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sci.geo.satellite-nav (Global Satellite Navigation) (sci.geo.satellite-nav) Discussion of global navigation satellite systems (GNSS). Topics include the technical aspects of GNSS operation, user experiences in the use of GNSS, information regarding GNSS products and discussion of GNSS policy (such as GPS selective availability).

Google to provide raw GPS measurements



 
 
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  #1  
Old July 16th 16, 01:59 AM posted to sci.geo.satellite-nav
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Default Google to provide raw GPS measurements

An article in the July 2016 GPS World magazine states that raw GPS measurements will be available to apps in the Android N operating system, which will be released later this year. This means you can get pseudoranges, doppplers, and carrier phase from a phone or tablet!
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Old July 18th 16, 05:14 PM posted to sci.geo.satellite-nav
Stichting ST
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Default Google to provide raw GPS measurements

On Sat, 16 Jul 2016 16:53:15 +0200, Terje Mathisen
wrote:

wrote:
An article in the July 2016 GPS World magazine states that raw GPS
measurements will be available to apps in the Android N operating
system, which will be released later this year. This means you can
get pseudoranges, doppplers, and carrier phase from a phone or
tablet!

That is extremely interesting, it would seem to make it possible to use
any pair of Android N devices as a base+rover setup for cm (or least
sub-sub-meter) resolution measurements. (The lack of a proper antenna
will probably be the real limiter.)

With an app which stores all the raw data you should also be able to do
post-processing with a single device plus some reference station data.

Terje


Sure that is very nice if it becomes real.
Many years ago I used an Garmin GPS12 (can output raw data) that with RINEX
conversion gave me with postprocessing and an hour measurement a 95% position
accuracy of 40 cm. (basestation placed 15 km distance)
But remember: on a single wavelenth you do not know the ionosferic delay so cm
accuracy can not be reached. The problem of the unknown positon of the
faze-point of the antenna is secundair.

Piet
 




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