Thread: About 37xx converted to 34xx satellites reception accuracy

Neil!!! Sorry! I was sincerely going to go on pub with you and other man yesterday but as usually I saw a woman's short skirt and walked after her. Be patient - no sex pictures here! Woman's short skirt was a looking for 153 PRN description in Inet source about SBAS, when online searching for satellites in occasional link, at the end it was launching of missile into the carrier rocket that hanging over my house and spying on me (do you see new from Russia about "Зенит-3SL" today?).

OK! Begin from bushes. I often dissemble about my sincere interest to advanced knowledge about GPS devices. Most of my discussion in a raised voice it is nothings for me. It is only workout for the mind! In my settled opinion GPS is means to achieve the other main purpose. The main purpose is locomotion. That is why on first place I have question where Neil is driving, Jesus Christ. And then I think about 37xx converted to 34xx satellites reception accuracy So the great Australian Bush is more attractive for me then photo of MT3351 chipset even on a rainy overcast day.

Well, about workout for the mind actually!

1) I have the belief what geometric dilution of precision (GDOP) is not very objective after I can see number less 15 meters on screen.
http://en.wikipedia.org/wiki/Dilution_of_precision_(GPS)
Too many other factors are trying to challenge that figure. Yes! SBAS must kill this factors by default on right device. But we look a bad DOP (fewer GPS satellites with bad dispersion) on it. Purity of the experiment with digit of accuracy blurred by different quantity and quality of true GPS satellites (not SBAS). But nothing prevents confirm the conclusion what right device (Nuvi 3490) clearly captures fewer GPS satellites.

2) In my case above was EGNOS and not WAAS. I think no difference at all SBAS what present in world. All of them are working on GPS standard signal specification and so WAAS give in device text resource for the sake of brevity.

3) SBAS is good thing! But as mentioned above it have GPS signal specification. Accordingly it works in full measure only with professional device that use several GPS channel simultaneously (L1, L2 and so on). It just gives a some increase in stability on Nuvi but not 100 percent positive result.