1. Datta-Barua , S. T. Walter S. Pullen M. Luo J. Blanch P. Enge 2002 Using WAAS ionospheric data to estimate LAAS short baseline gradients
2. Ionospheric threat parameterization for local area global-positioning-system-based aircraft landing system;Datta-Barua;AIAA Aircraft J.,2010
3. Ene , A. D. Qiu M. Luo S. Pullen P. Enge 2005 A comprehensive ionosphere storm data analysis method to support LAAS threat model development
4. Clustering and the continuous k-means algorithm;Faber;Los Alamos Science,1994
5. Long-term ionospheric anomaly monitoring for ground based augmentation systems;Jung;Radio Sci.,2012