Which egnos sats to use?

[Badshot]

Ever since they changed sats the bloody signal is absolute shite.
Which is best one to use?
123, 126, 136?
Auto select doesn't seem to work any more, just had twenty minutes waiting for my rtk to come back because the satellite needed fecked off.

 

[drifter]

123 or 136

Realtime | EGNOS User Support Website

egnos-user-support.essp-sas.eu

 

[Robt]

Ever since they changed sats the bloody signal is absolute shite.
Which is best one to use?
123, 126, 136?
Auto select doesn't seem to work any more, just had twenty minutes waiting for my rtk to come back because the satellite needed fecked off.

Rtk doesn’t use Egnos sats? Are are you using egnos instead of rtk? I think you bought your own rtk base?

 

[Badshot]

Rtk doesn’t use Egnos sats? Are are you using egnos instead of rtk? I think you bought your own rtk base?

Correct, just waiting for the frequency to be sent back from case.

Rtk uses sats too, and ever since the egnos ones changed its been less reliable, indeed if left to auto select it's bloody awful.
Trimble must use the egnos sats as it's correction alongside the rtk radio signal.

 

[Farmer Fin]

Soil Essentials advised me just to use 136 for Egnos the other day.

 

[Badshot]

Can't use egnos, it literally drops out every 20m at times.

 

[Robt]

Correct, just waiting for the frequency to be sent back from case.

Rtk uses sats too, and ever since the egnos ones changed its been less reliable, indeed if left to auto select it's bloody awful.
Trimble must use the egnos sats as it's correction alongside the rtk radio signal.

Yes every system uses Sats. Rtk will use both glonass and GPS. The egnos change will have zero affect on rtk sat numbers
Edit, Trimble don’t use egnos for their rtk sats.
why do you need frequency from case? I thought you bought your own base? So shouldn’t you have your own frequency?

 

[Badshot]

Yes every system uses Sats. Rtk will use both glonass and GPS. The egnos change will have zero affect on rtk sat numbers
Edit, Trimble don’t use egnos for their rtk sats.
why do you need frequency from case? I thought you bought your own base? So shouldn’t you have your own frequency?

Yes I have got my frequency from ofcom.

But the radio has to have that frequency formatted into a particular table by a Trimble dealer, and in my case that's CNH, my local dealer isn't classed as a dealer apparently, just a reseller.
That can then be input to the radio, I think I can actually do that bit as I have the program and cabling to connect.
It's like an old boys club, and only members can join in.......

It's totally anticompetitive, and actually ought to go to the competition commission.
IMO all guidance should have to use the same signals, there's way too much duplication going on.
There's now 3 rtk masts along a mile stretch of my home lane.
All different signals.


If Trimble don't use egnos, then it's coincidence that several times a day they just aren't there, plenty of sats, but not the right ones to get a fix.

 

[Badshot]

12.30 the signal dropped to 3 bars.
12.40 it went completely.
12.47 it returned.

Literally not the required sats visible.
Good rtk signal.

 

[Robt]

12.30 the signal dropped to 3 bars.
12.40 it went completely.
12.47 it returned.

Literally not the required sats visible.
Good rtk signal.

This could be so many things. Where is your base station? Does it have a clear view of sky? We’re you working a north facing hill?

 

[Badshot]

This could be so many things. Where is your base station? Does it have a clear view of sky? We’re you working a north facing hill?

Had good signal from the base.
Dead flat field on Romney marsh.
Very Clear view of the sky.
No trees.
Doing it every day I'm using it.
Similar times.
Although today was the first time I actually looked at the time .

 

[Northern farmer]

The issue should not be too low number of GNSS satellites. See the graph for today at your location. Not sure if your receiver supports Galileo and Beidou but GPS + Glonass should be more than enough at an open sky position.

If you had a good RTK correction signal, sounds more like some hardware issue.

I'm confused about the Egnos satellite discussion. As Robt says, the receiver would ignore Egnos completely when running on RTK.

 

[Badshot]

Perhaps it's a setting then.

It's set to use sbas and sbas + in the correction, it can use beidou and gallileo too from memory.

Maybe it needs the sbas + unchecking?
I'll try it tomorrow.

All I know is it's damned annoying when it's not there.

 

[Robt]

I’m really confused! Sbas and sbas + is a sat based correction.
1) what is set to sbas
2) is your rtk base radio actually running and are you receiving messages from it? ( it will give you a distance to base and time since last message )
Everything you describe suggests you are using sat based correction source at the receiver ( tractor ) rather than rtk

 

[Badshot]

I’m really confused! Sbas and sbas + is a sat based correction.
1) what is set to sbas
2) is your rtk base radio actually running and are you receiving messages from it? ( it will give you a distance to base and time since last message )
Everything you describe suggests you are using sat based correction source at the receiver ( tractor ) rather than rtk

In the settings for sbas it's set as I said above.

I'm running in the rtk setting. Using xfill to cover any loss of rtk sig
Yes I'm getting signal.
Approximately 22km from the base I'm currently using until case pull their finger out and create the frequency table for me to upload into the TDL450L radio transmitter, it's not possible to just input a frequency, they have to create the fecking thing in some special fecking table format.

It can only be lack of satellites, the rtk is there, I check it when it drops out.
It's dropping out at the same time roughly.

Just as when I first tried egnos ,many years ago, it just dropped out around dusk every day.
So perhaps it's just some sort of interference, I don't know, but I can guarantee it's not there

 

[Northern farmer]

Can you get the caster table of your current base? Wonder if it is broadcasting proper dual frequency, multiconstellation corrections. If it was only L1, you would keep dropping at 22 km distance.

 

[Badshot]

I know it's a Trimble base.
It's clear line of sight to the base which is set high on a hill compared to at sea level.
Why would it drop at the same time though?

 

[Northern farmer]

OK, sounds like good base and not causing the odd behaviour.

 

[clbarclay]

I though Trimble use their own RTX satellites for Xfill backup corrections with their RTK, not egnos?

 

[Badshot]

It managed to not drop out today.
Only dropped to 4 bars.