Comparison of the Performance of Two Gust Front Detection Algorithms Using a Length-Based Scoring Technique.

摘要

The Terminal Doppler Weather Radar (TDWR) Gust Front Algorithm provides, as products, estimates of the current locations of gust fronts. their future locations, the wind speed and direction behind the gust fronts, and the wind shear hazard to landing or departing aircraft. These products are used by air traffic controllers and supervisors to warn pilots of potentially hazardous wind shears during take-off and landing and to plan runway reconfigurations. Until recently, an event-based scoring scheme was used to evaluate the performance of the algorithm. With the event-based scoring scheme, if any part of a gust front was detected, a valid detection was declared. Unfortunately, this scheme gave no indication of how much of the gust front length was detected; nor could the probabilities be easily related to the probability of issuing a wind shear alert for a specific approach or departure path which was being impacted by a gust front. To make the scoring metric more nearly reflect the operational use of the product, a new length-based scoring scheme was devised. This scheme computes the length of the gust front detected by the algorithm. When computed over a large number of gust fronts, this length-based scoring scheme yields the probability that any part of the gust front will be detected. Gust front, performance assessment, gust front algorithm, air traffic control, wind shear, Terminal Doppler Weather Radar.