Analytical Investigation of Time Correction in Alpha-Beta Tracking Filters with Application to En Route Tracking

Details

• Creators:
  Lefferts, Robert E.
• Corporate Creators:
  Federal Aviation Administration Technical Center (U.S.)
• Subject/TRT Terms:
  Air Traffic Control Alpha-Beta Filters Control Systems Digital Filtering Radar Tracking Tracking Systems
• Publication/ Report Number:
  FAA-CT-80-4
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Final Report
• Corporate Publisher:
  United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center
• Abstract:
  In the analysis of the a-a tracking filter, it 1s normally assumed that the tracking filter and data source operate in synchronism at a constant data rate. An analytical solution is obtained for the case in which the tracking filter and data source operate asynchronously, thus violating the standard assumptions. To compensate for the asynchronous operation of the filter, the technique of time correction is used to adjust the measured data point v1a the estimated velocity which approximates the synchronous operation of the filter and data source. The tracking filter performance 1n the steady-state case where time correction 1s used 1s better than that obtained from a fixed-parameter tracking filter 1n which the actual random time intervals between measurements are used as the temporal basis of filter operation. To ensure no degradation 1n system performance for purposes of air traffic control, a system timing accuracy on the order of 0.05 second 1s required to preserve the position measurement accuracy rather than the presently used technique which yields a timing accuracy on the order of 0.8 second. If the specified level of timing accuracy 1s not achieved, then it's postulated that significant errors will be introduced 1n the predicted position for maneuvering targets. System timing errors are presently the limiting factor in providing accurate position measurements for en route purposes and will partially nullify the data accuracy which will be available in the future.
• Format:
  PDF
• Funding:
  975-200-10A
• Collection(s):
  FAA William J. Hughes Technical Center for Advanced Aerospace
• Main Document Checksum:
  urn:sha-512:eff53afce9a38bdbc7e1f86aec9ed386ce3b6d535bd899437c1a0816d0a21779b5a172740cc24d26013af181a38cf7f6c7807f389cec9b0ce88249c4cdf3af1c
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/90543/dot_90543_DS1.pdf
• File Type:
  [PDF - 1.12 MB ]