Cosmic Electron and Positron Spectra Measured in 2002

In August of 2002 we successfully carried out two balloon flights, extending our series of measurements of the time evolution of the spectra of cosmic ray electrons and positrons up to 2.5 GeV. Our positron detector, AESOP, flew for over 40 hours on a conventional balloon. On another flight, the electron detector LEE reached an altitude of 161,000 feet on a newly designed NASA balloon, which was the largest balloon ever successfully launched. Both flights, from Lynn Lake, Manitoba, were technically successful. We will report the preliminary analysis (now in progress) of the data from these flights in a continuation of our efforts to understand the origin of charge sign dependent effects in solar modulation.

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