ICESat-2
ICESat-2 , a follow-on to the ICESat mission , was launched on 15 September 2018 from Vandenberg Air Force Base in California , into a near-circular , near-polar orbit with an altitude of approximately . 
<triplet> ICESat-2 <subj> ICESat <obj> follows <triplet> ICESat <subj> ICESat-2 <obj> followed by