undef

s1a-iw-grd-vh-20160313t175005-20160313t175030-010354-00f569-002_filter

s1a-iw-grd-vv-20160313t175005-20160313t175030-010354-00f569-001_filter

s1a-iw-grd-vv-20160313t175005-20160313t175030-010354-00f569-001_winddir

s1a-iw-grd-vh-20160313t175005-20160313t175030-010354-00f569-002_winddir