At 11:33 AM 12/9/97 -0800, you wrote:
>Hello,
>
>I am interested in more information on GPS.  Does anyone have any good
>links?
>
>Questions:
>
>        1) Has anyone interfaced a gps receiver with a pic before?
>        2) Source of low-cost gps receivers?
>        3) How accurate are they?
>        4) How do you interpret the data and calculate your location?
>
>Any information would be appreciated!
>
>-Randie
>                                    ________
>   Randie Ohtsji                   / ____/ /__  ____  ____ ___  _________
>   email: rohtsji@glenayre.com    / /___/ / _ \/ __ \/ __ `/ / / / __/ _ \
>   Glenayre R & D                / /_\ / /  __/ / / / /_/ / /_/ / / /  __/
>   Vancouver, B.C.  CANADA       \____/_/\___/_/ /_/\__,_/\__  /_/  \___/
>   Phone: (604) 293-1611 x4555      ________________________/ /
>   Fax:   (604) 293-4317           /_________________________/
>

Hi Randie,

Have a look at:

http://www.navcen.uscg.mil/gps/reports/sigspec/gpssps1.pdf

and

http://www.navcen.uscg.mil/gps/reports/sigspec/gpsspsa.pdf


These are the official GPS signal specifications from the U.S. Coast Guard.
I'm not sure if this is what you are looking for (i.e. it won't tell you
how to interface to a GPS receiver) but this has most if not all of the
technical specs needed to design a GPS receiver or to figure our the error
in a GPS reading due to certain circumstances.

Good Luck,

Sean



+--------------------------------+
| Sean Breheny                   |
| Amateur Radio Callsign: KA3YXM |
| Electrical Engineering Student |
+--------------------------------+
http://www.people.cornell.edu/pages/shb7
mailto:shb7@cornell.edu