NavCom SF-3050 Rev.I - Manual (Page 145)

SF-3050 GNSS Product User Guide – Rev I
B-126
Rover/Airborne Antennae Radiation Pattern
Figure 115: Rover/Airborne GNSS Antenna Radiation Pattern
Optimal antenna performance is realized at elevations greater than 25º.
There is a 10dB variation between 0º and 90º elevation (factor 10x); therefore, lower
elevation satellites are always more difficult to track.
There is a 5dB variation between ~35º and 0º elevation (factor >3x)
Figure 116: Base (P/N 82-001021-3001LF) Antenna Dimensions