Attachment RadHaz Study

This document pretains to SES-MOD-20101203-01497 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2010120301497_854908

Arqiva Inc. Washington, DC ANALYSIS OF NON-IONIZING RADIATION FOR A 4.5 METER KU BAND EARTH STATION This report analyzes the non-ionizing radiation levels for an earth station antenna. The OET Bulletin 65, Edit. 97-01, August 1997, Evaluating Compliance with FCC Guidelines for Human Exposure to Radio frequency Electromagnetic Fields specifies that the maximun level of non-ionizing radiation that a person may be exposed to cover a six minute period is an average power density equal to 5 mw/cm2 in a controlled environment. For the general population, a person may be exposed to cover a thirty minute period is an average power density equal to 1mw/cm2 in an uncon- trolled environment. It is the purpose of this report to determine the power flux densities of the earth station surface area, in the near field, transition region and far field. P=Antenna Power(watts), G=Antenna Gain(db), D=Antenna Diameter(meters) F=Ctr Frequency(gHz), Wl=WaveLength(meters) Antenna Surface(m2) A=3.14*D2/4 Antenna Surface Density(w/m2) Ss=4*P/A Wavelength Wl(m)=3/(F*10) Near Field Region Rnf(m)=D2/(4*Wl) Near Field Region Density Snf(m/m2)=16*.6*P/(3.14*D2) Transition Region Rff(m)=.6*d2/Wl Transition Region Density St(w/m2)=Snf*Rnf/Rff Far Field Region Sff(m)=P*G/(4*3.14*Rff) Earth Station Radiation Hazard Calculations Freq(ghz)= 14.0 Power(w)=-14.0 AntGain(db)= 53.6 AntSize(m)= 4.5 Wavelength(m)= .021 Antenna surface(m2)= 15.9 AntSurfDen Ss(w/m2)= -3.52 Ss(mw/cm2)= -.35 Near-Field Region Rnf(m)= 236.25 Near-Field Den Snf(w/m2)= -2.29 Snf(mw/cm2)= -.23 Transition Region Rff(m)= 567.0 Tran Region Den St(w/cm2)= -.95 St(mw/cm2)= -.10 Far Field Region Sff(w/cm2)= .00 Sff(mw/cm2)= .00 ANALYSIS RESULTS LIMITS - 1mw/cm2 Uncontrolled, 5mw/cm2 Controlled Antenna Surface Density Ss(mw/cm -.352 No Potential Hazard, < Limit Near Field Density Snf(mw/c -.229 Transition Region St(mw/cm -.095 Far Field Density Sff(mw/c .000 For a minimum elevation angle of 16.0(deg) and a object height of 8.0(ft) For radiation non-hazard, the minimum distance to object= 44.3(ft)

Prepared by: TELE-SCI SOLUTIONS P.O. Box 237 Augusta, NJ 07822-0237


Document Created: 2010-12-03 14:18:39
Document Modified: 2010-12-03 14:18:39
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