31 Gregory Leptoukh Steve Kempler Peter Smith Andrey Savtchenko Robert Kummerer A. Galopan J. Farley Aijun Chen 2007 A-Train Data Depot: Integrating and Exploring Data along the A-Train Tracks IEEE International Geoscience and Remote Sensing Symposium Barcelona, Spain July 23-27 http://www.ieeexplore.ieee.org/xpl/freeabs_all.jsp?isnumber=4422708&arnumber=4422998&count=1360&index=289