Attachment Exhibit C

This document pretains to SES-AMD-20150211-00073 for Amended Filing on a Satellite Earth Station filing.

IBFS_SESAMD2015021100073_1076096

ISAT US Inc. FCC Form 312 Exhibit C Response to Question Q28 1. Radiation Hazard Analysis for the antenna manufactured by Intellian, model: GX60 This section analyzes the non-ionizing radiation levels for the Intellian GX60 earth station included in this application. The analysis and calculations performed in this Exhibit comply with the methods described in the FCC Office of Engineering and Technology Bulletin, No. 65 first published in 1985 and revised in 1997 in Edition 97-01. Bulletin No. 65 and the FCC R&O 96-326 specifies two Maximum Permissible Exposure (MPE) limits that are dependent on the situation in which the exposure takes place and/or the status of the individuals who are subject to the exposure. These are described below: • General Population/Uncontrolled environment MPE limit is 1 mW/cm2. The General Population / Uncontrolled MPE is a function of transmit frequency and is for an exposure period of thirty minutes or less. • Occupational/Controlled environment MPE limit is 5 mW/cm2. The Occupational MPE is a function of transmit frequency and is for an exposure period of six minutes or less. The analysis provided in this report determined the power flux density levels of the earth station in the 1) far-field, 2) near-field, 3) transition region, 4) region between the feed and main reflector surface, 5) at the main reflector surface, and 6) between the antenna edge and the ground. Section 1.1 – Detailed calculations Input Parameter Value Units Symbol Antenna Diameter 0.65 m D Antenna Transmit Gain 43.9 dBi G Transmit Frequency 30000 MHz f Antenna Feed Flange Diameter 4 cm d Power Input to the Antenna 5 Watts P Calculated Parameter Value Units Symbol Formula Antenna Surface Area 0.3318 m² A πD²/4 Area of Antenna Flange 19.2437 cm² a πd²/4 Antenna Efficiency 0.5887 real η gλ²/(π²D²) Gain Factor 24547.0892 real g 10^(G/10) Wavelength 0.0100 m λ 300/f

Antenna Field Distances Calculated Parameter Value Units Symbol Formula Near-Field Distance 10.5625 m Rnf D²/(4λ) Distance to Far-Field 25.35 m Rff 0.6D²/λ Distance of Transition Range 10.5625 m Rt Rt=Rnf Power Flux Density Calculated Parameter Value Units Symbol Formula Power Density in the Near Field 3.5483 mW/cm² Snf 16ηP/(πD²) Power Density in the Far Field 1.5199 mW/cm² Sff gP/(4πRff²) Power Density in the Transition Region 3.5483 mW/cm² St Snf*Rnf/Rt Power Density at the Feed Flange 1039.3038 mW/cm² Sfa 4P/a Power Density at Main Reflector 6.0273 mW/cm² Ssurface 4P/A Power Density between Reflector and Ground 1.5068 mW/cm² Sg P/A Section 1.2 – Summary of Results Region Calculated Limit Controlled Limit Uncontrolled Power Environment Environment Density ≤ 5 mW/cm2 ≤ 1 mW/cm2 (mW/cm2) Near Field 3.5483 meets limit exceeds limit Far Field 1.5199 meets limit exceeds limit Transition Region 3.5483 meets limit exceeds limit Feed Flange 1039.3038 exceeds limit exceeds limit Main Reflector 6.0273 exceeds limit exceeds limit Between Reflector and Ground 1.5068 meets limit exceeds limit As summarized in the above tables, the Intellian GX60 antenna meets the FCC’s MPE levels for controlled environments except for at the feed flange as well as at the main reflector. Since the antenna will be enclosed within a radome, these areas will not be accessible while the antenna is in operation. Training of personnel with access to the antenna would include consideration of the operation mode of the antenna and information on how to prevent radiation exposure, including disabling the communications system. When maintenance of the antenna is required and the radome is removed, the trained technicians will turn off the transmit power before performing work in these areas. In addition, the antenna will be installed at an elevation that is not accessible by the general population on the vessels, and any areas where the limits for uncontrolled environments could be exceeded will be restricted to trained personnel. Therefore, the general population will be protected. In conclusion, the results show that the Intellian GX60 antenna, in a controlled environment, and under the proper mitigation procedures, meets the guidelines specified in § 1.1310 of the Regulations.

Moreover, the applicant agrees to take all necessary measures to ensure that the antenna does not create potential exposure of humans to radiofrequency radiation in excess of the FCC exposure limits. 2. Radiation Hazard Analysis for the antenna manufactured by Intellian, model: GX100 This section analyzes the non-ionizing radiation levels for the Intellian GX100 earth station included in this application. The analysis and calculations performed in this Exhibit comply with the methods described in the FCC Office of Engineering and Technology Bulletin, No. 65 first published in 1985 and revised in 1997 in Edition 97-01. Bulletin No. 65 and the FCC R&O 96-326 specifies two Maximum Permissible Exposure (MPE) limits that are dependent on the situation in which the exposure takes place and/or the status of the individuals who are subject to the exposure. These are described below: • General Population/Uncontrolled environment MPE limit is 1 mW/cm2. The General Population / Uncontrolled MPE is a function of transmit frequency and is for an exposure period of thirty minutes or less. • Occupational/Controlled environment MPE limit is 5 mW/cm2. The Occupational MPE is a function of transmit frequency and is for an exposure period of six minutes or less. The analysis provided in this report determined the power flux density levels of the earth station in the 1) far-field, 2) near-field, 3) transition region, 4) region between the feed and main reflector surface, 5) at the main reflector surface, and 6) between the antenna edge and the ground. Section 2.1 – Detailed calculations Input Parameter Value Units Symbol Antenna Diameter 1.03 m D Antenna Transmit Gain 47.6 dBi G Transmit Frequency 30000 MHz F Antenna Feed Flange Diameter 5.8 Cm d Power Input to the Antenna 5 Watts P Calculated Parameter Value Units Symbol Formula Antenna Surface Area 0.8332 m² A πD²/4 Area of Antenna Flange 26.420 cm² a πd²/4 Antenna Efficiency 0.5496 Real η gλ²/(π²D²) Gain Factor 57543.9937 Real g 10^(G/10) Wavelength 0.0100 m λ 300/f Antenna Field Distances Calculated Parameter Value Units Symbol Formula Near-Field Distance 26.5225 m Rnf D²/(4λ)

Distance to Far-Field 63.654 m Rff 0.6D²/λ Distance of Transition Range 26.5225 m Rt Rt=Rnf Power Density Calculated Parameter Value Units Symbol Formula Power Density in the Near Field 1.3193 mW/cm² Snf 16ηP/(πD²) Power Density in the Far Field 0.5651 mW/cm² Sff gP/(4πRff²) Power Density in the Transition Region 1.3193 mW/cm² St Snf*Rnf/Rt Power Density at the Feed Flange 757.0018 mW/cm² Sfa 4P/a Power Density at Main Reflector 2.4004 mW/cm² Ssurface 4P/A Power Density between Reflector and Ground 0.6001 mW/cm² Sg P/A Section 2.2 – Summary of Results Region Calculated Limit Controlled Limit Uncontrolled Power Environment Environment Density ≤ 5 mW/cm2 ≤ 1 mW/cm2 (mW/cm2) Near Field 1.3193 meets limit exceeds limit Far Field 0.5651 meets limit meets limit Transition Region 1.3193 meets limit exceeds limit Feed Flange 757.0018 exceeds limit exceeds limit Main Reflector 2.4004 meets limit exceeds limit Between Reflector and Ground 0.6001 meets limit meets limit As summarized in the above table, the Intellian GX100 antenna meets the FCC’s MPE levels for controlled environments except for at the feed flange for the antenna. Since the antenna will be enclosed within a radome, the feed flange area will not be accessible while the antenna is in operation. Training of personnel with access to the antenna would include consideration of the operation mode of the antenna and information on how to prevent radiation exposure, including disabling the communications system. When maintenance of the antenna is required and the radome is removed, the trained technicians will turn off the transmit power before performing work in these areas. In addition, the antenna will be installed at an elevation that is not accessible by the general population on the vessels, and any areas where the limits for uncontrolled environments could be exceeded will be restricted to trained personnel. Therefore, the general population will be protected.

In conclusion, the results show that the Intellian GX100 antenna, in a controlled environment, and under the proper mitigation procedures, meets the guidelines specified in § 1.1310 of the Regulations. Moreover, the applicant agrees to take all necessary measures to ensure that the antenna does not create potential exposure of humans to radiofrequency radiation in excess of the FCC exposure limits.


Document Created: 2015-02-05 13:43:46
Document Modified: 2015-02-05 13:43:46
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