Attachment Exhibit A RadHad

This document pretains to SES-LIC-20120221-00231 for License on a Satellite Earth Station filing.

IBFS_SESLIC2012022100231_937640

Exhibit A— Radiation Hazard Analysis

Cobham SATCOM Marine Systems, Sea Tel Products 4030 Nelson Ave., Concord California, 94520 USA T: +1 (925) 798—7979 F: +1 (925) 288—1420 Maximum Safe RF Exposure Power Levels Antenna Antenna Typical Peak Power Nominal Power Max Safe Peak Power Nominal Power Diameter Area BUC Power Density Density BUC Power Density Density Meters cm*2 Watts mW/icm*2 mW/cm‘*2 Watts mW/cm*2 mWicm*2 0.6 2,827 1.8 25 8.8 .6 1 7,854 1.0 75 9.5 0.6 1.2 11,310 22 100 8 .6 1.5 17,671 1.4 150 8.5 ©0.5 1.8 25,447 1.0 9.8 .6 2 31,416 1.6 § 9.5 0.6 24 45,239 1.7 9.9 :06 6 101.788 1.0 1006 9.8 0.6 8797 (2. 30,500 1.6 9.8 0.6 9797 (2.4) 42.450 24 400. 9.4 0.6 Notes: The ‘Peak Power Density‘ values shown above assume a 100 percent duty cycle modulation of the RF power amplifier (BUC) at its maximum possible output power. No satellite network is ever operated at this extreme level. The ‘Nominal Power Density‘ values shown above, represent operation with a 10 percent duty cycle modulation and a 2 dB power backoff (0.1 x 0.63). These are realistic values for operation within a network that accommodates multiple users. The FCC has defined, in document ‘OET Bulletin 65%, the maximum safe exposure level for controlled environments to be 5 mW/cm*2 and the maximum safe exposure level for uncontrolled environments to be 1 mW/cm*2. Clearly, the ‘Typical BUC Power‘ installations meet this requirement with a safety margin of 10. Furthermore, any system equipped with a BUC or RF power amplifier equal to or less than the "Max Safe BUC Power‘ stated above, is guaranteed to be safe outside the confines of the radome walls. By contrast, an analog cellular telephone, with a peak power output of 2 Watts produces a power density, averaged over the area of your head of 20 mW/cm*2. Localized power densities, i.e. next to your ear, can approach 200 mW/cm*2. Digital cellular telephones typically operate with a duty cycle between 1 and 5 percent making the averaged power density equal to or slightly below the FCC defined safe level. Compared to the table values above, a cellular telephone produces between 10 and 100 times the RF exposure level of a typical Sea Tel satellite terminal. Peter G. Blaney Chief Engineer, Sea Tel Products Cobham SATCOM, Marine Systems Doc: 130856_B Sea Tel, Inc., doing business as Cobham SATCOM www.cobham.com


Document Created: 2012-01-31 13:30:18
Document Modified: 2012-01-31 13:30:18
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