Here are some other new GPR images that might be of interest
Historic site in Maryland showing a slice map of the material in the old cellar (see Conyers 2012 book, page 111):
Analysis of profiles over graves showing the analysis that can be performed to determine if the caskets contain voids spaces or not (see Conyers 2012 book, page 134):
Amplitude maps of kivas in the American Southwest (see Conyers 2012 book, page 186)
Reflection profile of sand dunes and cultural materials from Coastal Brazil (see Conyers 2015 book)