GDA2020 in Australia

Danb

New Member
Hi,

Since the AUSCORS network here in Australia changed the corrections transmitted from their base stations to GDA2020 two weeks ago, we've been unable to get a fixed solution - correction data is coming through fine, but it just floats at around the 50mm positional accuracy.

There is no option to select the IRTF2014 reference frame in configure NTRIP screen.

Any suggestions on how to fix this issue?

Cheers,
Dan
 

Yuri Noyanov

Active Member
5PLS
We will add ITRF2014 to reference frame list, but fix probability is not related to this settings - the reference frame will just modify result position. Also ITRF2008 and ITRF2014 are so close (about millimetre per year) so the reason is in different. Float solution can be in any place so Fix solution is required of cause.
We should investigate other factors that don't let you get fix solution.
Do you use extrapolation mode, do you use RTCM3 corrections with coordinate system parameters?
 

Danb

New Member
Thanks for the quick reply Yuri,

I've turned extrapolation off, and still don't get a fixed solution. Yes they are RTCM3 corrections and I've chosen GDA2020 CS AusGEOID2020 geoid. Below are the screenshots showing all settings. Before the government changed over to GDA2020 two weeks ago we would get 3-4 out of 4 multiRTK solutions within seconds, now in the same location we cannot get a fix after 15 minutes.

Cheers,
Dan

Screenshot_2019-02-21-09-18-30-915_com.javad.javadtools.pngScreenshot_2019-02-21-09-18-39-215_com.javad.javadtools.pngScreenshot_2019-02-21-09-18-47-643_com.javad.javadtools.pngScreenshot_2019-02-21-09-18-54-593_com.javad.javadtools.pngScreenshot_2019-02-21-09-19-00-248_com.javad.javadtools.pngScreenshot_2019-02-21-09-19-15-262_com.javad.javadtools.pngScreenshot_2019-02-21-09-19-22-032_com.javad.javadtools.pngScreenshot_2019-02-21-09-19-44-120_com.javad.javadtools.png
 

Shawn Billings

Shawn Billings
5PLS
On the surface all of your settings look good to me. The mountpoint you are using is only 16km away, so should be within RTK range. FLT definitely means you are getting corrections and that the processor is decoding them and using them in the position. The 7+7 tells me that you are getting GPS+Glonass corrections. I'm not sure...
 

Yuri Noyanov

Active Member
5PLS
For Ntrip you have to use extrapolation - delay between corrections are about several seconds. Turning extrapolation on can help
 

Danb

New Member
Hi Yuri, extrapolation was enabled initially and we still only for a float solution. I turned it off and it made no difference.
 

Danb

New Member
We've tried the auscors with other gear and it has the same issue. We'll see if auscors can help.

Cheers
 
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