https://n5eil01u.ecs.nsidc.org/DP4/SMAP/SPL3SMP.004/2017.04.01/SMAP_L3_SM_P_20170401_R14010_001.h5
https://n5eil01u.ecs.nsidc.org/DP4/SMAP/SPL3SMP.004/2017.04.03/SMAP_L3_SM_P_20170403_R14010_001.h5
https://n5eil01u.ecs.nsidc.org/DP4/SMAP/SPL3SMP.004/2017.04.06/SMAP_L3_SM_P_20170406_R14010_001.h5