PRIMUSr 880 Digital Weather Radar System
Background
Dangers from ground operation of airborne weather radar include the possibility of human body damage and ignition of combustible materials by radiated energy. Low tolerance parts of the body include the eyes and the testis.
Precautions
Management and supervisory personnel should establish procedures for advising personnel of dangers from operating airborne weather radars on the ground. Precautionary signs should be displayed in affected areas to alert personnel of ground testing.
GENERAL
DAirborne weather radar should be operated on the ground only by qualified personnel.
DInstalled airborne radar should not be operated while other aircraft is in the hangar or other enclosure unless the radar transmitter is not operating, or the energy is directed toward an absorption shield which dissipates the radio frequency energy. Otherwise, radiation within the enclosure can be reflected throughout the area.
BODY DAMAGE
To prevent possible human body damage, the following precautions should be taken:
DPersonnel should never stand nearby and in front of a radar antenna which is transmitting. When the antenna is not scanning, the danger increases.
DA recommended safe distance from operating airborne weather radars should be established. A safe distance can be determined by using the equations in Appendix 1 or the graphs of figures 1 and 2. This criterion is now accepted by many industrial organizations and is based on limiting exposure of humans to an average power density not greater than 10 milliwatts per square centimeter.
DPersonnel should be advised to avoid the end of an open waveguide unless the radar is turned off.
DPersonnel should be advised to avoid looking into a waveguide, or into the open end of a coaxial connector or line connector to a radar transmitter output, as severe eye damage may result.
Federal Aviation Administration (FAA) Advisory Circulars | A28- 1146- 102- 00 |
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