SOFIE (Scintillating Optical Fiber Isotope Experiment)

This detector system is a Cerenkov-Range-dE/dx experiment and utilizes range and trajectory detectors made of scintillating optical fibers, a fused silica Cerenkov counter, and plastic scintillator dE/dx counters to determine the charge and mass of cosmic ray nuclei.

Balloon launched on: 8/9/1991 at 2:07 utc
Launch site: Lynn Lake Airport, Manitoba, Canada  
Balloon launched by: National Scientific Balloon Facility (NSBF)
Balloon manufacturer/size/composition: Zero Pressure Balloon SF3-424.37-080-NSCHR-ST
Balloon serial number: W29.47-2-20
Flight identification number: 314N
End of flight (L for landing time, W for last contact, otherwise termination time): 8/10/1991 at 4:19 utc
Balloon flight duration (F: time at float only, otherwise total flight time in d:days / h:hours or m:minutes - ): 22 h
Landing site: 75 miles N of Peace River, Alberta, Canada

• NASA Balloon Flights (1989-1998) in NASA Historical Data Book, Vol. VII: NASA Launch Systems, Space Transportation, Human Spaceflight, and Space Science, 1989-1998
• Results of the 1991 Balloon Flight of the Scintillating Optical Fiber Isotope Experiment Thesis (PH.D.) by Westphall, Michael Scott - WASHINGTON UNIVERSITY, 1995.Source: Dissertation Abstracts International, Volume: 56-10, Section: B, page: 5552. (citation only)