Radiosonde measurements from station Boulder, SURFRAD (2009-10)

Start location: Denver, CO; Distance from radiation site: 40 km; If launch time is exactly 00Z or 12Z, the actual launch time is likely unknown发射起始地点：美国科罗拉多州丹佛市；与辐射源的距离：40千米；若发射时刻恰好为00Z或12Z，则实际发射时刻大概率未知。