In some parts of the world, (including the southwest US), a goodly fraction of the localizers have an expanded service volume (ESV), often quite a bit larger than the standard service volume you see in the AIM.
The code in navradio.cxx has been ignoring the service volume information in the database and wrongly assuming the default values applied everywhere. A patch to fix the range-related part of the problem can be found at: http://www.av8n.com/fly/fgfs/service-volume.diff ... but alas there are other service volume issues. The code has no understanding of how azimuth affects the localizer. There is more to the story than reception *range*. It is perfectly possible to be outside the LOC service volume for reasons having to do with azimuth, not range. Good ident will be heard, but false localizer courses will cause serious trouble for the unwary pilot. Similar remarks apply to false glide slopes. The patch does not address these non-range issue. The code would need to be significantly restructured to deal with this. ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
