The Digitrak autopilot project is coming along. I have the first mode running, which captures and holds the GPS track. I get the GPS heading to feed to the autopilot controller from the default GPS instrument. The autopilot is set to reduce the GPS bug error to zero by driving the aileron until the orientation roll equals the target roll. This works fine, however, I notice some differences in the numbers reported by the heading and track properties.
/orientation/heading-deg 270 /orientation/heading-magnetic-deg 282 /instrumentation/gps/indicated-track-true-deg 258 /instrumentation/gps/indicated-track_magnetic-deg 269 I noticed that the orientation values do not update continuously as the gps ones do, so I checked this again to make sure the difference was there. I think they must be correct because the autopilot is holding on course 270 with only fractional deviation seen in the GPS track. I may be a dummy, but can anyone explain this? Not the variation between true and magnetic, but between GPS and orientation. Is it GPS error being simulated? Is it simulating the local magnetic deviation between compass and GPS headings? Thanks, Steve _______________________________________________ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
