The Hatch filter, the industry-standard method for smoothing GPS code measurements with carrier data in the local area augmented system (LAAS), is susceptible to divergence errors during severe ionospheric storms. The work presented here develops an alternate single-frequency filter called a nonlinear divergence elimination (NLDE) filter that mitigates divergence errors without increasing measurement noise. Application of the filter to GPS data indicates that the nonlinear filter not only zeroes steady-state divergence but also reduces maximum transient errors by 0-24% relative to the Hatch filter.
Nonlinear Filter for Ionosphere Divergence Error Reduction in LAAS
IEEE Transactions on Aerospace and Electronic Systems ; 48 , 2 ; 981-990
2012-04-01
1610388 byte
Article (Journal)
Electronic Resource
English
LIMITS OF LINEAR, SINGLE-FREQUENCY FILTER DESIGN FOR MINIMIZING IONOSPHERE DIVERGENCE ERROR
Online Contents | 2009
|LIMITS OF LINEAR, SINGLE-FREQUENCY FILTER DESIGN FOR MINIMIZING IONOSPHERE DIVERGENCE ERROR
British Library Online Contents | 2009
|Paired Overbounding for Nonideal LAAS and WAAS Error Distributions
Online Contents | 2006
|LAAS Ground Equipment Availability
British Library Conference Proceedings | 1997
|Validation of the FAA LAAS Specification Using the LAAS Test Prototype (LTP)
British Library Conference Proceedings | 1998
|