Android Question GPS receiver problem

Discussion in 'Android Questions' started by sirjo66, Mar 26, 2015.

  1. sirjo66

    sirjo66 Well-Known Member Licensed User

    Hello to all,

    I post here my question because I don't know where to post it, sorry for the inconvenience.

    I bought a Samsung Tablet 7" (model SM-T210) but I have some problems with GPS receivers.

    Here is in attachment an image with GPS test where you can to see that my phone see 11 satellites, and tablet see only one satellite :(

    I have try to reset (factory reset) the tablet, but it no change.
    I have also try to run "GPS doctor" https://play.google.com/store/apps/details?id=com.epekware.gpsdoctor
    This program reset all GPS datas and download new datas from internet, but no change

    Is there some things that I can try to do before send my tablet to the technical assistance ??

    Many thanks for your support
    Sergio
    Immag0412.jpg
     
  2. Troberg

    Troberg Well-Known Member Licensed User

    Have you tried just leaving it on for a few hours? Sometimes, it needs to update the orbits of the satellites (for example, whenever USA goes to war, they adjust the orbits a bit to get better coverage over that area), especially a new device, and that may take some time. The satellites are on 90 minute orbits, so three hours should get most of them, and six will probably get them all. Once it gets current data, it will just keep itself updated on the go, if you don't shut off the GPS.
     
  3. sirjo66

    sirjo66 Well-Known Member Licensed User

    Many thanks for your answer, I will try it
     
  4. Erel

    Erel Administrator Staff Member Licensed User

    You need to test it outdoors. GPS reception is too weak indoors.
     
  5. sirjo66

    sirjo66 Well-Known Member Licensed User

    Yes, the test was made outdoors, in fact as you see from the image above my phone works correctly
     
  6. gz7tnn

    gz7tnn Member Licensed User

    Hi sirjo66
    I have the same tablet and it works fine for me.
    attached is a screenshot of the tutorial app I tested from this site ( http://www.b4x.com/android/forum/threads/gps-tutorial.6592/ )
    You can see from this that I have 11 satellites identified

    What I have experienced, and also with the gps navigator in the car, is that you do need to move for the device to better locate satellites.
    The screen shot was taken after I had driven in the car for a while. It did not take long for the first 4 to show up and the rest took only a little more time.

    hope that helps.
     

    Attached Files:

  7. Troberg

    Troberg Well-Known Member Licensed User

    Another thing, depending on where you live, positioning if the reciever is important. Nominally, the satellites are in polar orbits, but, because they don't want extensive coverage of the poles, the orbits are tilted (55 degrees, iirc), so the satellites turn at about 55 degrees latitude (varies a bit with each satellite).

    So, what does this mean? Well, for me, who lives at about 60 degrees, I need to place the reciever so that it has a view of the sky south, because I will have few or no satellites north of me. This is very noticeable when driving with the phone on the dashboard. When driving south, I get many more satellites than when driving north, as the car roof blocks the view.

    Who said things can be easy? :)
     
  8. sirjo66

    sirjo66 Well-Known Member Licensed User

    SOLVED !!!

    I have send my tablet to the technical assistance and he have change main board, now it works very fine !
     
    Troberg likes this.
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