First Test

Reach RS / RS+ Getting started
1

Hi Igor

I’ve made the first test today, with best-known CP (Control Point) to make a comparison.

The first point had a fix and the difference in lat/long is 3,0/2,4 cm. The GCP coordinates have a precision of 7,0/7,0 cm.

Then, with other points, I couldn’t reach the fix (more than 20 minutes). What can be the problem?

I use the Swipos caster: do I have to consider the “base mode” in Reach RS app? Or not?

I think to have used the default setting in the app.

Best Raguards

2

Hi i8gnss
Is it possible to provide raw data (* .ubx) for this 20-minute session?
We are at the stage of developing a pre-processing progam in which the user will be able to remove signal interference. It will take some time but this test example can be useful.
Regards

3

Hi Ryszard
Here the raw data of the first measure and of the second. I’ve tried to measure with Swipos (Switzerland) and with Spin Gnss (of the near Italy).

Normally can I have real time position data or do I have to post processing to have the precision of 1 cm?

Best Regards

raw_201801030852_UBX.zip (1.9 MB)
raw_201801031024_UBX.zip (4.4 MB)

4

Hi,
There are no disturbances in this session. For a precision of 1 cm, it is required to use VRS (NTRIP or postprocessed RTN). You can order such a VRS in SWIPOS. I checked only the quality of the measurement, which is OK.
On the evidence of two reports: Report_StaticIGS_i8gnss.pdf (176.1 KB) i8gn0030.pdf (104.5 KB)
My advice is to order VRS and calculate rtkpost. This should explain the reasons for failure.
Best regards
Ryszard

5

Hi
As I wrote, I used Swipos VRS_GISGEO but, except the first survey, with the others was not possible to reach Fix. Did you see that problem?

6

Hi
To finish this thread, I generated VRS_IGS (30 sec. interval). The conclusion is that only GPS satellites give correct results. It looks like there was operator interference during the session (a few times) :slight_smile:
Best regards
Ryszard
Report_RTN_IGS_i8gnss.pdf (499.0 KB)
vrs10030.pdf (125.0 KB)

7

Hi,

You should be able to get the cm accuracy in real-time.

How long was the baseline? Did you make sure that Glonass AR was set to “off” for working with NTRIP?

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