▁well ▁as ▁the ▁Rh ine - R u hr ▁S - B ahn . ▁ ▁Notes ▁ ▁External ▁links ▁▁ ▁Category : R ail way ▁stations ▁in ▁North ▁Rh ine - West phal ia ▁Category : S 2 ▁( R h ine - R u hr ▁S - B ahn ) ▁Category : R h ine - R u hr ▁S - B ahn ▁stations ▁Category : Build ings ▁and ▁structures ▁in ▁Her ne , ▁North ▁Rh ine - West phal ia ▁Category : R ail way ▁stations ▁opened ▁in ▁ 1 8 6 4 ▁Category : 1 8 6 4 ▁establish ments ▁in ▁Germany <0x0A> </s> ▁An ▁amateur ▁radio ▁satellite ▁is ▁an ▁artificial ▁satellite ▁built ▁and ▁used ▁by ▁amateur ▁radio ▁operators . ▁ ▁It ▁forms ▁part ▁of ▁the ▁Am ateur - s at ellite ▁service . ▁ ▁These ▁sat ell ites ▁use ▁amateur ▁radio ▁frequency ▁alloc ations ▁to ▁facil itate ▁communication ▁between ▁amateur ▁radio ▁stations . ▁ ▁Many ▁amateur ▁sat ell ites ▁receive ▁an ▁OS C AR ▁design ation , ▁which ▁is ▁an ▁ac ron ym ▁for ▁Or bit ing ▁Sat ellite ▁Car ry ing ▁Am ateur ▁Radio . ▁The ▁design ation ▁is ▁assigned ▁by ▁A MS AT , ▁an ▁organization ▁which ▁prom otes ▁the ▁development ▁and ▁launch ▁of ▁amateur ▁radio ▁sat ell ites . ▁ ▁Because ▁of ▁the ▁pre val ence ▁of ▁this ▁design ation , ▁amateur ▁radio ▁sat ell ites ▁are ▁often ▁referred ▁to ▁as ▁OS C AR s . ▁ ▁These ▁sat ell ites ▁can ▁be ▁used ▁free ▁of