* UAVSAR_Stack: bugfix for line/sample num and dopplerFile path
+ UAVSAR_Stack: use segment index while setting the number of lines / samples
+ UAVSAR_Stack: use self.dopplerFile if it exists otherwise use the path from *.ann file, to support unpackFrame_UAVSAR.py when dop file is not in the current directory
+ unpackFrame_UAVSAR: rename variables and comments to improve code readability
* use getattr() instead of hasattr()
Zhang Yunjun
Eric Gurrola