Hello,
We’re testing the nRF9160 GNSS performance on our custom PCB and have noticed that, even with A-GPS, the first fix after powering on the device takes significantly longer than subsequent fixes. This is a bit confusing because we’re using the GNSS sample for testing, and it should clear the GPS data during TTFF testing. While reading an article, we came across the following statement:
"Please note that the very first fix after device start-up is a rather different measurement than any of the following consecutive fixes."
Could someone please explain why this first fix behaves differently and is also related to AGPS?