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en:help:1.4:tracker [2015/02/09 18:03] – external edit 127.0.0.1en:help:1.4:tracker [2015/09/02 11:50] – alpinequest
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 <sub>[[en:help|Online Help]] > [[en:help:1.4|AlpineQuest 1.4]]</sub> <sub>[[en:help|Online Help]] > [[en:help:1.4|AlpineQuest 1.4]]</sub>
-===== The Location Tracker =====+====== The Location Tracker ======
  
 The AlpineQuest GPS Location Tracker is a background service that records all your locations and creates a track of your hikes. The AlpineQuest GPS Location Tracker is a background service that records all your locations and creates a track of your hikes.
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 {{:icon_help.png?nolink}} The barometric data is auto-calibrated by AlpineQuest using GPS locations. {{:icon_help.png?nolink}} The barometric data is auto-calibrated by AlpineQuest using GPS locations.
 +
 +
 +===== Common issues with the Location Tracker =====
 +
 +A common issue when recording a track is to lost the GPS location fix, leading to a missing part in the track (seen as a straight line longer that usual in the track). Usually, it happens because the device doesn't have a good enough access to the sky, for example when the device is in a pocket or in a bag. The GPS signal emitted by GPS satellites is weak and get easily lost when going through any hard material. If you have the "**''lost of signal warn''**" {{:icon_06.png?nolink}} setting activated, the application will play a song when it loose the GPS signal.
 +
 +Also, tracking a path requires frequent GPS location updates and some devices (mainly old or low-cost ones, but not always) doesn't support the GPS being turned on for long hours. Common symptoms in this case can be:
 +
 +  * The device becomes more hot than usual;
 +  * The GPS doesn't report anymore satellites for some time, the location fix is lost, leading to a missing track part;
 +  * The Location Tracker is simply closed by the system, the tracking is stopped.
 +
 +If you encounter one of these symptoms, you can try to:
 +
 +  * Reduce the tracking frequency, a location per 10 seconds is a recommended setting for hours long tracks;
 +  * Use an economy tracking frequency (starting at 1 location / 20 seconds), in which the GPS is completely turned off between update. Be sure to leave your device in view of the sky so the GPS can quickly retrieve a location for each update;
 +  * Turn off the recording of barometric elevations to leave the pressure sensor turned off (this one can also be the source of issues when continuously used for long time).
  
  
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   * [[en:help:1.4:landmarks:format-gpx#how_to_export_tracks_in_gpx_format|How to export tracks in GPX format ?]]   * [[en:help:1.4:landmarks:format-gpx#how_to_export_tracks_in_gpx_format|How to export tracks in GPX format ?]]
   * [[en:help:1.4:landmarks:format-kml|How to export tracks in KML format ?]]   * [[en:help:1.4:landmarks:format-kml|How to export tracks in KML format ?]]
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