[Loadstone] GPS periodicity

Cathomas Jürg Juerg.Cathomas at sbv-fsa.ch
Thu Jul 5 21:17:28 BST 2007

So far, i had never more than 10 satellites at home.
Now, suddenly i had 11 and even 12 for a while, but only on one receiver.
As i read, there is a certain periodicity in satellite constellation, i'd like to look next time whether the same conditions really repeat.
Does anybody know the periodicity of satellite constellation for middle Europe?
Or do exist formulas to calculate good conditions for a certain area?

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