We provide this processed DEM (Digital Elevation Model) for the AFRL GOTCHA GMTI challenge  based on the raw data from the USGS (United States Geological Survey) seamless dataset . The processed .mat file contains a 4000*3000 matrix (-500~500 meters in the x direction and -1000~1000 meters in the y direction). If you are using this DEM in your published research work, please include explicit mention of our work  in your publication.
 S. M. Scarborough, C. H. Casteel, Jr., L. Gorham, M. J. Minardi, U. K. Majumder, M. G. Judge, E. Zelnio, M. Bryant, H. Nichols, and D. Page, “A challenge problem for SAR-based GMTI in urban environments,” Proc. SPIE, vol. 7337, pp. 73 370G–73 370G–10, 2009.
 ZONUMS, “USGS seamless elevation data sets,” NASA EOSDIS Land Processes DAAC, USGS Earth Resources Observation and Science (EROS) Center, Sioux Falls, South Dakota, 2010.
 D. Wu, M. Yaghoobi, and M. Davies, “Digital elevation model aided SAR-based GMTI processing in urban environments,” in Sensor Signal Processing for Defence (SSPD), 2016, Sept 2016, pp. 1–5.