RE: Some questions about nrf9160

JONATHAN LL — Wed, 15 Sep 2021 13:11:21 GMT

If GPS is not then there is no need for Ephemeris and Almanac.

Regards,
Jonathan

RE: Some questions about nrf9160

helen — Tue, 14 Sep 2021 08:32:57 GMT

Getting the location of a device without GPS,How do it get Ephemeris and Almanac in this way?

RE: Some questions about nrf9160

JONATHAN LL — Mon, 13 Sep 2021 12:35:22 GMT

Hi Helen,

[quote user=""] 1、How can fast lte-m link have Ephemeris and Almanac?What is the principle?[/quote]

Ephemeris and Almanac can be downloaded with the use of A-GPS, making Time To First Fix(TTFF).

[quote user=""]Why provide current and neighbor cell information?What are current and neighbor cell information used for?[/quote]

As an alternative to GPS. This is a different way to get position.

[quote user=""]What is LTE location services mainly used for?[/quote]

Getting the location of a device without GPS or other means to find the location.

[quote user=""]What is the meaning of the part circled by the red line in the following picture？[/quote]

It providing a scenario with the listed topics, Idle ect...

[quote user=""]Why can asset tracking be realized without GPS?[/quote]

When using an alternative to GPS that still provides a good accuracy for the whereabouts of the device, the application is still able to provide the location.

Regards,
Jonathan