Attachment fccradhazFNC48C.doc

This document pretains to SES-LIC-20050308-00289 for License on a Satellite Earth Station filing.

IBFS_SESLIC2005030800289_421292

EXHIBIT A - ANALYSIS OF NON-IONIZING RADIATION, 4.8 Meters HARMFUL LEVELS OF RADIATION WILL NOT EXIST IN REGIONS NORMALLY OCCUPIED BY PERSONNEL. CRITERIA: ANSI SPECIFICATIONS REQUIRE THAT PERSONNEL NOT BE EXPOSED TO LEVELS OF NON-IONIZING RADIATION EXCEEDING 5 mW / cm2. THE FOLLOWING ANALYSES SUPPORT THIS DETERMINATION: FAR FIELD ANALYSIS: ANTENNA DIAMETER = 4.8 Meters ANTENNA GAIN = 48.1 dBi (lin 64,565) LAMBDA = 3*108 Meters / 6.175*109 Hz = 0.048583 EFFICIENCY = η = G/(π*D/λ)2 = 0.67 POWER MAX AT FLANGE = 450 Watts (26.5 dBW) DISTANCE TO FAR FIELD = 2*D2/λ = 46.08 / 0.048583 =948.5 Meters ON-AXIS POWER DENSITY = G*P/4*π*Far Field Distance2 = 64,565 * 450 / 12.56637 * 758,792 = 2.57 W/m2 = 0.257 mW/cm2 LEVEL IS LESS THAN THE 5 mW/cm2 MAXIMUM ANSI LEVEL PERMITTED NEAR FIELD ANALYSIS (Parallel Beam Region & Transition Region): PARALLEL BEAM REGION ANALYSIS: DISTANCE TO END OF PARALLEL BEAM (CYLINDER) REGION: = DIAMETER2 / 2.5 * λ = 23.04 / 0.12146 = 189.7 Meters POWER DENSITY AT END OF PARALLEL BEAM REGION = P / CYLINDRICAL PARALLEL BEAM AREA = 450 / 18.1 = 24.86 W / m2 = 2.49 mW / cm2 LEVEL IS LESS THAN THE 5 mW/m2 MAXIMUM ANSI LEVEL PERMITTED ANTENNA IS MOUNTED 55’ IN THE AIR ON A SECURED ROOFTOP. NO PERSONNEL WILL OCCUPY THE PARALLEL BEAM REGION DURING OPERATION.

Exhibit A-pg2 TRANSITION REGION ANALYSIS: THIS REGION WILL DECREASE INVERSELY WITH DISTANCE BEGINNING AT THE END OF THE PARALLEL BEAM REGION AND WILL NOT EXCEED 2.49 mW / cm2 MAIN REFLECTOR ANALYSIS: = P / REFLECTOR AREA = 450 / 18.1 = 24.8 W / m2 = 2.48 mW/cm2 LEVEL IS LESS THAN THE 5 mW/m2 MAXIMUM ANSI LEVEL PERMITTED. ANTENNA IS MOUNTED 55’ ABOVE GROUND ON A SECURED ROOFTOP. NO PERSONNEL WILL OCCUPY THE MAIN REFLECTOR OR THE FEED TO REFLECTOR REGION DURING OPERATION. RF POWER WILL BE TURNED OFF DURING ANY ANTENNA MAINTENANCE REQUIRING PERSONNEL TO OCCUPY ANY HAZARDOUS REGION BETWEEN THE FEED HORN, SUB-REFLECTOR AND REFLECTOR. PRECAUTIONS WILL BE TAKEN TO VERIFY THAT THE ANTENNA IS NOT POINTING TOWARD ANY POPULATED AREA. PREPARED AND SUBMITTED BY: BASIL F. PINZONE, JR. 03/02/05 TECHNICAL CONSULTANT


Document Created: 2005-03-08 18:31:01
Document Modified: 2005-03-08 18:31:01
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