NavCom SF-3050 Rev.E - Manual (Page 175)

SF-3050 GNSS Product User Guide
– Rev E
B-149
Base Antenna Radiation Pattern
Figure 81: Base GNSS Antenna Radiation Pattern
Optimal antenna performance is realized at
elevations greater than 35º.

There is an 11dB variation between 15º and
90º elevation (factor >10x); therefore, lower
elevation satellites are always more difficult to
track.

There is a 9dB variation between ~35º and 0º
elevation (factor >8x)