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

Is this even possible ?

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Real 3490

Originally Posted by giuseppe66

photoshop or what?

No Photoshop it's called Hotfix

If I delete the /.System/GPX Folder at this location it never picks up satellites even after waiting 20 minutes.

Then I go outside to the Garden and it picks up sats First 27m after a minute 14 meters another minute 7 meters another minute 3 meters, Then stays 3 meters.
Then I come back to this location which is under a steel roofed carport and it stays 3 meters for about 5 minutes and then it starts to drop gradually.
I think that this screen is indicative but it has a lot of "smoke and mirrors" created magically by the firmware.
The /.System/GPX folder holds the files needed for the hotfix. It already knows which birds are flying overhead at any time of the day. (It learns all the time)
It actually takes a couple of days to learn all 32 Sats. After deleting the folders in the evening the next morning it takes a long time to get a 3Meter Fix.
I believe that deleting the GPX folder is the same as cold start. (Starts without knowledge of sats)

Originally Posted by dasilvarsa

Is this even possible ?

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Real 3490

Originally Posted by giuseppe66

photoshop or what?

I don't believe for i second that dasilvarsa would do such a thing as photoshop an image before posting it. I've seen that 3 metre so-called 'Accuracy' with similar low sat. lock numbers and signal strength on original 34/35xx units. I've stated before and will again categorically that i do not believe it is possible for a non-professional gps device without SBAS enhancement to consistently maintain that accuracy under a wide range of conditions. I assume the 'photoshop or what?' comment was a joke. Kanopus is right in that many of the tests (mine included) are not very scientific (garbage in, garbage out) but more anecdotal. Even the side-by-side tests rely on the units accurately reporting their true accuracy are suspect. Consistent 3-4 metre accuracy shown by 34/35xx is garbage imo. Angelo has done static tests over a permanent mark, can't get more reliable than that. But the big problem is moving accuracy for some units. I still think that the only real answer is by modding 37xx gps fw into the 34xx to overcome the hardware incompatibilities which are obviously worse in some 37xx coverted to 34xx. I can't do it, can any of you other blokes without 'Navigation software expert' behind your nicks do it? If not, we should all shut up and let the experts like Loly & Kanopus find the solution because i don't know if we can add anything more that's constructive unless the further tests are totally scientific and tailored, but really what will they prove? That some units have 'bad' accuracy, which their owners already know? We can do all the further testing we want, but more tests won't solve the problem ....