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December 29, 2009
Tutorial - GPS Tracking Comparisons
about 3 years ago
The link to Springer Extras, for PDF of Volume I, Fundamentals of GPS, D. Doberstein, is
you can also find the design files for a single channel GPS receiver there.
If you want a prep/beginner material on GPS , start with Vol I.
read the comments above and have a small adjustmen: every GPS sat has an atomic clock that is very nearly syncronized with all the other Sat clocks, any error in that sync is in the data stream each sat sends down at 50bits per sec. Sat clock error is typically less than a micro second. The distance to each sat is measured by comparing the recieved time with transmit time, where recieve time is determined by a clock in your hand held GPS receiver. There in lies the rub, your receiver clock must be syncronized to sat clocks or each measurement , to each satelitte, has an error in it. This is why one extra sat is needed in nav solution ; to solve for your receivers on clock error with respect to SV clocks ( more accurately GPS time).
I wrote a two volume book on GPS, you can down load volume one for free, see Springer Publications web site, Fundamentals GPS, Dan Doberstein. Volume one covers measuring distance using clocks and GPS clock system, etc.
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