I just re-aimed dish to 61.5 from 148 (DishNetwork has a problem getting signal from 148 with 811 receiver). Works good, switched from CBS LA to CBS NY. The signal level is very high buy I have tree marginally in the line of sight (again, no problems). Is the aiming elevation angle, in this case 27 degrees, the real angle of "sight" to the satellite? I thought the actual satellite might be higher and the 27 deg compensate for the angle between the LNB and the dish. Anyone know?