undef

s1a-iw-grd-vh-20170624t175015-20170624t175040-017179-01ca69-002_filter

s1a-iw-grd-vv-20170624t175015-20170624t175040-017179-01ca69-001_filter

s1a-iw-grd-vv-20170624t175015-20170624t175040-017179-01ca69-001_winddir

s1a-iw-grd-vh-20170624t175015-20170624t175040-017179-01ca69-002_winddir