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Apollo-Soyuz light-flash observations.

T F Budinger1, C A Tobias, R H Huesman

  • 1Lawrence Berkeley Laboratory, University of California, Berkeley, Calif., USA.

Life Sciences and Space Research
|January 1, 1977
PubMed
Summary
This summary is machine-generated.

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Astronauts observed 82 light flashes during spaceflight, with higher frequencies near the magnetic poles. This suggests cosmic ray detection is more common at higher latitudes.

Area of Science:

  • Space science
  • Astronomy
  • Particle physics

Background:

  • Astronauts experience light flashes in space due to cosmic radiation.
  • Understanding these events is crucial for human spaceflight safety.

Purpose of the Study:

  • To document and analyze light flash events observed by Apollo-Soyuz astronauts.
  • To investigate the correlation between light flash frequency and geographic location, including magnetic poles and the South Atlantic Anomaly.

Main Methods:

  • Observation of light flashes by two astronauts during a 51-degree orbit.
  • Recording the frequency of events in different orbital regions.
  • Comparing observed frequencies with expected cosmic particle flux.

Main Results:

Keywords:
NASA Experiment Number MA-106

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  • Eighty-two light flash events were recorded.
  • Event frequency was 25 times higher at polar regions compared to equatorial latitudes.
  • No increased frequency of events was detected in the South Atlantic Anomaly at 225 km altitude.

Conclusions:

  • Cosmic ray detection, perceived as light flashes, is significantly influenced by geomagnetic latitude.
  • The South Atlantic Anomaly did not show an increased event rate at the observed altitude.
  • Observed events align with expectations for HZE particle flux below the Cerenkov threshold.