ILS approach off-axis at SBSJ

Navigation Data Airport Scenery
1

The ILS axis of runway 16 at São José dos Campos (SBSJ) is displaced about 5 meters to the left of the runway, not following its central axis in Flight Simulator 2020.

2

Hi,
you are talking about the stock scenery of SBSJ, correct? So no 3rd party scenery?

Cheers
Richard

3

Yes, there is the scenery, including myself who created it, but it is incorrect even in the default version, without my modification. The course of the locator, which I adjusted, is to the left of the track.

4

Here is a video of how it is in the default scenery. If you want and are willing to help, I can send you the settings for the locator to work correctly. Note: I did this following the data I obtained from real life.

5

And this is the corrected version with the right coordinates. Note that my scenario was created based on real data and is in the same position as the default scenario track. If fixed for one, it will be fixed for all.

Here are the corrected coordinates that have been adjusted:

<Ils lat="-23.23958128139476" lon="-45.85033102008938" alt="628.77433932572603" end="SECONDARY" range="27780.00000000000000" ident="ISJ" magvar="22.000000" heading="157.00000000000000" frequency="110.30000000000000" name="SBSJ-R16-ILS" backCourse="FALSE">
    <Dme lat="-23.24004869459647" lon="-45.85076805578097" alt="626.97335081454366" range="27780.00000000000000"/>
    <GlideSlope lat="-23.22183961043327" lon="-45.86829569759328" alt="623.95547161344439" pitch="3.000000" range="18520.00000000000000"/>
</Ils>
6

Hi,
I have compared the ILS antenna position with the AIP Brazil:

Loc antenna 16: -23.23905556 / -45.84997222
GS antenna 16: -23.2227778 / -45.87061111
DME antenna 16: -23.2395 / -45.8503333

Here the reference from the AIP Brazil:

image
image1753×1194 288 KB

Your values are slightly different to the AIP values but you wrote that you values are based on the real-data. Can you forward us a link to the real-data what you´re using?

Thank you,
Richard

7

It seems the Loc16 antenna position as provided by the Brazilian AIP is grossly inaccurate. This may well be the cause of the problem.

Wrong_SBSJ_Loc16_position
Wrong_SBSJ_Loc16_position1067×714 203 KB

A better estimation from Google Earth (red circle) is
lat=-23.239611 long=-45.850333
Hope it could help

Hervé

8

Thanks Herve, yep but we can’t/may not really change the coordinates, when the coordinates are confirmed in the AIP.

So, it’s an issue from the AIP Brazil - @gordela please report this issue to the goverment of Brazil, that they can correct it.

Cheers
Richard

9

Perfectly understandable
Now, considering there’s quite a lot of AIP inaccuracies in some countries (Brazil is one of them), 3rd party scenery designers can still correct them by themselves using either alignment calculations or available satellite images