get navigation message from android device

[mohamed fathi]

i want to ask can smartphones get navigation message (ephemeris and almanac )  ? 

[mohamed fathi]

By other words how to get satellite position from Android received data 

On Mon, Sep 13, 2021, 1:42 PM mohamed fathi <mohammedf...@gmail.com> wrote:

i want to ask can smartphones get navigation message (ephemeris and almanac )  ? 

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[dnw...@gmail.com]

You do not need to get this data from your device, it is available from other sources, see -

https://cddis.nasa.gov/Data_and_Derived_Products/GNSS/broadcast_ephemeris_data.html#GPSdaily

[Sean Barbeau]

Mohamed,

The short answer is yes, but only a relatively small number of Android devices support the Navigation Messages API. I wrote about this here:

https://barbeau.medium.com/decoding-android-gnss-navigation-messages-93bc62e2eb00

And the above post is correct, if you're doing post-processing, you don't need the data directly from the device in real-time, you can get it from other sources. I talk about this in the article as well.

Sean

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[mohamed fathi]

All thanks and appreciation to you Dr sean.

Excuse me  for the inconvenience,

 Is there any way to stream this  data from mobile to pc "matlab" and process it online ? 

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From: gpstest...@googlegroups.com <gpstest...@googlegroups.com> on behalf of Sean Barbeau <sjba...@gmail.com>
Sent: Thursday, September 16, 2021 12:07:25 AM
To: dnw...@gmail.com <dnw...@gmail.com>
Cc: GPSTest <gpstest...@googlegroups.com>
Subject: Re: get navigation message from android device

 

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[Sean Barbeau]

I don't know of a way to stream the data directly. You can log the nav message data to text files on the device using GPSTest and then load those up:

https://github.com/barbeau/gpstest/blob/master/LOGGING.md#logging-data-to-files

You might want to check the awesome-gnss list to see if anything there would work:

https://github.com/barbeau/awesome-gnss

Sean