undef

s1a-iw-grd-vh-20160226t100113-20160226t100138-010116-00ee9e-002_filter

s1a-iw-grd-vv-20160226t100113-20160226t100138-010116-00ee9e-001_filter

s1a-iw-grd-vv-20160226t100113-20160226t100138-010116-00ee9e-001_winddir

s1a-iw-grd-vh-20160226t100113-20160226t100138-010116-00ee9e-002_winddir