1. RTCA DO-253B - Minimum Operational Performance Standards for GPS Local Area Augmentation System Airborne Equipment RTCA, Incorporated Washington D.C. 2007
2. Murphy , T. Harris , M. Park , Y. S. Pullen , S. GBAS Differentially Corrected Positioning Service Ionospheric Anomaly Errors Evaluated in an Operational Context Proceedings of the 2010 International Technical Meeting of The Institute of Navigation 2010 394 410