No fix even with satellites tracking

[Cora]

Hello,

Sometimes we don't get a fix when seeing 6 satellites with highest 27dB and  lowest 18dB signal strength. And sometimes we are able to get a fix with a GPS fix even with 1 satellite with a signal strength of 26dB.

We are resetting the device every 2 minutes, so it's a cold start for every attempt.

A) How is it possible to get a fix with not very strong signals and 1-2 satellites? and not able to get a fix sometimes with 6 satellites and same range of signal? 
How could we get a solution for this?

Tracking log example:

Format of +GPSSAT <SAT number>:<CN0 (dB/Hz)>- ... next sat etc 
All tracking data comes from the struct gps_sv.

Time stamp: 17:52
Text: device_352656100314221: +GPSSAT: 04:26.8-07:24.5-09:25.7-16:26.7-20:27.3-30:18.6-\n
Text: device_352656100314221: No tracking/fix

Time stamp: 18:01
Text: device_352656100314338: +GPSSAT: 07:26.3-\n
Text: device_352656100314338: +GPSFIX: (pdop:2.76, gdop:0.00, hdop:1.56, vdop:2.28, accuracy:8.84) 55.69270566,13.18368100,97.945\n

B) (different question) If we don't configure the field, What is the default setting for GPS tracking accuracy?

Thank you!:)
/Cora

[Hakon]

Hello,

 

We are resetting the device every 2 minutes, so it's a cold start for every attempt.

 It can take longer than 2 minutes to get a fix, regardless of tracked satelites. So you should up this number to maybe 5-6 minutes.

 

A) How is it possible to get a fix with not very strong signals and 1-2 satellites? and not able to get a fix sometimes with 6 satellites and same range of signal? 
How could we get a solution for this?

 What is the code you're running that prints this information? I can't find it in the SDK. Is it your own code?

 

B) (different question) If we don't configure the field, What is the default setting for GPS tracking accuracy?

 I believe the default value of this is GPS_ACCURACY_NORMAL.