AGATHE

A 15 plate (1x1 mts) spark chamber triggered by a time of flight system between two plates of scinitllators 1.9 m apart

Balloon launched on: 2/7/1977 at 6:30
Launch site: Guaratinguetá Air Base, Sao Paulo, Brazil  
Balloon launched by: Centre National d'Etudes Spatiales (CNES)
Balloon manufacturer/size/composition: Zero Pressure Balloon model 350sf Zodiac - 350.000 m3
End of flight (L for landing time, W for last contact, otherwise termination time): 2/7/1977 at 13.40
Balloon flight duration (F: time at float only, otherwise total flight time in d:days / h:hours or m:minutes - ): 7 h
Landing site: In Umuarama, Paraná, Brazil

• A 1 m2 gamma ray spark chamber telescope for the energy range 10 - 100 MeV Nuclear Instruments and Methods, Vol. 148, p. 483
• Atmospheric gamma radiation: A comparison of experimental results at 4.5 GV and 11.7 GV J. Geophys. Res., 89(A7), 5636
• Detection of the positron annihilation gamma ray line from the Galactic Center region Astronomy and Astrophysics, vol. 94, no. 2, Feb. 1981, p. 214
• Measurements of Atmospheric and Diffuse Gamma Radiation with a Large Area Spark Chamber in the 6 MEV-100 Mev Region 17th International Cosmic Ray Conference, Volume 9., p.68
• Study of diffuse cosmic and atmospheric gamma radiation using a spark chamber in the energy range 4 MeV-100 MeV Astrophysical Journal, Part 1, vol. 261, Oct. 15, 1982, p. 720-731