This page explains how Cory Eider (USATT# 62727)'s rating went from 2190 to 2172 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.