I recently attended a presentation by Jan Van Sickle where he stated that autonomous positioning (survey grade) will be available "SOON". I asked what "soon" was, and he stated the next 10 years
Anyone have any insight when "soon" might be for mapping grade receivers....or if any are available now at decimeter grade?
You can achieve decimeter level accuracy or better with a L-Band correction service. The GNSS board/receiver has to be capable of this correction, but many are these days. Some use this to "fill in" when you lose UHF RTK corrections from a local base station or cellular based corrections or as a primary source of corrections. I know both Leica (SmartLink) and Trimble (RTX) offer this in their survey grade receivers. Both require fee based subscriptions.
I attended a seminar in Renton, WA a couple years ago wherein Dave Doyle said the same thing. In time there will be 120 +/- satellites available and at that time autonomous positioning will be at the sub decimeter level. This has the effect of ramping up positioning accuracy/precision expectations which in turn necessitates readjustments/upgrades of control, geoid modelling, projections.
If autonomous position includes PPP, then I think this is an accurate statement. However, in my opinion, L-Band services, both commercial (Atlas,Veripos, RTX etc.) and public (WAAS, EGNOS etc) are not autonomous positioning.
While definitions vary, in my opinion, autonomous positioning is the position achievable without any external correction source. Using that definition, I don't think we will see survey grade (cm) accuracy any time soon. But I think that decimeter level autonomous positioning will be achievable in ~10 years , for free, using only ephemeris and observations, provided by the satellites themselves.
Mark Mayer, post: 395020, member: 424 wrote: I attended a seminar in Renton, WA a couple years ago wherein Dave Doyle said the same thing. In time there will be 120 +/- satellites available and at that time autonomous positioning will be at the sub decimeter level. This has the effect of ramping up positioning accuracy/precision expectations which in turn necessitates readjustments/upgrades of control, geoid modelling, projections.
Dave Doyle told us about 9 months ago that centimeter level precision will be available with cell phones within 3 years...
