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1 results

  • Quality Control in SBAS: Protection Levels and Reliability Levels

  • João Oliveira, Christian Tiberius
  • Journal:
    The Journal of Navigation / Volume 62 / Issue 3 / July 2009
    Published online by Cambridge University Press:
    15 June 2009, pp. 509-522
    Print publication:
    July 2009

  • This contribution extends the common documented approach of integrity through Protection Levels in Satellite-Based Augmentation System (SBAS) positioning for aeronautics, to reliability on the basis of statistical hypothesis testing, and as such provides a safeguard against model misspecifications as anomalies and outliers in the measurements. It is shown that when integrity is monitored through Protection Levels and reliability added through Reliability Levels, the availability of the SBAS position solution is more than 99% for APV-I precision approach. The availability for CAT-I is currently just a few percent. When the Galileo constellation is added, and current performance is copied ahead, the percentage for CAT-I increases to beyond 95%.