A-GPS stored in NVS memory

[ali123]

From what I understand, when A-GPS data is acquired using the GNSS-sample it is automatically stored in the NVS-memory of the modem? If the system acquires A-GPS data and after this the system shuts down from let's say battery drainage, if the system starts up again in 5 minutes will the A-GPS data stored in the NVS-memory of the modem still be there and will it be used to acquire a fix? Or will it again generate an A-GPS request? Normally within this timespan the ephemeris data and the rest should still be valid.

[Naeem Maroof]

Hi,

using the GNSS-sample it is automatically stored in the NVS-memory

Yes; it is stored in the flash of SoC (e.g nrf9160). 

NVS-memory of the modem still be there and will it be used to acquire a fix?

The sample would download the requested assistance data only if needed. With P-GPS, the data may already be available in the flash memory and hence would be used.

Regards,

Naeem

[ali123]

But if the system is powered off and then powered on again, the A-GPS data will still be in flash-memory right? And this A-GPS data will be used as long it hasn't expired?

[Naeem Maroof]

Yes, it should be, as long as it is valid.