Re:seizmologists? (Score 1)

two ways to get more accurate data, though I have never used them myself, but they deliver sub-meter accuracy: 1) differential is not averaging but using another transmitter(not GPS sats, can be a radio) to get increased accuracy, b/c you know that this one is not distorted. Works very well, the US coast guard uses it and it is also used in the Aegeis where they simply but up another radio transmitter on an island to be able to stir more accurately around seom cliffs. In Germany and Europe they even use the radio signal of the caesium clock in Braunschweig? 2) use the Russian system additionally to the GPS system, some European receivers can read them both.