• Characterization of Tape Recorder Flutter in an Airborne Environment

      Rieger, James L.; Naval Weapons Center (International Foundation for Telemetering, 1977-10)
      While many methods are known for measurement of tape recorder flutter, most are intended for a laboratory environment, or at worst for situations where environment is under positive control. When the tape recorder is placed in a dynamic environment which is the source of the data to be recorded, tape flutter has a significant effect on the data accuracy. This paper describes some of the consequences of such flutter, and a method for separating the effects of flutter in the recording process from those encountered in playback; such information is required for the characterization of airborne tape recorders and for validation of data obtained.
    • Encoding of Telemetry Data in a Standard Video Channel

      Rieger, James L.; Naval Weapons Center (International Foundation for Telemetering, 1977-10)
      Various methods for compressing of a television image to fit a channel of reduced bandwidth are available; most are difficult and/or expensive to use, and many degrade the resulting picture appreciably. This paper describes an alternative method of placing the signals which accompany the picture within the passband of a picture, and separating them again at the receiving end with minimum crosstalk and picture degradation.