Grötzsch graph: Difference between revisions
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Included the crossing number. Source: http://mathoverflow.net/questions/94282/crossing-number-of-the-grotzsch-graph |
en>Thore Husfeldt added Category:4-chromatic graphs using HotCat |
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The '''<math>S_4</math> Index''' is a standard [[scale (social sciences)|index]] used to measure [[Ionosphere|ionospheric]] disturbances. | |||
==Real Time data== | |||
This parameter is displayed in real time by many institutions: | |||
*[http://gps.ece.cornell.edu/scintplot_aopr.html at Arecibo Observatory] | |||
*[http://gps.ece.cornell.edu/scintplot.html at Cornell University] | |||
*[http://200.241.80.42/gps/scintplot.html at INPE's Sao Luis Observatory in Brasil] | |||
==References== | |||
{{reflist}} | |||
[[Category:Ionosphere]] | |||
{{climate-stub}} |
Revision as of 06:37, 13 April 2013
The Index is a standard index used to measure ionospheric disturbances.
Real Time data
This parameter is displayed in real time by many institutions:
References
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