hour ▁demonstr ation ▁mission ▁( ST P - 2 ) ▁of ▁the ▁Fal con ▁ 9 ▁second ▁stage ▁for ▁the ▁US ▁Air ▁Force ▁in ▁ 2 0 1 9 , ▁but ▁did ▁not ▁define ▁what ▁all ▁that ▁term ▁en comp ass ed . ▁ ▁When ▁originally ▁proposed ▁in ▁ 2 0 1 5 , ▁the ▁One Web ▁const ell ation , ▁initially ▁planned ▁to ▁have ▁~ 7 0 0 ▁sat ell ites ▁anticip ated ▁on ▁orbit ▁after ▁ 2 0 1 8 , ▁would ▁only ▁state ▁that ▁they ▁would ▁re - enter ▁the ▁atmosphere ▁within ▁ 2 5 ▁years ▁of ▁ret irement , ▁which ▁would ▁comp ly ▁with ▁the ▁Or b ital ▁Deb ris ▁Mit ig ation ▁Standard ▁Pract ices ▁( OD MS P ) ▁issued ▁by ▁the ▁US ▁government ▁in ▁ 2 0 0 1 . ▁By ▁October ▁ 2 0 1 7 , ▁both ▁One Web — and ▁also ▁Space X , ▁with ▁their ▁large ▁Star link ▁const ell ation — had ▁file d ▁documents ▁with ▁the ▁US ▁F CC ▁with ▁more ▁ag gress ive ▁space ▁de br is ▁mit ig ation ▁plans . ▁Both ▁companies ▁committed ▁to ▁a ▁de or bit ▁plan ▁for ▁post - mission ▁sat ell ites ▁which ▁will ▁explicitly ▁move ▁the ▁sat ell ites ▁into ▁or bits ▁where ▁they ▁will ▁re enter ▁the ▁Earth ' s ▁atmosphere ▁within ▁approximately ▁one ▁year ▁following ▁end - of - life . ▁ ▁With ▁a ▁" one - up , ▁one - down " ▁launch - lic ense ▁policy ▁for ▁Earth