▁radiation ▁data ▁from ▁the ▁affected ▁areas . ▁R DT N ▁intended ▁their ▁independent ▁measurements ▁to ▁provide ▁additional ▁context ▁for ▁the ▁radiation ▁data ▁reported ▁by ▁the ▁official ▁factors , ▁to ▁supp lement ▁and ▁not ▁to ▁replace ▁the ▁data ▁of ▁the ▁compet ent ▁authorities . ▁ ▁R DT N ▁successfully ▁launched ▁a ▁mic rop at ron age ▁campaign ▁to ▁raise ▁$ 3 3 , 0 0 0 ▁in ▁order ▁to ▁buy ▁ 1 0 0 ▁Ge iger ▁coun ters ▁to ▁jump start ▁their ▁network . ▁In ▁April ▁hack ers ▁at ▁to ky oh ack ers pace ▁pro tot yp ed ▁an ▁Ar duino - based ▁ge iger ▁counter ▁shield ▁to ▁upload ▁data ▁from ▁ge iger ▁coun ters ▁including ▁from ▁R DT N ▁supplied ▁coun ters . ▁This ▁prototype ▁later ▁developed ▁into ▁Saf ec ast ▁mobile ▁ge o - tag ged ▁radiation ▁sens ors . ▁ ▁R DT N ▁people ▁attributed ▁their ▁success ▁to ▁crisis ▁ur gency . ▁ ▁In ▁late ▁April , ▁one ▁month ▁after ▁its ▁start , ▁R DT N ▁fol ded ▁itself ▁into ▁Saf ec ast ▁with ▁the ▁joint ▁announ cement ▁that ▁R DT N ▁was ▁re brand ed ▁as ▁Saf ec ast , ▁a ▁citizens ' ▁network ▁which ▁continues ▁monitoring ▁radiation ▁levels ▁in ▁Japan . ▁ ▁References ▁ ▁External ▁links ▁S PE ED I ▁English ▁website ▁I sh ik awa ▁Lab ▁Ge iger ▁counter ▁page ▁P ach ube ▁streams ▁reporting ▁radiation ▁read ings ▁The ▁Situ ation ▁in ▁Japan , ▁Energy ▁B log , ▁De pt ▁of ▁Energy ▁Mon itor ing ▁of ▁