• UNIX and Real-Time Telemetry

      Querido, Robert; Loral Instrumentation (International Foundation for Telemetering, 1990-11)
      This paper discusses the benefits of using UNIX in a telemetry and satellite control product and some specific features implemented in UNIX-based workstations and file servers. Features discussed include real-time disk archiving and playback using UNIX and single-point-of-failure issues.
    • The Unix Operating System for Telemetry Applications

      Pfeiffer, Joseph J., Jr.; New Mexico State University (International Foundation for Telemetering, 1990-11)
      UNIX† is a very popular operating system, in use on a wide variety of hardware platforms, in a wide variety of environments, for a wide variety of problems. It has certain well-known deficiencies, however, for time-critical applications where guaranteed response time is required. This paper considers the use of Unix and related systems for telemetry applications. Of particular interest will be Unix as a possible operating system for NASA’s Data Handling Service.
    • USING THE FFT FOR DSP SPECTRUM ANALYSIS: A TELEMETRY ENGINEERING APPROACH

      Rosenthal, Glenn; Salley, Thomas; Metraplex Corporation (International Foundation for Telemetering, 1990-11)
      The Fast Fourier Transform (FFT) converts digitally sampled time domain data into the frequency domain. This paper will provide an advanced introduction for the telemetry engineer to basic FFT theory and then present and explain the different user preprocessing options that are available when using the FFT. These options include: using windowing functions, “zero filling” for frequency data interpolation, and setting the frequency resolution of the FFT resultant spectrum,