undef

s1a-iw-grd-vh-20150422t215216-20150422t215250-005602-0072c2-002_filter

s1a-iw-grd-vv-20150422t215216-20150422t215250-005602-0072c2-001_filter

s1a-iw-grd-vh-20150422t215216-20150422t215250-005602-0072c2-002_winddir

s1a-iw-grd-vv-20150422t215216-20150422t215250-005602-0072c2-001_winddir