NS-HP Firmware Update (SBAS, BDS, Float RTK, GPGST)

[Jason Lin]

Interesting feedback from a user on the use of new Float RTK mode:

I have tested one sample with low cost patch antenna and baseline 14km. Recover got stable float RTK mode. 20cm accuracy it's perfect for agriculture.

[alexey.bogatyryov]

Great update, more stable and very useful sentence PSTI,032 with information about baseline.
Would be useful to add indicator "Baseline" to NavSpark RTK Viewer.

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[Jason Lin]

We are working on adding additional RTK related information to GNSS Viewer. Will release soon this month.

[Jason Lin]

New GNSS Viewer update on web-store RESOURCE page now shows additional RTK information.
http://navspark.mybigcommerce.com/content/GNSS_Viewer.zip

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[jshuerga]

I've got the 25$ tri-band active antenna. Does it cover SBAS frecuency bands? When I enable the SBAS system (EGNOS), GNSS viewer always shows the same amount of satellites that when I disable the SBAS system.

[Jason Lin]

SBAS has same frequency as GPS. so the antenna covers it. Using the latest firmware update for NS-HP, user don't need to do anything it'll automatically use SBAS (WAAS or EGNOS). Can you post a screen image capture of what you see to better understand what problem you are referring to?

[Jason Lin]

SBAS has same frequency as GPS. so the antenna covers it. Using the latest firmware update for NS-HP, user don't need to do anything it'll automatically use SBAS (WAAS or EGNOS). Can you post a screen image capture of what you see to better understand what problem you are referring to?

[alexey.bogatyryov]

Could you please explain

GST – GNSS Pseudorange Error Statistics 


$GPGST for DGPS mode unit of measure is meter.
What is unit of measure in Float RTK and RTK Fix ?
centimetre?

[Andrew Hsu]

Hi,

Unit of measure is meter.
GPGST error estimate message is described in http://navspark.mybigcommerce.com/conte ... RTK_v5.pdf page 19.

Andrew

[alexey.bogatyryov]

Ok, thank you for link, of course we are using this document.

Why GPGST worse for FLOAT RTK than for DGPS ?

DGPS 0.417 - 40 cm error
FLOAT RTK 1.842 - 1m 84 cm error
RTK 0.021 - 2cm error

in this case first and third values is correct.
FLOAT RTK all time shows 2m-20m error worse than DGPS. but in fact FLOAT RTK has decimetre accuracy.

exampleDGPSvsFloatvsRTK_nmea.txt

example of float rtk with poor standard deviation 

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