On 7/2/07, K. Hoercher <[EMAIL PROTECTED]> wrote: > You can see this if you enable the showing of a tacan source in the > radar and its corresponding data/symbol whatever box. They appear to > "point" into different directions. I suspect both informations get > derived by ways taking the magnetic variation into account > differently.
I haven't looked at the radar stuff yet, so I'm just going from what you've said here. VORs are slaved to a certain variation, presumably the magnetic variation at the time they were put into service (or last updated). But as the magnetic variation in any place changes over time, the VOR variation can differ (sometimes substantially) from the compass heading. Not sure if that's related to the problem you're seeing, but FYI. > The combinations of radar echos/groundradar/radar compass rose look > pairwise consistent though. But on further guesstimating I tend to > think all that rl atc happens with the magnetic heading in mind (thus > rwy 28 in KSFO for example), so perhaps the radar screen should > reflect this by rotating accordingly. I'm not even sure if that would > change the difference I talked above (and if so, in the "right" way). IANAATC but I know the headings given out over the air by ATC and ATIS, etc. are all magnetic, so you're possibly right. If nobody else has ATC experience or friends, I have a former ATC acquaintance I could ask any questions to. ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
