• глонасс рулит!﻿

• 2 meters﻿ accuracy, it's very impressing

• Note that a few GPS chips providers are working on GLONASS support, e.g. Telit SL869. What is more, Cloud Your Car providing simple tool optimizing fuel economy for international trucks﻿ supports GLONASS because it boosts positioning accuracy. While development we found out that with traditional GPS we could have usualy 8-12 satellites on the sky. With GLONASS we see at least 20 (!) satellites that makes obtaining first fix much faster and boosts its general performance.

• Theoretically, you only need 3 satellites to get your location. The principle of GPS is based on finding a point with other 3 reference points in 3D coordinate system using time, distance & reference points.

But since it's difficult to find the precise times and there's a transmitter-receiver time error (or﻿ something like time difference), it needs 1 more satellite to fix that time difference error. That's why you need minimal 4 satellites. More satellites only makes the accuracy better.

• Одна из немногих радостей России.﻿

• uhhh cool!﻿

• thank you Russia for giving﻿ the people of the world 24 more sattelites

• WRONG, civilian GPS like Trimble Survey Equipment can be under 10cm accurate. Anybody can by them for a few thousand USD. The problem is that they require large pieces of equipment and large antennas to﻿ get that kind of accuracy. I got to borrow two sets for a environmental survey I was technical consultant.

• Altitude is kind of very useful especially aviation, thus need more than 3. I was hiking a mountain, great to see my phone report﻿ Altitude live as we walked.

• I have never been able to get a lock on GLONASS with my LG 4X HD. I can see the satellites there but will never lock. Is﻿ there a way to force it to lock on GLONASS? I just want to see it work once.

• 3 is enough only to show your position on map without height, to show height you need at least 4 signals. It's math, to calculate exact position on 2 dimensional plane you need at least 3 points of reference, to do the same on 3 dimensional - you need one more. Simple as that ;)﻿