> If all your samples cover a range of less than two quadrants then I don't= think there is a problem with simply averaging the angles? =A0If the sampl= es cross the 0/360 degree problem area then just rotate 90 degrees before a= veraging and then rotate back afterwards. I don't know what his app is, but in mine there was NO way I could guarantee that. It's very common to have wild bearings even 180 degrees out in a doppler DF system. Reflections and RF paths vary widely especially when mobile, and perversely you usually get better overall bearing quality when moving. If it works for him, it works.. It wouldn't have worked for me. I chewed on that one for a while before deciding to bite the bullet and do it the formal way. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .