• AN APPLICATION OF ETHERNET TECHNOLOGY AND PC TELEMETRY DATA PROCESSORS IN REAL-TIME RANGE SAFETY DECISION MAKING

      Johnson, Carl E.; NASA (International Foundation for Telemetering, 1992-10)
      The ethernet technology has vastly improved the capability to make real-time decisions during the flight of a vehicle. This asset combined with a PC telemetry data processor and the power of a high resolution graphics workstation, allows the decision makers to have a highly reliable graphical display of information on which to make vehicle related safety decisions in real-time.
    • Single Point User-Interface Software Design for Telemetry Stations

      Corbin, Brian A.; NASA (International Foundation for Telemetering, 1992-10)
      As the repetitive processes in the manufacturing community are being automated to reduce operating cost, the satellite tracking station (being for the most part a repetitive operation) can also reduce operating cost by automation. A conventional satellite tracking station requires personnel to setup, monitor, and adjust a variety of equipment, coordinate data collection, and archive collected data. By automating, the above duties in addition to managing the station can be done through a single-point user interface. This paper presents the methods used to design the user-interface software including graphical user interface (GUI) types of hardware I/O for data acquisition and control, and remote control.
    • VITERBI DECODER FOR NASA’S SPACE SHUTTLE’S TELEMETRY DATA

      Mayer, Robert; McDaniels, James; Kalil, Lou F.; Aydin Computer & Monitor Division; NASA (International Foundation for Telemetering, 1992-10)
      In the event of a NASA Space Shuttle mission landing at the While Sands Missile Range, White Sands, New Mexico, a data communications system for processing Shuttle’s telemetry data has been installed there in the Master Control Telemetry Station, JIG-56. This data system required a Viterbi decoder since the Shuttle’s data is convolutionally encoded. However, the Shuttle uses a nonstandard code, and the manufacturer which in the past has provided decoders for Shuttle support, no longer produces them. Since no other company produced a Viterbi decoder designed to decode the shuttle’s data, it was necessary to develop the required decoder. The purpose of this paper is to describe the functional performance requirements and design of this decoder.