Attachment RadHaz.pdf

This document pretains to SES-LIC-20071031-01484 for License on a Satellite Earth Station filing.

IBFS_SESLIC2007103101484_601068

EXHIBIT A (Page 1 of 3) RADIATION HAZARD STUDY This radiation hazard study describes the R.F. radiation environment of the permanent fixed Ku-band uplink operated by Christian Voice of Central Ohio (CVCO) Inc. This fixed earth station uplink is located at a lattitude of 40d - 02m - 27.9s North and a longitude of 82d - 51m - 43s West, in Gahanna, OH. 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 OET Bulletin No. 65 for aperature antennas. Transmit antenna: Andrew 2.4 meter KU-band R/T antenna Antenna Diameter D 2.4. m Antenna Efficency η 67. % Transmitter: 8 watt output flange SSPA, operated at 50% power Transmit Power P 8. watt. 50. % mw watt P = 4 watt 1000 at 14.0 GHz at 14.5 GHz Antenna Gain G1 49.10 G2 49.30 Wavelength λ1 2.14285. cm λ2 2.06896. cm Calculations for the Near Field (Fresnel Region) Extent of the Near Field 2 2 D D R n1 R n2 4. λ 1 4. λ 2 R n1 = 67.2 m R n2 = 69.6 m Maximum Near Field Power Density 16. η. P Sn 2 π. D mw S n = 0.237 2 cm

Calculations for the Far Field (Fraunhofer Region) (Page 2 of 3) at 14.0 GHz at 14.5 GHz 2 2 0.6. D 0.6. D Distance to Far Field R f1 R f2 λ1 λ2 R f1 = 161.281 m R f2 = 167.04 m G1 G2 10 10 Absolute Gain of Antenna G a1 10 G a2 10 P. G a1 P. G a2 Maximum Far Field Power S f1 S f2 2 2 Density 4. π. R f1 4. π. R f2 mw mw S f1 = 0.099 S f2 = 0.097 2 2 cm cm Calculations for the Transition Zone The farthest point in the near field is the beginning of the transition zone - R t1 R n2 R t1 = 69.6 m The end of the Transition Zone is the beginning of the Far Field - R t2 R f2 R t2 = 167.04 m Beginning End S n. R n2 S n. R n2 Transition Zone Power Density S t1 S t2 R t1 R t2 mw mw S t1 = 0.237 S t2 = 0.099 2 2 cm cm

Calculations at the Reflector Surface: (Page 3 of 3) 2 D Area of Reflector A π. 2 2 A = 4.524 m P Power Density at the S ref 2. Reflector Surface A mw S ref = 0.177 2 cm Calculations between the Antenna and the Ground: Power Density between P S ga Antenna and Ground A mw S ga = 0.088 2 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/cm2 as listed in OET Bulletin No. 65. Thus, this transmit earth terminal meets FCC requirements for human exposure to radio frequency energy.

EXHIBIT B (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, or habitats 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

(Page 2 of 2) 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. 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. Michael Kirk (name) Satellite Engineer (title or position) 10/31/07 (date)

EXHIBIT C (Page 1 of 1) FAA INFORMATION The proposed 2.4 meter Ku band R/T antenna, which is the subject of this application, is a fixed earth station that will be operated from the ground. The maximum height of this antenna will be about 5 meters above the ground. Therefore since the proposed antenna does not extend more than 6 meters above the ground, notice to the FAA is not required pursuant to Section 17.4 of the Commission's rules.


Document Created: 2007-10-31 11:47:09
Document Modified: 2007-10-31 11:47:09
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