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4-68
Garmin G500 Pilot’s Guide
190-01102-02 Rev. B
Foreword
Sec 1
System
Sec 2
PFD
Sec 3
MFD
Sec 4
Hazard
Avoidance
Sec 5
Additional
Features
Sec 6
Annun.
& Alerts
Sec 7
Symbols
Sec 8
GlossaryAppendix A
Appendix B
Index
Figure 4-58 Angle of Incidence
A smaller incident angle gives the radar a larger detectable range of opera-
tion and the target display will show a higher intensity. Since more radar
energy is reflected back to the antenna with a low incident angle, the resulting
detectable range is increased for mountainous terrain.
4.8.3 Operating Distance
The following information establishes a minimum safe distance from the
antenna for personnel near an operating airborne weather radar. The minimum
safe distance is based upon the FCC’s exposure limit at 9.3 to 9.5 GHz for gen-
eral population/uncontrolled environments which is 1 mW/cm
2
. See Advisory
Circular 20-68B for more information on safe distance determination.
Maximum Permissible Exposure Level (MPEL)
The zone in which the radiation level exceeds the US Government stan-
dard of 1 mW/cm
2
, is the semicircular area of at least 11 feet from the 12
inch antenna as indicated in the illustration below. All personnel must remain
outside of this zone. With a scanning or rotating beam, the averaged power
density at the MPEL boundary is significantly reduced.