For the past 40 hours we have been experiencing active solar x-rays flares and as well aslo unsettled geomagnetic storms so GPS satellite locking will be difficult and unreliable. Also, you need to make sure the GPS unit is properly programmed. The only way to see what is going on is connect the GPS directly to U-Center to see what is happening.
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There could be many reasons. First Check Solar Activities
see the Kp Index on the graph was mostly red.
For the past 40 hours we have been experiencing active solar x-rays flares and as well aslo unsettled geomagnetic storms so GPS satellite locking will be difficult and unreliable. Also, you need to make sure the GPS unit is properly programmed. The only way to see what is going on is connect the GPS directly to U-Center to see what is happening.