The payload is suspended by the launch crane while the 39mcf balloon is being inflated with helium. All four balloon flights were successful and provided clean data for analysis. Schematic Drawings of the instruments. Scintillator T6 also assists in particle identification and energy determination by counting the number of particles that escape the calorimeter.
Open symbols represent electron data and solid symbols represent helium data.
Also shown is the solar magnetic polarity state and the symbols N and S signify the time these polar regions change polarity state. Open up-right triangles represent observations made by the LEE instrument. Compiled measurements and calculations of the positron fraction as a function of energy during different epochs of solar magnetic polarity. Open symbols and lower dashed line represent A- state. Latest preprint of measurements and analysis is available as a pdf file.