Safe Operating Distance - Garmin Socata TBM850 Pilot's Manual

HAZARD AVOIDANCE
A smaller incident angle gives the radar a larger detectable range of operation and the target display shows
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.

SAFE OPERATING DISTANCE

The following information establishes a minimum safe distance from the antenna for personnel near
operating weather radar. The minimum safe distance is based on the FCC' s exposure limit at 9.3 to 9.5 GHz for
general population/uncontrolled environments, which is 1 mW/cm2. 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 standard of 1 mW/cm2 is the semicircular
area of at least 9.16 feet from the 10-inch antenna. 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.
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Figure 6-97 Angle of Incidence
Garmin G1000 Pilot's Guide for the Socata TBM 850 190-00709-04 Rev. A