The very large 20110223 Antarctic pair (250k pixels in height I think) has a couple of problems:
Uses a lot of memory in filtering.
D_sub has some artifacts.
Warning: Cached object (64000) larger than requested maximum cache size (4096000000). Current size =
Filesize for the output F.tif file is 24 GB. vwrc was:
write_pool_size = 200
system_cache_size = 4096000000
default_num_threads = 8