Degrees miles?

In 1963, Brown et al. reported in the Journal of Geophysical Research that Starfish Prime had created a belt of MeV electrons, and Bill Hess reported in 1968 that some Starfish electrons remained for five years. Others reported that radioactive particles from Starfish Prime descended to earth seasonally and accumulated in terrestrial organisms such as fungi and lichens. The Starfish bomb contained Cd-109 tracer which helped work out the seasonal mixing rate of polar and tropical air masses. The early data are reviewed at . The Starfish EMP waveform measured by Richard L. Wakefield of Los Alamos led to a revolution in understanding this nuclear effect and is now available at . Wakefield's 1962 report is Measurement of time interval from electromagnetic signal received in C-130 aircraft, 753 nautical miles from burst, at 11 degrees 16 minutes North, 115 degrees 7 minutes West, 24,750 feet.