User GuideDataset Id and VersionGLAH0133GLAH0533GLAH0633GLAH1233GLAH1333GLAH1433GLAH1533GLAH0134GLAH0534GLAH0634GLAH1234GLAH1334GLAH1434GLAH1534GLAS/ICESat L1 and L2 Global Altimetry Data (HDF5), Version 33, 34 User GuideData Programnasa_nsidc_daac