Variations of the calculated cosmic-ray equator over a 20 year interval
Abstract
The location of the cosmic-ray equator for two different epochs has been determined by calculating the vertical cutoff rigidities in the equatorial region using geomagnetic field models appropriate for 1965 and 1975. A comparison of these results with the cosmic-ray equator determined for Epoch 1955 shows that whereas no significant changes for this 20-year interval are found in the longitudes between 0 degrees and 270 degrees E, the theoretical equator has shifted slightly northward in the longitude range 280 degrees to 350 degrees E.
- Publication:
-
Instrumentation Papers Air Force Cambridge Research Labs.
- Pub Date:
- November 1975
- Bibcode:
- 1975aifo.reptT....S
- Keywords:
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- Cosmic Rays;
- Geomagnetism;
- Magnetic Equator;
- Coordinates;
- Latitude;
- Longitude;
- Space Radiation