Thx William Eng, but I still having a problem to catch the Galaxy 25 bird. Now my question is which Azimuth do u use when u set up the dish (the true AZ or the margin AZ ??? In my cases i have = Azimuth (true): 144.0°;; and Azimuth (magn.): 130.7° using Compass) so which one do I need to use for setup my dish?

Thanks for your help.