mpourdas wrote:I think I explained my problem very precisely in my first post. It is not a problem related to the number of available satellites. Even if there are many, my altitude is frozen to 0 and everything else is fine. With gjak 1.08 skin, the number of available satellites also shows up as zero (even though this is not true) in the bar in the bottom. So the altitude and the APPEARED number of satellites are correlated for sure at least in my gps.
Assume that by standing in the same place I put it to sleep and then wake it up. Then both fields, that is the appeared number of satellites and altitude, start to show values. For example, if I am in my home city, 7-8 satellites and a reasonable altitude of around 250m show up. The rest of the GPS is working normally, before or after the sleep/wake procedure.
So, I tried to play with various settings in my GPS but with no success. So I started to search the internet for sys.txt files to see what are the "lines" that people use. Btw my sys.txt is rather minimal, almost like the one given by Yurbuh here a few days ago in his repair kit). Given all the above, I looked for lines containing the word satellite, but nothing was found, or gps; anything that would "trigger it". So I tried under [gps] things like source=..., port=... and the one with set_messages=0 worked. If I remove it, back to the problem. I say again I do not know why, I do not even know what this line is supposed to do. Neither the baud that was mentioned in a previous post.
I have done the "experiments" driving from home to work and also one day in a parking, nothing to argue on that aspect. So I have solved my problem, but I do not understand "why".
You clearly missed my point. That is when I am correct in a way. The altitude above the horizon the satellites are is important, I believe.
I explain why I think that:
When somehow the 24 satellites would be in a flat circle, they could only determine your location in 2D, right? But when they are in a round shape, a basketball, they can exactly spot you in 3D, which is what the relation is between altitude and position on the map.
Only we are talking about 3 or 4 or 5 satellites, constantly moving. So when for a short moment the satellites can't determine your 3D in a ball because they are on a relatively flat circle ....
But it was just an idea. And it makes sense. To me :o
I sure don't understand why the sys.txt line does work. But when, the better