NASA NTRS · 19800010212
A weekly ionospheric index
Abstract
The monthly and weekly T indices are discussed. Some possibilities for improving the reliability of the weekly T index are considered, including extending its applicability to daily variations of the global ionosphere.
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Turner, J. F., Wilkinson, P. J.. 1979-08-01. A weekly ionospheric index. https://ntrs.nasa.gov/citations/19800010212
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