How many meters do the GPS satellites wander around?

May 15, 2009 by admin · 2 Comments
Filed under: Engineering 
gps
Barney asked:


The satellites wander around and are stabilized with short “burns” of rocket fuel. How many meters do they wander before the ground station orders them to move? I would also strongly suspect (correct me if I am wrong) that the absolute position can be corrected in software to some extent. but with accuracies on the ground of 5 meters or so, I would think the satellites would have to be pretty stable. Yet on the other hand it’s hard to imagine those things being nailed to the sky.

Why does it take my GPS so long to find a signal?

March 19, 2009 by admin · 2 Comments
Filed under: PDAs & Handhelds 
gps
capusle j asked:


My parents won a jensen portable gps at a casino. when its up and running it works fine, but it takes a long time for it to find a signal. a gps with no connection the the satellite is useless. i have to wait about 30min to an hour for it to find a signal.

Im always out in the open with a clear view of the sky when operating my gps. why is mine like this? this can’t be normal.