search

Ai-Thinker-Open / GPRS_C_SDK

Ai-Thinker A9/A9G GPRS (with GPS(A9G)) module C development SDK
https://ai-thinker-open.github.io/GPRS_C_SDK_DOC
MIT License
449 stars 235 forks source link

GPS satellites #498

Closed JazminFerre closed 3 years ago

JazminFerre commented 3 years ago

Hi, I'm testing the GPS mode, with the GPS demo code, and it works. However, it must be connected to 9 satellites to get the correct location. I think it should work with 3 satellites connected. Can somebody help me? The location where I am is quite clear. Thanks!!!! Greeting, Jaz

ZakKemble commented 3 years ago

4 satellites are the minimum required for a fix. The position of the satellites is also important; if it has a lock on 4 and they're all bunched together in the same area of the sky then the receiver will have a hard time working out its position. The more satellites locked the quicker its position can be determined. Your module likely had to lock to 9 satellites before it found some that were spread out enough and had a good enough signal before it could acquire a fix.

JazminFerre commented 3 years ago

OK thank you!! That was a pretty clear explanation.