▁not ▁causing ▁harm ful ▁inter ference ▁to ▁other ▁services ▁operating ▁in ▁accord ance ▁with ▁the ▁Table ▁( see ▁No . ▁ 5 . 4 3 ). ▁Administr ations ▁author izing ▁such ▁use ▁shall ▁ensure ▁that ▁any ▁harm ful ▁inter ference ▁caused ▁by ▁em issions ▁from ▁a ▁station ▁in ▁the ▁amateur - s at ellite ▁service ▁is ▁immediately ▁elimin ated ▁ ▁in ▁accord ance ▁with ▁the ▁prov isions ▁of ▁No . ▁ 2 5 . 1 1 . ▁The ▁use ▁of ▁the ▁bands ▁ 1 ▁ 2 6 0 - 1 ▁ 2 7 0 ▁M Hz ▁and ▁ 5 ▁ 6 5 0 - 5 ▁ 6 7 0 ▁M Hz ▁by ▁the ▁amateur - s at ellite ▁service ▁is ▁limited ▁to ▁the ▁Earth - to - space ▁direction . ▁ ▁Of ▁these , ▁the ▁ 4 3 5 - 4 3 8   M Hz ▁band ▁is ▁particularly ▁popular ▁for ▁amateur / ed uc ational ▁small ▁sat ell ites ▁such ▁as ▁Cub es ats . ▁ ▁References ▁▁▁ ▁Martin ▁Dav ido ff : ▁The ▁Radio ▁Am ateur ' s ▁Sat ellite ▁Hand book . ▁The ▁American ▁Radio ▁Rel ay ▁League , ▁New ington , ▁. ▁ ▁Notes ▁ ▁External ▁links ▁▁ ▁A MS AT ▁Corporation ▁- ▁a ▁non pro fit ▁corpor ation ▁that ▁coordinates ▁construction ▁and ▁launch ▁of ▁amateur ▁radio ▁sat ell ites ▁Project ▁OS C AR ▁- ▁club ▁comm emor ating ▁the ▁original ▁Project ▁OS C AR ▁group ▁Work - S at ▁- ▁Private ▁site ▁with ▁instructions ▁for ▁using ▁amateur ▁radio