanced character sizes for the VDM-1 video display board (1983)
    In:  CASI
    Details
    Publication Date: 2006-04-03
    Description: Use of a microprocessor for providing navigation information from the inherent hyperbolic geometries of Loran-C was discussed. The advantages Loran-C offers over VOR/DME as a primary navigation aid are identified. These advantages include long range coverage by several stations, coverage at low altitudes, and the capability to have nonprecision approaches at airports not already served by landing aids. Modern digital electronic technology is used to produce a device to convert Loran-C data to useful pilot information using simple software algorithms and low cost microprocessor devices. The cost and lack of availability of suitable processors to execute these algorithms have prevented a Loran-C navigator from being developed. Results indicate that the microprocessor based Loran-C navigator has an accuracy of 1.0 nm or less over an area typically covered by a triad of Loran-C stations and can execute a position update in less than 0.2 seconds.
    Keywords: AIRCRAFT INSTRUMENTATION
    Type: NASA. Langley Research Center Joint Univ. Program for Air Transportation Res.; p 9-22
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Weather data communication and utilization (1983)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The communication of weather data to aircraft is discussed. Problems encountered because of the great quantities of data available and the limited capacity to transfer this via radio link to an aircraft are discussed. Display devices are discussed.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA. Langley Research Center Controls, Displays and Inform. Transfer for Gen. Aviation IFR Operations; p 201-210
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Loran-C digital word generator for use with a KIM-1 microprocessor system (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The problem of translating the time of occurrence of received Loran-C pulses into a time, referenced to a particular period of occurrence is addressed and applied to the design of a digital word generator for a Loran-C sensor processor package. The digital information from this word generator is processed in a KIM-1 microprocessor system which is based on the MOS 6502 CPU. This final system will consist of a complete time difference sensor processor for determining position information using Loran-C charts. The system consists of the KIM-1 microprocessor module, a 4K RAM memory board, a user interface, and the Loran-C word generator.
    Keywords: AIRCRAFT COMMUNICATIONS AND NAVIGATION
    Type: NASA-CR-155304 , TM-54
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Initial flight test of a Loran-C receiver/data collection system (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Development of a low cost Loran C receiver for general aviation use is discussed. The preparation and procedure of a flight test conducted with a receiver design which utilizes a phase locked loop oscillator to track the Loran C signals is described. It is indicated that such a receiver is a viable alternative for future work in developing a low cost Loran-C navigator.
    Keywords: AIRCRAFT COMMUNICATIONS AND NAVIGATION
    Type: NASA-CR-157629 , TM-64
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Cockpit weather radar display demonstrator and ground-to-air sferics telemetry system (1982)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The results of two methods of obtaining timely and accurate severe weather presentations in the cockpit are detailed. The first method described is a course up display of uplinked weather radar data. This involves the construction of a demonstrator that will show the feasibility of producing a course up display in the cockpit of the NASA simulator at Langley. A set of software algorithms was designed that could easily be implemented, along with data tapes generated to provide the cockpit simulation. The second method described involves the uplinking of sferic data from a ground based 3M-Ryan Stormscope. The technique involves transfer of the data on the CRT of the Stormscope to a remote CRT. This sferic uplink and display could also be included in an implementation on the NASA cockpit simulator, allowing evaluation of pilot responses based on real Stormscope data.
    Keywords: AIRCRAFT INSTRUMENTATION
    Type: NASA-CR-169830 , NAS 1.26:169830 , OU/AEC-EER-53-5
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Loran-C flight test software (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The software package developed for the KIM-1 Micro-System and the Mini-L PLL receiver to simplify taking flight test data is described along with the address and data bus buffers used in the KIM-1 Micro-system. The interface hardware and timing are also presented to describe completely the software programs.
    Keywords: AIRCRAFT COMMUNICATIONS AND NAVIGATION
    Type: NASA-CR-157581 , TM-61
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Stand-alone development system using a KIM-1 microcomputer module (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A small microprocessor-based system designed to: contain all or most of the interface hardware, designed to be easy to access and modify the hardware, to be capable of being strapped to the seat of a small general aviation aircraft, and to be independent of the aircraft power system is described. The system is used to develop a low cost Loran C sensor processor, but is designed such that the Loran interface boards may be removed and other hardware interfaces inserted into the same connectors. This flexibility is achieved through memory-mapping techniques into the microprocessor.
    Keywords: AIRCRAFT COMMUNICATIONS AND NAVIGATION
    Type: NASA-CR-156067 , TM-56
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Enhanced character sizes for the VDM-1 video display board (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A display enhancement implemented on the new VDM-1 video display board installed in a LORAN-C navigation receiver is addressed. Increased character size for easier viewing of the 3.75 inch diagonal CRT display is provided.
    Keywords: AIRCRAFT COMMUNICATIONS AND NAVIGATION
    Type: NASA-CR-169692 , NAS 1.26:169692 , TM-83
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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