Accession Number : ADA118899

Title :   An Improved Technique for Altitude Tracking of Aircraft.

Descriptive Note : Project rept.,


Personal Author(s) : Andrews,J W

PDF Url : ADA118899

Report Date : 25 Mar 1981

Pagination or Media Count : 62

Abstract : When simple linear recursive tracking techniques are applied to quantized altitude reports, certain errors in estimation of altitude and altitude rate can be attributed to the response of the tracker to transitions between quantization levels. These errors can be reduced by use of an estimation technique which explicitly recognizes the quantized nature of the inputs. Smoothing of the level occupancy time (i.e., the time spent at each quantization level) can be used to control the response to redundant samples taken at the same quantization level. Further improvement is achieved by consistency tests which use particular properties of quantized data to detect changes in rate. This document presents a theoretical analysis of tracker response to quantized inputs. A tracking algorithm is synthesized using these techniques and simulation results using various altitude profiles are presented. (Author)

Descriptors :   *Air traffic control systems, *Collision avoidance, *Mathematical models, Tracking, Algorithms, Recursive filters, Altitude, Rates, Flight paths, Radar tracking

Subject Categories : Terminal Flight Facilities
      Theoretical Mathematics
      Air Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE