undef

s1a-ew-grd-hh-20150708t101101-20150708t101128-006718-008fe6-001_filter

s1a-ew-grd-hv-20150708t101101-20150708t101128-006718-008fe6-002_filter

s1a-ew-grd-hv-20150708t101101-20150708t101128-006718-008fe6-002_winddir

s1a-ew-grd-hh-20150708t101101-20150708t101128-006718-008fe6-001_winddir