undef

s1a-iw-grd-hh-20140613t180355-20140613t180424-001035-001019-001_filter

s1a-iw-grd-hv-20140613t180355-20140613t180424-001035-001019-002_filter

s1a-iw-grd-hv-20140613t180355-20140613t180424-001035-001019-002_winddir

s1a-iw-grd-hh-20140613t180355-20140613t180424-001035-001019-001_winddir