Attachment Exhibit C

This document pretains to SES-MFS-20170221-00188 for Modification w/ Foreign Satellite (earth station) on a Satellite Earth Station filing.

IBFS_SESMFS2017022100188_1189018

Document No.: ERROR! UNKNOWN Exhibit C Rev.: Error! Unknown Page: 1/8 Date: 12/21/2016 Radiation Hazard Analysis This exhibit constitutes the radiation hazard analysis for Row 44 ’s transmitter using the FCC procedure outlined in FCC Bulletin #65. The limit for exposure to RF energy, for frequencies greater than 1.5 GHz, is 5 mW/cm2 for up to a six minute duration (occupational/controlled exposure) and a 1 mW/cm2 for up to 30 minute duration (categorized as general population/ uncontrolled exposure).1 Analysis for exposure to radiation is presented for the near field, far field, and the transition region. Appropriate separation-distances are provided for the controlled and uncontrolled exposure scenarios considering individuals located in the direction of either the antenna’s main beam or its side lobes. Analysis The extent of the near field region for the main beam is defined in terms of the radius Rnf according to the relation Equation 1: Near Field Region Radius where D is the maximum dimension of the antenna panel, and λ is the transmit signal’s wavelength. The near field maximum power density, Snf, is determined from Equation 2: Near Field Maximum Power Density where PPA is the transmit power (after cable losses are accounted for) and A is the surface area of the antenna aperture, and is the efficiency of the antenna aperture. The far field region for the main beam is defined as beginning and continuing out-from a radius Rff, given by Equation 3: Far Field Region Radius The far field power density Sff at the minimum far field radius and farther is given in terms of the EIRP denoted by PEIRP according to 1 “Questions and Answers about Biological Effects and Potential Hazards of Radiofrequency Electromagnetic Fields,” Federal Communications Commission, Office of Engineering and Technology, Bulletin 65, Fourth Edition, August, 1999, p. 15 http://www.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet56/oet56e4.pdf

Document No.: ERROR! UNKNOWN Exhibit C Rev.: Error! Unknown Page: 2/8 Date: 12/21/2016 Equation 4: Far Field Power Density (The value of PEIRP should already consider coax losses and aperture efficiency.) Note that when the radius is expressed in meters, the Power Density is in units of W/m2. The results are converted to units consistent with the FCC limits (mW/ cm2) by multiplying values in W/m2 by 0.1. Near Field Exposure from Main Antenna Beam The GSAA antenna has the “quasi-oval” dimensions of D=0.627 m (24.7 inches) and h=0.198 m (7.8 inches). However, all considered, the adjusted surface area “A” equals 0.1019 m2. At the highest frequency of 14.5 GHz, the wavelength is 0.0207 m. The near field radius is then Rnf = 4.75 m The antenna aperture efficiency factor, η, is 0.77 and losses attributable to various hardware is 4.21 dB. Based on the wavelength and the panel-width given farther above, the Far Field radius is then Rff = 11.41 m In the operation of GEE’s system, the antenna may be fed with ten different signal levels, as provided in Table 1 and Table 2. The associated Near Field radius Power Density Values are: Table 1: HPA Transmit Power, EIRP, and Near Field Power Density as a Distance Rnf HPA Transmit HPA Transmit Transmit Power Snf (mW/cm2)* Power (Watts) Power (dBm) (dBm)* 25.00 43.98 39.77 7.17 22.28 43.48 39.27 6.39 19.86 42.98 38.77 5.69 17.70 42.48 38.27 5.07 15.77 41.98 37.77 4.52 14.06 41.48 37.27 4.03 12.53 40.98 36.77 3.59 11.17 40.48 36.27 3.20 9.95 39.98 35.77 2.85 8.87 39.48 35.27 2.54 7.91 38.98 34.77 2.27 7.05 38.48 34.27 2.02 6.28 37.98 33.77 1.80 5.60 37.48 33.27 1.60 4.99 36.98 32.77 1.43 4.45 36.48 32.27 1.27 3.96 35.98 31.77 1.14 3.53 35.48 31.27 1.01 3.15 34.98 30.77 0.902 2.81 34.48 30.27 0.804

Document No.: ERROR! UNKNOWN Exhibit C Rev.: Error! Unknown Page: 3/8 Date: 12/21/2016 HPA Transmit HPA Transmit Transmit Power Snf (mW/cm2)* Power (Watts) Power (dBm) (dBm)* 2.50 33.98 29.77 0.717 *Incorporates hardware losses Note that the equation for the maximum Power Density in the Near Field considers a given radiated signal/power confined-to and passing-through a physical area corresponding to that of the antenna aperture. Along these lines, the Snf values cannot be assumed to vary with distance from the antenna, for locations within the Near Field. The associated Far Field radius Power density values are as well: Table 2: HPA Transmit Power, EIRP, and Far Field Power Density at Distance Rff HPA Transmit HPA Transmit EIRP (dBm)* Sff Power (Watts) Power (dBm) (mW/cm2)* 25.00 43.98 73.37 1.33 22.28 43.48 72.87 1.19 19.86 42.98 72.37 1.06 17.70 42.48 71.87 0.942 15.77 41.98 71.37 0.839 14.06 41.48 70.87 0.748 12.53 40.98 70.37 0.667 11.17 40.48 69.87 0.594 9.95 39.98 69.37 0.530 8.87 39.48 68.87 0.472 7.91 38.98 68.37 0.421 7.05 38.48 67.87 0.375 6.28 37.98 67.37 0.334 5.60 37.48 66.87 0.298 4.99 36.98 66.37 0.265 4.45 36.48 65.87 0.237 3.96 35.98 65.37 0.211 3.53 35.48 64.87 0.188 3.15 34.98 64.37 0.167 2.81 34.48 63.87 0.149 2.50 33.98 63.37 0.133 * Incorporates hardware losses Row 44 is considering exposure to two values of Power Density: 5 mW/cm2 and 1 mW/cm2. 5 mW/cm2 Analysis Some of the Snf values in Table 1 are greater than 5 mW/cm2, and some are less than 5 mW/cm2. As the Near Field analysis assumes that the Power Density in the Near Field does not vary with distance, for cases where Snf values are less than 5 mW/cm2, there is no location in the Near Field where the Power Density is higher. No individual located in the Near Field anywhere whatsoever will be subjected to a 5 mW/cm2 exposure level.

Document No.: ERROR! UNKNOWN Exhibit C Rev.: Error! Unknown Page: 4/8 Date: 12/21/2016 For the Snf values in Table 1 which are greater than 5 mW/cm2, we’ll assume that the Power Density decreases linearly between the Near Field radius and the Far Field radius. Interpolating the respective Power Density values, Table 3 lists the distances where the Power Density will equal 5 mW/cm2 (for the selected TX powers). Table 3: Separation for Controlled Exposure Limit (Main Beam) HPA Transmit Separation for Controlled Limit (5 mW/cm2) Power (dBm) Meters Feet 43.98 7.22 23.7 43.48 6.52 21.4 42.98 5.74 18.8 42.48 4.87 16.0 As mentioned previously, if for Snf values less than 5 mW/cm2, in attempting to determine the location at which the Power Density may equal 5 mW/cm2, we cannot project a location closer than Rnf. For such cases, and for these power levels, a conservative approach will be adopted. Table 4 therefore designates the Near Field radius of 4.75 meters (15.6 feet) as the minimum physical separation guaranteeing an exposure no greater than 5 mW/cm2. Table 4: Separation for Controlled Exposure Limit (Main Beam) HPA Transmit Separation for Controlled Limit (5 mW/cm2) Power (dBm) Meters Feet 41.98 4.75 15.6 41.48 4.75 15.6 40.98 4.75 15.6 40.48 4.75 15.6 39.98 4.75 15.6 39.48 4.75 15.6 38.98 4.75 15.6 38.48 4.75 15.6 37.98 4.75 15.6 37.48 4.75 15.6 36.98 4.75 15.6 36.48 4.75 15.6 35.98 4.75 15.6 35.48 4.75 15.6 34.98 4.75 15.6 34.48 4.75 15.6 33.98 4.75 15.6 1 mW/cm2 Analysis For the cases in Table 2 where the Sff values are greater than 1 mW/cm2, the distance of separation will be calculated by inverse-squared analysis. For the cases in Table 2 where the Sff values are less than 1 mW/cm2, linear interpolation will be used to identify the location between

Document No.: ERROR! UNKNOWN Exhibit C Rev.: Error! Unknown Page: 5/8 Date: 12/21/2016 Rnf and Rff where the 1 mW/cm2 value will be encountered. For the cases in Table 1 where the Snf values are less than 1 mW/cm2, a distance of Rnf will apply. For the TX levels where Sff values exceed 1 mW/cm2, standard inverse-squared analysis has been used to identify the necessary separations listed in Table 5.

Document No.: ERROR! UNKNOWN Exhibit C Rev.: Error! Unknown Page: 6/8 Date: 12/21/2016 Table 5: Separation for Uncontrolled Exposure Limit (Main Beam) HPA Transmit Separation for Uncontrolled Power (dBm) Limit (1 mW/cm2) Meters Feet 43.98 13.1 43.1 43.48 12.4 40.7 42.98 11.7 38.4 For the TX levels where Sff values are less than 1 mW/cm2, linear interpolation will be employed (considering the Power Density values at Rnf and Rff) in order to project the location at which a 1 mW/cm2 exposure exists. Assuming that the Power Density decreases linearly between the Near Field radius and the Far Field radius, the distances at which the Power Density equals 1 mW/cm2 are listed in Table 6. Table 6: Separation for Uncontrolled Exposure Limit (Main Beam) HPA Transmit Separation for Uncontrolled Power (dBm) Limit (1 mW/cm2) Meters Feet 42.48 11.3 37.1 41.98 11.1 36.5 41.48 10.9 35.7 40.98 10.6 34.9 40.48 10.4 34.0 39.98 10.1 33.0 39.48 9.71 31.8 38.98 9.31 30.6 38.48 8.87 29.1 37.98 8.38 27.5 37.48 7.83 25.7 36.98 7.21 23.6 36.48 6.51 21.4 35.98 5.73 18.8 35.48 4.85 15.9 For TX levels where Snf values are less than 1 mW/cm2, a conservative approach will be adopted. Table 7 therefore references the Near Field radius of 4.75 meters (15.6 feet) as the minimum physical separation to facilitate an exposure no greater than 1 mW/cm2 for the respective power levels. Table 7: Separation for Uncontrolled Exposure Limit (Main Beam) HPA Transmit Separation for Uncontrolled Power (dBm) Limit (1 mW/cm2) Meters Feet 34.98 4.75 15.6 34.48 4.75 15.6

Document No.: ERROR! UNKNOWN Exhibit C Rev.: Error! Unknown Page: 7/8 Date: 12/21/2016 HPA Transmit Separation for Uncontrolled Power (dBm) Limit (1 mW/cm2) Meters Feet 33.98 4.75 15.6 Exposure from Antenna Beam Side-Lobes The previous calculations assumed the individual was located in the sight of the main antenna beam (The main antenna beam is less than 10 degrees beam-width in azimuth). The following analysis provides insight into the exposure when an individual is located to the side of or behind the antenna. Table 8 provides Power Density values at distances Rnf and Rff when an individual is located in the direction of the highest antenna side-lobe (which corresponds to a 17 dB gain reduction from the main beam). Table 8: Transmit Power, EIRP, and Far Field Power Density at Distance Rff HPA Sidelobe Sidelobe Sidelobe Snf Sff Transmit (dB) Transmit EIRP (mW/cm2) (mW/cm2) Power (dBm) Power (dBm)* (dBm)* 43.98 -17 22.77 52.16 0.0542 0.0265 43.48 -17 22.27 51.66 0.0483 0.0237 42.98 -17 21.77 51.16 0.0431 0.0211 42.48 -17 21.27 50.66 0.0384 0.0188 41.98 -17 20.77 50.16 0.0342 0.0167 41.48 -17 20.27 49.66 0.0305 0.0149 40.98 -17 19.77 49.16 0.0272 0.0133 40.48 -17 19.27 48.66 0.0242 0.0119 39.98 -17 18.77 48.16 0.0216 0.0106 39.48 -17 18.27 47.66 0.0192 0.00942 38.98 -17 17.77 47.16 0.0171 0.00839 38.48 -17 17.27 46.66 0.0152 0.00748 37.98 -17 16.77 46.16 0.0136 0.00667 37.48 -17 16.27 45.66 0.0121 0.00594 36.98 -17 15.77 45.16 0.0108 0.00530 36.48 -17 15.27 44.66 0.00965 0.00472 35.98 -17 14.77 44.16 0.00860 0.00421 35.48 -17 14.27 43.66 0.00766 0.00375 34.98 -17 13.77 43.16 0.00683 0.00334 34.48 -17 13.27 42.66 0.00609 0.00298 33.98 -17 12.77 42.16 0.00542 0.00265 *Incorporates Coax Feeder Loss As is obvious, neither the Snf or Sff values (at distances Rnf or Rff) exceed even the uncontrolled limit of 1 mW/cm2. Therefore, no minimum distance criteria of separation will apply for individuals located in directions outside the antenna’s main beam.

Document No.: ERROR! UNKNOWN Exhibit C Rev.: Error! Unknown Page: 8/8 Date: 12/21/2016 Summary This exhibit presents the radiation hazard analysis for Row 44 ’s GSAA transmitter transmitting at HPT output/transmit power levels of 33.98 to 43.98 dBW in increments of 0.5 dB. Considering the worst-cases, individuals positioned in the direction of the main beam of the antenna, and in the controlled exposure environment should be at least 7.22 meters (23.7 feet) away from the antenna aperture (for a six minute duration). Under the same circumstance, individuals in an uncontrolled exposure environment should be at least 13.1 meters (43.1 feet) away from the antenna aperture (for a 30 minute duration). For individuals located in directions which are outside the antenna’s main beam, no minimum distance of separation is applicable.


Document Created: 2017-01-26 13:30:56
Document Modified: 2017-01-26 13:30:56
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