EMULSION BLOCK

The objective of the flight was to expose for several hours above 120.000 feet in the stratosphere an emulsion stack to measure the flux of primary cosmic-ray heavy nuclei. The balloon mission was planned to be carried out approximately 2 years after the solar maximum and well within the period of minimum cosmic ray activity.

The emulsion stack flown in this experiment consisted of 14 type-G.5 Ilford stripped emulsions measuring 8 by 8 inches, 400 microns thick, alternated with 13 type-C.2 emulsions, 200 microns thick. The plane of the emulsions was maintained vertical in a masonite and cardboard container with wall thickness of 0.38 g/cm.

Balloon launched on: 5/25/1960
Launch site: Naval Air Station Glynco, Georgia, US  
Balloon launched by: Winzen Research Inc. (WRI)
Balloon manufacturer/size/composition: Zero Pressure Balloon Winzen (120 ft.Dia.)
Balloon serial number: 120-100-V-58
Flight identification number: WRI 869
End of flight (L for landing time, W for last contact, otherwise termination time): 5/25/1960 at 17:59 est (L)
Balloon flight duration (F: time at float only, otherwise total flight time in d:days / h:hours or m:minutes - ): 10 h
Landing site: SW of Moultrie, Georgia, US

The balloon was launched from Glynco Naval Air Base, near Brunswick, Georgia, on May 25, 1960 at 8:00 est. After release the balloon took 2 hours to reach float altitude of about 122.000 feet. The flight moved close to the coast of Georgia during 7 hours 30 minutes before being terminated at 17:31 est. Impact ocurred at 17:59 SW of Moultrie, Georgia.

• Cosmic-ray heavy nuclei at geomagnetic latitude 42° north J. Geophys. Res., 71(9), 2389
• Flight Summary Log Winzen Research Inc. report (1963)