Process noise models In many estimation problems there are parameters that need to be estimated but whose values are not fixed (ie. they themselves are random processes in some way) EXamples include for GPS Clock behavior in the receivers and satellites Atmospheric delay parameters Earth orientation parameters Station position behavior after earthquakes 03/1802 12.540Lec1203/18/02 12.540 Lec 12 9 Process noise models • In many estimation problems there are parameters that need to be estimated but whose values are not fixed (ie., they themselves are random processes in some way) • Examples include for GPS – Clock behavior in the receivers and satellites – Atmospheric delay parameters – Earth orientation parameters – Station position behavior after earthquakes