Apollo-Soyuz light-flash observations

While dark adapted, two Apollo-Soyuz astronauts saw eighty-two light flash events during a complete 51 deg orbit which passed near the north magnetic pole and through the South Atlantic Anomaly. The frequency of events at the polar parts of the orbit is 25 times that noted in equatorial latitudes an...

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Bibliographic Details
Main Authors: Budinger, T. F., Tobias, C. A., Huesman, R. H., Upham, F. T., Wieskamp, T. F., Hoffman, R. A.
Format: Other/Unknown Material
Language:unknown
Published: 1977
Subjects:
52
North Magnetic Pole
Online Access:http://ntrs.nasa.gov/search.jsp?R=19780031282
Description
Summary:While dark adapted, two Apollo-Soyuz astronauts saw eighty-two light flash events during a complete 51 deg orbit which passed near the north magnetic pole and through the South Atlantic Anomaly. The frequency of events at the polar parts of the orbit is 25 times that noted in equatorial latitudes and no increased frequency was noted in the South Atlantic Anomaly at the 225-km altitude. The expected flux of heavy particles at the northern and southern points is 1-2/min per eye, and the efficiency for seeing high Z-high energy (HZE) particles which were below the Cerenkov threshold is 50%.

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