undef

s1a-ew-grd-hv-20151027t135147-20151027t135247-008339-00bc44-002_filter

s1a-ew-grd-hh-20151027t135147-20151027t135247-008339-00bc44-001_filter

s1a-ew-grd-hv-20151027t135147-20151027t135247-008339-00bc44-002_winddir

s1a-ew-grd-hh-20151027t135147-20151027t135247-008339-00bc44-001_winddir