undef

s1a-iw-grd-vv-20160812t100027-20160812t100056-012566-013afc-001_filter

s1a-iw-grd-vh-20160812t100027-20160812t100056-012566-013afc-002_filter

s1a-iw-grd-vh-20160812t100027-20160812t100056-012566-013afc-002_winddir

s1a-iw-grd-vv-20160812t100027-20160812t100056-012566-013afc-001_winddir