Important: These forums are for discussions between SkyDemon users. They are not routinely monitored by SkyDemon staff so any urgent issues should be sent directly to our Customer Support.

VOR radials north reference


Author
Message
cloudless
c
Too Much Forum (78 reputation)Too Much Forum (78 reputation)Too Much Forum (78 reputation)Too Much Forum (78 reputation)Too Much Forum (78 reputation)Too Much Forum (78 reputation)Too Much Forum (78 reputation)Too Much Forum (78 reputation)Too Much Forum (78 reputation)
Group: Forum Members
Posts: 8, Visits: 18
Hi everyone,

new SkyDemon user here.

I'm a bit confused because the way I learned VORs is that they are referenced to magnetic north. At least to a certain amount, as they are not updated every time the variation changes.

But it seems SkyDemon defaults to referencing them to something else? For example, see the KRH VOR in south-west germany:


On the right side is an ICAO chart pulled from DFS AIS with the 360° radial in red and the SkyDemon one copied from the left picture in black.

The one from skydemon
a.) doesn't match with the one provided by the DFS
b.) isn't directly 360° true north either, it seems more like 355° or something
c.) the difference between them could be the variation (something link 2-3° here)

So is the data of the VOR wrong?

I had expected SkyDemon to provide, display and reference radials of VORs according to "magnetic". In parenthesis because, as noted above, their might be a slight discrepancy by the VORs not always updating their reference with every variation change.

Thanks for the clarification,

cloudless

Reply
grahamb
grahamb
Too Much Forum (8.7K reputation)Too Much Forum (8.7K reputation)Too Much Forum (8.7K reputation)Too Much Forum (8.7K reputation)Too Much Forum (8.7K reputation)Too Much Forum (8.7K reputation)Too Much Forum (8.7K reputation)Too Much Forum (8.7K reputation)Too Much Forum (8.7K reputation)
Group: Forum Members
Posts: 595, Visits: 29K
cloudless - 8/22/2022 9:58:46 AM
Hi everyone,

new SkyDemon user here.

I'm a bit confused because the way I learned VORs is that they are referenced to magnetic north. At least to a certain amount, as they are not updated every time the variation changes.

But it seems SkyDemon defaults to referencing them to something else? For example, see the KRH VOR in south-west germany:


On the right side is an ICAO chart pulled from DFS AIS with the 360° radial in red and the SkyDemon one copied from the left picture in black.

The one from skydemon
a.) doesn't match with the one provided by the DFS
b.) isn't directly 360° true north either, it seems more like 355° or something
c.) the difference between them could be the variation (something link 2-3° here)

So is the data of the VOR wrong?

I had expected SkyDemon to provide, display and reference radials of VORs according to "magnetic". In parenthesis because, as noted above, their might be a slight discrepancy by the VORs not always updating their reference with every variation change.

Thanks for the clarification,

cloudless

Does it matter if the VOR roses are not exactly oriented? You're hardly going to plot a line from them with a chinagraph pencil are you? Tongue To me, the compass rose's only purpose on a moving map app is to draw your eye to the location of the VOR.

Edited 8/22/2022 4:39:55 PM by grahamb
GO

Merge Selected

Merge into selected topic...



Merge into merge target...



Merge into a specific topic ID...




Threaded View
Threaded View
cloudless - 8/22/2022 9:58:46 AM
grahamb - 8/22/2022 4:06:04 PM
cloudless - 8/22/2022 8:08:23 PM
                         I just find it surprising that you would actually use the VOR rose to...
grahamb - 8/23/2022 5:18:03 AM
cloudless - 8/23/2022 7:11:06 AM
                         Some tests show that the VOR's are referenced to the magnetic north....
pgroell - 8/23/2022 9:42:25 AM
Tim Dawson - 8/23/2022 11:05:23 AM
cloudless - 8/23/2022 3:37:41 PM
Tim Dawson - 9/13/2022 1:46:00 PM

Reading This Topic

Login

Explore
Messages
Mentions
Search