On Sat, Nov 14, 2009 at 10:16 AM, Sajjad Anwar <[email protected]> wrote:
> > > On Sat, Nov 14, 2009 at 6:41 AM, Kenneth Gonsalves <[email protected]>wrote: > >> http://blog.makezine.com/archive/2009/11/diy_real_time_kinematic_gps.html >> > sounds good. the real time kinematic system ensure better accuracy. > I guess no reference stations in India - forget within 10 kms - check the comments: >> As the web page makes clear, two receivers are used. The paper linked at the top of the page shows the second receiver as a geodetic-quality (presumably dual-frequency) receiver, but another copy of the low-cost rover would be fine for differential measurements not requiring a link to the global WGS/ITRF coordinate system. It's worth mentioning that many GPS reference stations publish their data freely, so an amateur can indeed get few-centimeter accuracy to ITRF with a single low-cost L1-only receiver provided a reference station is available within 10 km or so. A good fraction of the continental USA meets this requirement.
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