This page explains how Helen Hsu Leung (USATT# 16364)'s rating went from 972 to 960 at the Air Traffic Spring Open held on - 21 Mar 1999. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.