undef

s1a-ew-grd-hv-20171225t155041-20171225t155146-019861-021caa-002_filter

s1a-ew-grd-hh-20171225t155041-20171225t155146-019861-021caa-001_filter

s1a-ew-grd-hv-20171225t155041-20171225t155146-019861-021caa-002_winddir

s1a-ew-grd-hh-20171225t155041-20171225t155146-019861-021caa-001_winddir