undef

s1b-iw-grd-vh-20171028t092831-20171028t092856-008028-00e2ed-002_filter

s1b-iw-grd-vv-20171028t092831-20171028t092856-008028-00e2ed-001_filter

s1b-iw-grd-vv-20171028t092831-20171028t092856-008028-00e2ed-001_winddir

s1b-iw-grd-vh-20171028t092831-20171028t092856-008028-00e2ed-002_winddir