S4 Index
Parameter used to measure ionospheric disturbances From Wikipedia, the free encyclopedia
The Index is a standard index used to measure ionospheric disturbances. It is defined as the ratio of the standard deviation of signal intensity to the average signal intensity.[1]
 | This article relies largely or entirely on a single source. (March 2024) |
Real Time data
This parameter is displayed in real time by many institutions:
References
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