Attachment RF Hazard Study

This document pretains to SES-MSC-20121115-01024 for Miscellaneous on a Satellite Earth Station filing.

IBFS_SESMSC2012111501024_975220

(Page 1 of 2) ENVIRONMENTAL IMPACT STATEMENT Transmit/Receive In regard to Section 1.1307(a) of the Commission‘s rules: This site is not in a designated wilderness area or wildlife preserve; it does not threaten endangered species or critical habitats; nor does it affect sites, structures, orhabitats which are significant in American history, architecture, archeology, engineering or culture that are listed or are eligible for listing in the National Registry of Historic Places; it does not affect Indian religious sites or flood plains; nor does it cause significant change in wetland fill, deforestation, or water diversion. In regard to section 1.1307(b) of the Commission‘s rules: We have prepared the calculations of radio frequency radiation for this transmitter and antenna combination, under the operating conditions specified in this application, with these results: Region Radiation level Hazard assessment | (mw/cm2) Near field 0.237 Complies with guidelines Far field 0.099 Complies with guidelines Transition zone 0.237 ~___Complies with guidance At reflector surface 0.177 Complies with guidance Between the rim of the 0.088 Complies with guidance antenna and the ground Conclusions: Based on the study, which is summarized above, we conclude that in the regions of concern, the radiation level complies with the guidance; the level is less than 5 milliwatts per square centimeter.

(Page 2 of 2) Accordingly, this action does not have a significant environmental impact as described in the Commission‘s rules and does not require the preparation of an environmental assessment.

(Page 1 of 3) RADIATION HAZARD STUDY This radiation hazard Study describes the R.F. radiation environment of the uplink installed by WRVO. This uplink is located at a latitude of 43 d 27 m 07 s North and a longitude of 76 d 32 m 40 s West, in Oswego, NY. This study is done to comply with the requirements of Section 1.1307(b) of the rules of the Federal Communications Commission. All calculations conform to the proceedures presented in OST Bulletin No. 65 for aperature antennas. Transmit antenna: Prodelin 2.4 meter KU—band Antenna Diameter D 2.4 +m Antenna Efficency n — 67:% Transmitter: Anacom 8 watt output flange SSPA, operated at 50% power Transmit Power P — 8: watt 50 :% mw / watt P mm 4 .Watt 1000 at 14.0 GHz at 14.5 GHz Antenna Gain G ; —49.10 G , — 49.30 Wavelength A 1 = 2.14285—cm A , = 2.06896—cm Calculations for the Near Field (Fresnel Region) Extent of the Near Field 2 ~ 2 D D Rpp + —— Ey3 + o. 4) 1 49 Rnl = 67.2 —m Rn2=69.6-m — Maximum Near Field Power Density 16 n—P S n t ——3~ 1D | _ mw S p =0.237 — Cmm

Calculations for the Far Field (Fraunhofer Region) | (Page 2 of 3) at 14.0 GHz at 14.5 GHz | | 0.6D 0.6 D Distance to Far Field K gj + ——— Rq = A 1 A #2 R ;1 =161.281 —m R ) =167.04 .m Gj G> . 10 10 Absolute Gain of Antenna G qq — 10 G q7 = 10 Maximum Far Field Power $ pp — ~—— «5 § pqp s —_._._. 3 Density 4 mR fj | 4 mR p mw mw cm"~ cm Calculations for the Transition Zone The farthest point in the near field is the beginning of the transition zone — Rpy — 8p2 R t1 = 69.6 .m The end of the Transition Zone is the beginning of the Far Field — Rp — Rp Beginning End Transition Zone Power Density q _ S nR n2 $un — " *A a2 1 > ORaup t2 _fi‘“—_‘ t1 t2 $ q =0237 2", S 12 =0.099 2 Cm CImM

Calculations at the Reflector Surface: (Page 3 of 3) D Area of Reflector (f A =4.524 -m . / P\ Power Density at the S ref c fK ) Reflector Surface mWw S ref ~ 0.177 . —~3 cm Calculations between the Antenna and the Ground: Power Density between 5 I_) Antenna and Ground g4 A mw S ga = 0.088 ‘~¢3 cm Conclusions The power densities in the Near Field, Far Field, Transition Zone, at the Surface of the Reflector, and between the Reflector and the Ground are all below the allowable limit. Nowhere do they exceed the level of 5 mw/cm? as listed in OST Bulletin No. 65. Thus, this transmit earth terminal meets FCC requirements for human exposure to radio frequency energy.


Document Created: 2012-11-15 13:26:45
Document Modified: 2012-11-15 13:26:45
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