Re: measuring 10 km with 1m accuracy

On Feb 15, 4:13 am, Surinder Singh <gogreenmi...@xxxxxxxxx> wrote:
Hi,

What would be best technology (GPS,IR,Radio/freq,ultrasonic etc) for
doing distance measurements upto 10km with accuracy of 1 meter?

..> GPS could be good for greater distance but accuracy seems coarse.

- Surinder

Surveying grade GPS code based instruments can provide sufficient
accuracy at the cost of more time (and money) than the shirt pocket
GPS receivers take. If you are only interested in distance and not
position you can use real time kinematic (RTK) GPS instruments that
process relative positions based on GPS carrier phases instead of
codes. See:

http://en.wikipedia.org/wiki/Real_Time_Kinematic

Dale B. Dalrymple
.

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