Product Specification DocumentsCollectionsSMAPDataset Id and VersionSPL4SMAU4SPL4SMAU5SPL4SMGP4SPL4SMLM4SPL4SMLM5SPL4SMGP5SPL4SMAU6SPL4SMGP6SPL4SMLM6SPL4SMAU/SMGP/SMLM Product Specification Document Version 2 [2018]Data Programnasa_nsidc_daac