Vatsim: 200-300 feet off although realistic temp effects are off

[Floater]

Good morning. 
Last night, as well as right now, I was told by ATC that I am 200ft below my assign alt when, according to the Aircraft, I am at level. 
The realistic temp effect on the altimeter are OFF.  Baro setting is standard. I have already tried to create a new airframe, no effect
Any ideas?
thanks. 
 

 

Edited March 20, 2022 by Floater

[L1ntzi]

Hello, I had this very same situation yesterday evening while flying in VATSIM.

[Floater]

Do we have Vatsim ATC`s here? 
Amsterdam told me this happens about 2 times per session but it can also be the other way around: two aircrafts seperated by 1000ft on the radar are getting TCAS alerts. maybe there was an update to Euroscope?

[JJM]

What weather injector are you using, if any?

[Floater]

I am using Active sky. It had not caused problems so far

[FYG001]

I was online with VATSIM in NW EUR yesterday as well, also using ASXP, and no complaints from ATC on level /altitude. 

[Floater]

I also never had this Issue it seemingly just poped up.
After I was notified my ATC I also tried to set the complex altimeter simulation on active, just to test. I was making things waaay worse

Edited March 20, 2022 by Floater

[ois650]

I flew on Vatsim a couple of days ago with no complaints from ATC. I also tested it using the ATC client Euroscope. There should be no issues and any disparities are likely on the ATC side of things. 

FWIW X-Plane 12 will have realistic atmospheric simulation so ATC folks will have to fully fix things on their end eventually. 

Brgds

[Pils]

1 hour ago, Floater said:

I also never had this Issue it seemingly just poped up.
After I was notified my ATC I also tried to set the complex altimeter simulation on active, just to test. I was making things waaay worse

What version of the CL-650 are you using? Can you post your Log.txt, please?

[Floater]

I am pretty sure I am on the newest version. Anyway,my log from this morning :-)

Log.txt

[Floater]

I just did some test with an ATC: The first screenshot are my settings. The second one is his radar. I am indicated -100ft. when tempreture effects are off. If I switch them on, I am descending a bit and therefore end up at -300ft

I just remember somthing: it started after I used better pushback for thw first time in the CL650.
The tug connected, I got a pull up warning and the alt tape was winding down a few 100 ft

Update: on local QNH the alt matches. on standard I am off by 100-300ft 

Edited March 21, 2022 by Floater

[L1ntzi]

Today I flew (offline) and I noticed the same altitude difference between CL650 altimeter and X-Plane's own alt ind -variable. I also recycled few times the altimeter between local and std QNH with X-Plane's own command, but the difference between CL650 altimeter and X-Plane's own altitude did not change. Please see the picture below. I've also attached the Log.txt.

I'm using HS CL650 1.4r1 and ASXP 7618.

Log.txt

Edited March 23, 2022 by L1ntzi

[Floater]

That's pretty much the amount ATC says I am off by 

[ois650]

20 hours ago, L1ntzi said:

Today I flew (offline) 

If you're flying offline then realistic atmosphere is enabled and there will be a difference between XP's altitude output and the Challenger's indicated altitude. 

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This is being looked into and any updates will be posted here. Seeing as this issue was fixed in the first update this is quite unusual. 

[Pils]

Is it possible to get the values of the barometer_setting datarefs from X-Plane, please? Plus the altitude readouts as above. @L1ntzi

[L1ntzi]

20 hours ago, Pils said:

Is it possible to get the values of the barometer_setting datarefs from X-Plane, please? Plus the altitude readouts as above. @L1ntzi

Sure! On Friday I flew one test flight on Vatsim and on that flight at cruise alt_ind was showing 36 040 ft while CL650's altimeter was at 36 000 ft. I recycled the QNH-settings with both the CL's own altimeter knob and with XP's keybinded command. The difference did not change.

This evening I flew one flight on Vatsim and checked also those datarefs as requested. Now there wasn't a major difference between alt_ind and CL's altimeter (please see the attachment below). I'll continue to observe if I come across again with this error and post you then Log.txt with the requested datarefs and altitude readouts.

Thanks for following up with this.

[L1ntzi]

Another flight's data from today, 85 ft difference. Please see the screenshot below and Log.txt attached.

Log.txt