Hi Brian:
A friend has an Android cell phone with built in GPS. It has a
resolution of 0.0001 arc seconds as does the GPS I just got for my camera:
http://www.prc68.com/I/Nikon.shtml#GPS
I think it's a common feature of the newest SiRF chip set. What's not
know is how accurate they are. My friend thinks the resolution is
really accuracy, but I'm skeptical about that.
The last few generations of military GPS receivers have an application
called "Gun Laying" (aka. North Finding) that works by doing carrier
phase measurements to determine the distance and bearing between any two
points where you can get from one to the other in under 3 minutes.
http://www.prc68.com/I/DAGR.shtml#AzD
This can be used to make a relative survey. To get an absolute survey
typically requires post processing or use of differential corrections
(LF beacons or WAAS).
Have Fun,
Brooke Clarke
http://www.PRC68.com
wa1...@att.net wrote:
I wish to survey some of my land here in the US. What used GPS
receivers out there might be good candidates?
I really don't want to haul a Z3801A out in the woods and run a
self-survey unless the cost is too high. :-)
-Brian, WA1ZMS
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