undef

s1a-ew-grd-vh-20160902t083002-20160902t083102-012871-014532-002_filter

s1a-ew-grd-vv-20160902t083002-20160902t083102-012871-014532-001_filter

s1a-ew-grd-vh-20160902t083002-20160902t083102-012871-014532-002_winddir

s1a-ew-grd-vv-20160902t083002-20160902t083102-012871-014532-001_winddir