Attachment Exhibit C

This document pretains to SES-MOD-20101216-01583 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2010121601583_857063

Exhibit Number B - Radiation Hazard Analysis ANALYSIS OF NON-IONIZING RADIATION FOR A 3.8 METER EARTH STATION Completed: 12/02/2010 This report analyzes the non-ionizing radiation levels for a 3.8 meter earth station. It is the purpose of this report t determine the power flux densities of the earth station at the antenna surface, near field, far field, and the transition region. Results are summarized in Table 1 on page 4. The Office Engineering & Technology Bulletin, No. 65, August 1997, specifies the following Maximum Permissib Exposure (MPE) levels for non-ionizing radiation : 1. Occupational/Controlled Exposure is 5mW/cm² (five milliwatts per centimeter squared) over an average time of 6 (six) minutes. 2. General Population/Uncontrolled Exposure is 1mW/cm² (one milliwatt per centimeter squared) over an average time of 30 (thirty) minutes. The following parameters were used to calculate the various power flux densities for this earth station: Location: Dillingham Earth Station, Alaska Latitude: 59.04 °N Longitude: 158.46 °W Operating Frequency: 6175 MHz Wavelength (λ) 0.0485 meters Antenna Diameter (D): 3.8 meters Antenna Area (A): 11.34 meters² Transmit Antenna Gain: 46.1 dBi Transmit Antenna Gain (G): 40738.0 numeric Maximum 1° Off Axis Gain 29.0 dBi Maximum 1° Off Axis Gain (G1°) 794.3 numeric Antenna Efficiency (η): 0.674 numeric Feed Power (P): 200 Watts Exhibit B Page 1 of 4


Document Created: 2010-12-02 14:25:27
Document Modified: 2010-12-02 14:25:27
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