5

I am currently working with QField on my tablet (Samsung Galaxy Tab S5e) and my smartphone (Samsung Galaxy A40). Since the positioning accuracy on my devices is rather low (absolute best case ~3m on an open field with clear sky), I am looking for lowcost ways to improve it in real time. Due to the high costs, I don't want to use an external GNSS receiver.

I've read that with RTK networks accuracies can be improved to sub-meter levels if you have raw measurements from your GNSS receiver, use a Ntrip-client and have access to correction data. This discussion: GNSS raw measurements on Android: Does real time/post processing Differential techniques possible?, and this article and the corresponding video: https://www.gpsworld.com/how-to-achieve-1-meter-accuracy-in-android/; https://www.youtube.com/watch?v=vywGgSrGODU gave me an overview of the topic, but I am still missing some things:

In the mentioned article/video from 2018 it says that there might be apps in a few years which will offer high-accuracy positioning with your smartphone. Does anyone know of an app that has been developed in the meantime and that achieves sub-meter accuracies with the GNSS-data received from a smartphone?

Improve this question
2
  • Positing that kind of technology change that far out sounds more fanciful than predictive.
    – Vince
    Apr 27, 2021 at 0:49
  • 2
    Even without looking at carrier phase, you could still use differential GPS. Use 2 phones. Leave one at a known location nearby as a base station. As the mobile unit moves, its changes are are a sum of actual movement and path difference due to atmospherics. The base unit will only respond to the atmospherics, which it can time-tag and store or send as a correction. Average the long-term data recorded at the static base station to get a more accurate position of the base, and therefore the mobile unit, post-mission (over coffee).
    – wingnut
    Apr 27, 2021 at 7:44

2 Answers 2

Reset to default
1

This thread on the GPSTest Google Group discusses this topic: https://groups.google.com/g/gpstest_android/c/uT2fmvu7ktA

That thread lists several apps, although I don't know if any of them have definitively proven sub-meter accuracy:

I've been tracking open-source GNSS apps here:

https://github.com/barbeau/awesome-gnss#android-apps-open-source

...but I don't know of any that have proven sub-meter accuracy using integrated GPS.

Improve this answer
0

Try mobile topographer it's very good for your situation.

Improve this answer

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.