• Launch Vehicle and Satellite Independent Failure Analysis Using Telemetry Prognostic Algorithms

      Losik, Len; Failure Analysis (International Foundation for Telemetering, 2008-10)
      Unique vehicle designs encourage the use of the builder to complete its own failure analysis. Current failure analysis practices use telemetry and diagnostic technology developed over the past 100 years to identify root-cause. When telemetry isn't available speculation is used to create a list of prioritized, potential causes. Prognostic technology consists of generic algorithms that identify equipment that has failed and is going to fail while the equipment is still at the factory allowing the equipment to be repaired or replaced while it is still on the ground for any spacecraft, satellite, launch vehicle and missile.
    • Predicting Long-Term Telemetry Behavior for Lunar Orbiting, Deep Space, Planetary and Earth Orbiting Satellites

      Losik, Len; Failure Analysis (International Foundation for Telemetering, 2008-10)
      Providing normal telemetry behavior predictions prior to and post launch will help to stop surprise catastrophic satellite and spacecraft equipment failures. In-orbit spacecraft fail from surprise equipment failures that can result from not having normal telemetry behavior available for comparison with actual behavior catching satellite engineers by surprise. Some surprise equipment failures lead to the total loss of the satellite or spacecraft. Some recovery actions as a consequence of a surprise equipment failure are high risk and involve decisions requiring a level of experience far beyond the responsible engineers.
    • Spectral Analysis for Spacecraft Analog Telemetry Behavior

      Losik, Len; Failure Analysis (International Foundation for Telemetering, 2008-10)
      Spectral analysis decomposes a signal into its frequency components. Engineers can use spectral analysis to decompose Satellite and spacecraft telemetry behavior from space to provide a new tool to advance space vehicle reliability. The same tools used by RF and digital signal design engineers for identify signal integrity offers new understanding for telemetry behavior from space. Analysis illustrates the harmonic properties of telemetry behavior as a function of time, amplitude, frequency and phase. Expanding spectral analysis to satellites and spacecraft illustrates their fundamental harmonic properties. This information can be used to improve vehicle reliability and define vehicle and ground station telemetry system design performance parameters and reduce risk of catastrophic satellite and spacecraft failure.