Volume 8 Issue 2
Apr.  1988
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Han Fu-fen, Huang Chang-li. Differences of Spread-F at Haikou and Huancayo[J]. Journal of Space Science, 1988, 8(2): 133-137. doi: 10.11728/cjss1988.02.133
Citation: Han Fu-fen, Huang Chang-li. Differences of Spread-F at Haikou and Huancayo[J]. Journal of Space Science, 1988, 8(2): 133-137. doi: 10.11728/cjss1988.02.133

Differences of Spread-F at Haikou and Huancayo

doi: 10.11728/cjss1988.02.133
  • Received Date: 1987-08-05
  • Rev Recd Date: 1900-01-01
  • Publish Date: 1988-04-24
  • In this paper,the local time,seasonal and solar cycle variations of frequency spread-F at Haikou during years of maximum and minimum sunspots are studied.Comparing frequency spread-F at Haikou with frequency spread-F at Huancayo,it is found that differences of frequency spread-F at two stations are obvious.During maximum sunspot years,the occurrence of frequency spread-F is maximum between 2000-2100 LT at Haikou and at 0000 LT at Huancayo.During minimum sunspot years,the occurrence of frequency spread-F reaches a rather flat peak between 2300-0400 LT at Haikou and reaches a peak at 0000 LT at Huancayo.For seasonal variation,the occurrence of frequency spread-F at Haikou is maximum during equinoxes in maximum sunspot years and during summer solstice in minimum sunspot years,the occurrence of frequency spread-F at Huancayo is maximum during the winter solstice in both maximum and minimum sunspot years.

     

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