undef

s1a-iw-grd-hh-20141104t172712-20141104t172731-003135-0039a8-001_filter

s1a-iw-grd-hv-20141104t172712-20141104t172731-003135-0039a8-002_filter

s1a-iw-grd-hh-20141104t172712-20141104t172731-003135-0039a8-001_winddir

s1a-iw-grd-hv-20141104t172712-20141104t172731-003135-0039a8-002_winddir