Yo Greg! On Thu, 27 Nov 2025 19:19:40 -0500 Greg Troxel <[email protected]> wrote:
> >> Surely that 0.03m is based on assumption of RTK FIX. > > > > Pretty big assumption to leave off of the spec sheet. > > Agreed that this should have been stated more clearly. I's also an > error to leave out that the device is supposed to achieve FIX with the > reference data (so-called correction) SPARTN stream. On closer examination: https://www.u-blox.com/en/product/pointperfectflex There is a footnore #1: 1. Horizontal accuracy: Typically, 3-6 cm with a compatible receiver. All accuracy results are based on: a) error-free GNSS observation data b) receiving complete and uninterrupted correction data c) ambiguity-fixed position results So a circular definition. It works when it works. Otherwise, it does not work... > I'd say the device you have with the SPARTN stream you have, as you > are experiencing it, is not meeting its specifications, and isn't > operating in the mode they intend it to operate in. I'm operating it per u-blox instructions. But, since I do not have RTKFIX, it is within spec not to be 3-6cm "accurate". RGDS GARY --------------------------------------------------------------------------- Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703 [email protected] Tel:+1 541 382 8588 Veritas liberabit vos. -- Quid est veritas? "If you can't measure it, you can't improve it." - Lord Kelvin
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