Patent ID: 7423582

Claim:
A method for determining a predicted performance of a navigation augmentation system, comprising: determining a normal performance of the navigation augmentation system by generating normal integrity values indicative of the normal performance over a first time interval in the past; comparing current integrity values with the normal integrity values and updating the normal integrity values to account for differences between the normal integrity values and the current integrity values that are consistently repeated; and determining predicted integrity values indicating a future performance of the navigation augmentation system over a second time interval in the future by comparing the normal integrity values with the current integrity values to determine if a deviation exists and if a deviation does not exist using the normal integrity values to determine the predicted integrity values and if the deviation does exist determining the predicted integrity values based on a deviation, the first time interval being a longer time interval than the second time interval, wherein determining the predicted integrity values based on the deviation comprises predicting a likely progression of the deviation by matching characteristics of the deviation against a set of known deviation patterns.