undef

s1a-iw-grd-vh-20170525t101644-20170525t101713-016737-01bcc3-002_filter

s1a-iw-grd-vv-20170525t101644-20170525t101713-016737-01bcc3-001_filter

s1a-iw-grd-vh-20170525t101644-20170525t101713-016737-01bcc3-002_winddir

s1a-iw-grd-vv-20170525t101644-20170525t101713-016737-01bcc3-001_winddir