undef

s1a-iw-grd-vv-20160722t155945-20160722t160014-012263-0130e8-001_filter

s1a-iw-grd-vh-20160722t155945-20160722t160014-012263-0130e8-002_filter

s1a-iw-grd-vh-20160722t155945-20160722t160014-012263-0130e8-002_winddir

s1a-iw-grd-vv-20160722t155945-20160722t160014-012263-0130e8-001_winddir