Attachment Technical Appendix

This document pretains to SES-LIC-20140922-00748 for License on a Satellite Earth Station filing.

IBFS_SESLIC2014092200748_1061901

THE BOEING COMPANY Application of The Boeing Company for Authority to Operate Up to 100 Earth Stations Aboard Aircraft (“ESAA”) Technical Appendix September 22, 2014

Table of Contents 1 Boeing Phased Array Antenna ...................................................................................................1 1.1 Antenna Control and Pointing .............................................................................2 1.2 Transmit Antenna Patterns ..................................................................................2 2 MELCO Reflector Terminal ......................................................................................................5 2.1 Antenna Control and Pointing .............................................................................6 2.2 Antenna Gain Patterns .........................................................................................6 3 TECOM KuStream 1500 ...........................................................................................................8 3.1 Antenna Control and Pointing .............................................................................9 3.2 Antenna Gain Patterns .........................................................................................9 i

1 Boeing Phased Array Antenna The Boeing Phased Array Antenna (“PAA”) sub system contains a separate receive and transmit antenna. Both the receive and transmit antenna are fixed to the top of the aircraft fuselage and use electronic beam steering to track the desired satellite through aircraft flight maneuvers and over a large geographic range. The receive antenna employs a closed loop pointing algorithm to track the desired satellite with the transmit antennas pointing being continuously slaved to the resulting pointing vector. Figure 1 shows a representative installation of the PAA antennae. Table 1 summarizes important receive and transmit antennae characteristics. Figure 1. Representative PAA Receive and Transmit Antennae Specification Antenna Data Aperture Dimensions Receive 17”x24” (uniform illumination) Transmit 15” circular (uniform illumination) Transmit Band 14.0-14.5 GHz Receive Band 11.45-12.75 GHz Frequency Tolerance +/-10 kHz EIRP 51.2 dBW @ 0o Scan G/T 12.5 dB/K @ 0o Scan Transmit Gain 34.9 dBi at 14.2 GHz Receive Gain 36.7 dBi at 12.0 GHz Polarization Linear Table 1. Antenna Characteristics Summary One attribute of a phased array antenna is its level of scan loss. Scan loss refers to the decrease in gain that occurs as a phased array antenna operates at an increased scan angle, and the increase in beam width that results as the beam is scanned from zenith. The antenna gain falls off nearly as the cosine of the scan angle. The design specifications for the Boeing system allow for scan angles of up to 75 degrees. As a minimum, the antennae can acquire and maintain track within a cone extending to a 75 degree scan from vertical over a full 360 degrees of azimuth. 1

There are no ‘keyholes’ or areas of blockage within this cone. The antennae have been operational for airborne mobile operations without incident for more than 10 years. 1.1 Antenna Control and Pointing Accurate pointing of the receive and transmit antennas is achieved by closed loop pointing of the receive antenna towards a desired satellite and slaving of the transmit beam to the receive beam calculated direction. Initial acquisition of the satellite is accomplished through the use of the aircraft navigation data and is performed by the receive antenna only with the transmit antenna muted. The receive antenna performs a conical scan pointing algorithm sequential lobing at four points about the pointing vector between the aircraft and the satellite and, using the measured receive signal strengths for each of these four lobing points, updates the pointing vector. The receive antenna performs this operation about 50 times per second and can accurately point to the satellite during extreme aircraft movements. The transmit antenna pointing vector is updated at a rate of about 50 times per second based on the pointing vector calculated by the receive antenna. Since both the receive and transmit antennas are electronically steered, the antennas are able to change their pointing vectors to any visible location in the sky at each update cycle (50 times a second). Using this algorithm, the only tracking error that the PAA transmit antenna will exhibit is the one inherent in the 20 ms update rate. At every pointing update the antenna will be pointing at the satellite location. The PAA pointing error will be less than 0.1 degrees. Receive antenna polarization tracking is performed using the receive signal strengths similar to the closed loop pointing algorithm, but the cycle rate is reduced to about 25 times per second to avoid coupling with the pointing algorithm. For subsequent passes through the algorithm, the polarization is dithered in opposite directions and the differences in the signal strength measurements are used to calculate best polarization angle. The transmit antenna polarization is set by an open loop using both the airplane location information as well as the antenna transmit vector information and is updated at the same rate as the spatial pointing vector. 1.2 Transmit Antenna Patterns Pursuant to Section 25.132(b)(1-2), Boeing provides the following antenna gain patterns for the Boeing PAA. Both azimuth (Az) and elevation (El) patterns are provided for vertical (V) and horizontal (H) polarization at 14.2 GHz. 2

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2 MELCO Reflector Terminal The second of the terminals used with the BBSN is the MELCO Reflector Terminal developed by Mitsubishi Electronics Company (“MELCO”) for Boeing. The reflector terminal transmits and receives using a single elliptical Cassegrain reflector that is mechanically steered to acquire and track the desired satellite through aircraft flight maneuvers and over a large geographic range. The polarization angle is electronically rotated to match the polarization of the satellite. The reflector antenna is mounted on the top of the aircraft body and enclosed in a radome. Associated support electronics will be installed in the aircraft fuselage. Table 2 below provides the specifications for the reflector terminal, and Figure 2 provides a picture of the antenna. Specification Antenna Data Aperture Dimensions 65.0 x 19.6 cm elliptical Transmit Band 14.0-14.5 GHz Receive Band 11.2-12.75 GHz Frequency Tolerance +/-10 kHz EIRP 46.7 dBW G/T 10.5 dB/K Transmit Gain 33.1 dBi at 14.2 GHz Receive Gain 31.6 dBi at 12.0 GHz Polarization Linear Table 2. Reflector Terminal Specifications Figure 2. Reflector Terminal 5

2.1 Antenna Control and Pointing Pointing for the MELCO Reflector Terminal is accomplished via mechanical steering of the antenna and uses the aircraft attitude data (i.e. yaw, roll, pitch, yaw rate, roll rate, pitch rate, and heading vector), together with location of the terminal (latitude, longitude, and altitude) to calculate the command vectors. This data, available from the ARINC 429 bus, is used in conjunction with the satellite coordinates to yield continuously updated steering commands for the antenna elevation, azimuth, and polarization. A local inertial sensor package placed on the antenna base plate itself provides high rate antenna attitude sensing, which compensates for possible aircraft inertial navigation system (“INS”) errors caused by airframe deformation and data latency. The MELCO Reflector Terminal is capable of reliably maintaining a 0.2 degrees pointing accuracy through all anticipated flight maneuvers. Pointing error will be monitored and emissions will be inhibited if the pointing error ever exceeds 0.5 degrees. 2.2 Antenna Gain Patterns Pursuant to §25.132(b)(1-2), Boeing provides the following antenna gain patterns for the MELCO Reflector Terminal, which is labeled below by Mitsubishi as model BBM3b. Both azimuth (Az) and elevation (El) patterns are provided for vertical (V) and horizontal (H) polarization at 14.2 GHz. 6

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3 TECOM KuStream 1500 The KuStream 1500 terminal (“KuStream 1500”), manufactured by TECOM, is an increased EIRP version of the KuStream terminal that has been previously authorized by the Commission for both experimental and commercial operations. For example, the TECOM terminal was authorized for aeronautical experimental operations by Row 44, Inc. in 2009 (File No. 0236-EX-PL-2009, Call Sign WF2XBY), and for commercial operations in 2010 (File No. SES-MOD-20091021-01342, Call Sign E080100). The KuStream 1500 terminal transmits and receives using a single horn array aperture that is mechanically steered to acquire and track the desired satellite through aircraft flight maneuvers and over a large geographic range. The polarization angle is electronically rotated to match the polarization of the satellite. The horn array aperture is mounted on the top of the aircraft body and enclosed in a radome. Associated support electronics will be installed in the aircraft fuselage. Table 3 below provides the specifications for the KuStream 1500 terminal, and Figure 3 provides a picture of the antenna Specification Antenna Data Aperture Dimensions 65.0 x 17.5 cm rectangular Transmit Band 14.0-14.5 GHz Receive Band 11.45-12.75 GHz Frequency Tolerance +/-10 kHz G/T 11.9 dB/K Transmit Gain 32.5 dBi 8

Receive Gain 31.5 dBi EIRP 44.8 dBW Pointing Error < 0.2 degrees Table 3. KuStream 1500 Specifications Figure 3. TECOM KuStream 1500 3.1 Antenna Control and Pointing The KuStream 1500 antenna employs mechanical steering of the aperture and uses the aircraft attitude data (i.e. yaw, roll, pitch, yaw rate, roll rate, pitch rate, and heading vector), together with location of the terminal (latitude, longitude, and altitude) to calculate the command vectors. The attitude and position data is provided to the antenna by a dedicated inertial reference unit (IRU) and is used in conjunction with the satellite coordinates to yield continuously updated steering commands for the antenna elevation, azimuth, and polarization. Using the dedicated low latency IRU that is located in close proximity to the antenna allows for a high rate position and attitude sensing and eliminates errors caused by airframe deformation and data latency. The KuStream 1500 is capable of reliably maintaining 0.2 degree pointing accuracy through all anticipated flight maneuvers. In the event that pointing offset exceeds 0.5 degree, the terminal will automatically mute transmissions within 100 milliseconds and delay resumption of transmissions until pointing accuracy is within 0.2 degrees. 3.2 Antenna Gain Patterns Pursuant to §25.132(b)(1-2), Boeing provides the following antenna gain patterns for the KuStream 1500 antenna. Both azimuth (Az) and elevation (El) patterns are provided for vertical (V) and horizontal (H) polarization at 14.2 GHz. 9

KuStream 1500 Measured Azimuth Patterns, 14.2GHz —Az—V —Az—H ~10 Relative Gain (dB) —20 ~30 —40 A & |1 I\ —50 —75 50 25 0 25 0 5o 75 Angle From Bore Sight (Theta in degrees) KuStream 1500 Measured Azimuth Patterns, 14.2GHz | | —Az—V —Az—H ~10 Relative Gain (dB) —20 ~30 —40 —7 —3 —2 41 0 1 2 3 4 5 6 Angle From Bore Sight (Theta in degrees)

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ATTACHMENT 1 Radiation Hazard Studies

The Boeing Company P.O. Box 3707 9/22/2014 Seattle, WA 98124 2207 Page 1 This report presents an analysis of the non-ionizing radiation levels for a Boeing Phased Array antenna system. The calculations used in this analysis were derived from and comply with the procedures outlined in the Federal Communications Commission, Office of Engineering and Technology, Bulletin Number 65, which establishes guidelines for human exposure to Radio Frequency Electromagnetic Fields. Bulletin 65 defines exposure levels in two separate categories, the General Population/Uncontrolled Areas limits, and the Occupational/Controlled Area limits. The Maximum Permissible Exposure (MPE) limit of the General Population/ Uncontrolled Area is defined in Table (1), and represents a maximum exposure limit averaged over a 30 minute period. The MPE limit of the Occupational/ Controlled Area is defined in Table (2), and represents a maximum exposure limit averaged over a 6 minute period. The purpose of this report is to provide an analysis of the aircraft station power flux densities, and to compare those levels to the specified MPE limits. This report provides predicted density levels in the near field, far field, transition region, and main reflector surface area. MPE Limits for General Population/Uncontrolled Area Frequency Range (MHz) Power Density (mW/cm2) 1500 – 100,000 1.0 Table 1 MPE Limits for Occupational/Controlled Area Frequency Range (MHz) Power Density (mW/cm2) 1500 – 100,000 5.0 Table 2

The Boeing Company P.O. Box 3707 9/22/2014 Seattle, WA 98124 2207 Page 2 Table 3 contains formulas, equations and parameters that were used in determining the Power Flux Density levels for the Boeing Phased Array: Data Type Data Data Formula Data Value Unit of Symbol Measure Power Input P Input 42.7 W Antenna Size D Input 0.381 m Antenna Area A πD 2 0.1140 m2 A= 4 Subreflector Size Sub Input N/A cm Subreflector Area Asub 2 N/A cm2 Asub = πDSub 4 Gain dBi Gdbi Input 34.9 dBi Gain Factor G G = 10GdBi/10 3090.3 Gain Factor Frequency f Input 14250 MHz Wavelength λ 299.79 / f 0.021038 m Aperture Efficiency η Gλ2 .95 n/a η= 4πA Pi π Input 3.14159 Numeric Speed of Light C Input 299,792,458 m/sec Conversion W to mW mW mW = W × 1000 n/a n/a Conversion M to cm cm cm = m × 100 n/a n/a Conversion M2 to cm2 cm2 cm2 = m 2 × 10000 n/a n/a Conversion W/M2 to mW/cm2 W n/a n/a mW/cm2 = mW/cm2 10m 2 Table 3 1. Far Field Analysis The distance to the far field can be calculated using the following formula: 0.6 D 2 R ff = = 4.14 Meters λ The power density in the far field can be calculated using the following formula. Note: this formula requires the use of power in milliwatts and far field distance in centimeters, or requires a post calculation conversion from W/M2: For the purposes of this report we calculated the range where the occupational

The Boeing Company P.O. Box 3707 9/22/2014 Seattle, WA 98124 2207 Page 3 hazard limit of 5mW/cm2 would be reached, thus establishing a keep out range for occupational workers. PG S ff = 2 = 61.267 mW/cm2 or at 5mW/cm2 R = 14.5 m 4πR ff 2. Near Field Analysis The extent of the Near Field region can be calculated using the following formula: D2 Rnf = = 1.72 m 4λ The power density of the near field can be calculated using the following formula. Note: this formula requires the use of power in milliwatts and diameter in centimeters, or requires a post calculation conversion from W/M2: 16ηP S nf = = 143.024 mW/cm2 πD 2 3. Transition Region Analysis The transition region extends from the end of the near field out to the beginning of the far field. The power density in the transition region decreases inversely with distance from the antenna, while power density in the far-field decreases inversely with the square of the distance. However the power density in the transition region will not exceed the density in the near field, and can be calculated for any point in the transition region (R), using the following formula. S nf Rnf St = R 4. Main Reflector Surface Area Analysis The maximum power density at the antenna surface area can be calculated using the following formula. Note: this formula requires the use of Power in milliwatts and Area in centimeters squared, or requires a post calculation conversion from W/M2. 4P S surface = = 149.812 mW/cm2 A

The Boeing Company P.O. Box 3707 9/22/2014 Seattle, WA 98124 2207 Page 4 Tables 4 and 5 present a summary of the radiation hazard findings on the Boeing Phased Array terminal for both the General Population/Uncontrolled Area, as well as the Occupational/Controlled area environments. MPE Limits for General Population/Uncontrolled Area Area Range Power Density Finding Meters (mW/cm2) Far Field 4.14 61.267 mW/cm2 Potential Hazard Near Field 1.72 143.024 mW/cm2 Potential Hazard Transition Region 1.72 – 4.14 143.024 mW/cm2 Potential Hazard Main Reflector Surface N/A 149.812 mW/cm2 Potential Hazard Table 4 MPE Limits for Occupational/Controlled Area Area Range Power Density Finding Meters (mW/cm2) Far Field 4.14 61.267 mW/cm2 Potential Hazard Near Field 1.72 143.024 mW/cm2 Potential Hazard Transition Region 5.02 – 12.05 143.024 mW/cm2 Potential Hazard Main Reflector Surface N/A 149.812 mW/cm2 Potential Hazard Table 5 5. Summary This document presents the radiation hazard for the Boeing Broadband System Network incorporating the Boeing Phased Array antenna and the maximum EIRP of 51.2 dBW. The radiation hazard is divided into two cases; General Public and Occupational. The General Public risk is mitigated by the placement of the antenna on the top of the aircraft, which is not accessible to the general public. The Occupational risk will be controlled by turning the system off prior to performing any antenna maintenance, accessing the top of the aircraft near the antenna, or operating personnel lifts or other similar equipment in the vicinity of the antenna hazard zone defined in this report.

The Boeing Company P.O. Box 3707 9/22/2014 Seattle, WA 98124 2207 Page 1 This report presents an analysis of the non-ionizing radiation levels for a MELCO antenna system. The calculations used in this analysis were derived from and comply with the procedures outlined in the Federal Communications Commission, Office of Engineering and Technology, Bulletin Number 65, which establishes guidelines for human exposure to Radio Frequency Electromagnetic Fields. Bulletin 65 defines exposure levels in two separate categories, the General Population/Uncontrolled Areas limits, and the Occupational/Controlled Area limits. The Maximum Permissible Exposure (MPE) limit of the General Population/ Uncontrolled Area is defined in Table (1), and represents a maximum exposure limit averaged over a 30 minute period. The MPE limit of the Occupational/ Controlled Area is defined in Table (2), and represents a maximum exposure limit averaged over a 6 minute period. The purpose of this report is to provide an analysis of the aircraft station power flux densities, and to compare those levels to the specified MPE limits. This report provides predicted density levels in the near field, far field, transition region, and main reflector surface area. MPE Limits for General Population/Uncontrolled Area Frequency Range (MHz) Power Density (mW/cm2) 1500 – 100,000 1.0 Table 1 MPE Limits for Occupational/Controlled Area Frequency Range (MHz) Power Density (mW/cm2) 1500 – 100,000 5.0 Table 2

The Boeing Company P.O. Box 3707 9/22/2014 Seattle, WA 98124 2207 Page 2 Table 3 contains formulas, equations and parameters that were used in determining the Power Flux Density levels for the MELCO: Data Type Data Data Formula Data Value Unit of Symbol Measure Power Input P Input 23 W Antenna Size D Input 0.65 m Antenna Area A πD 2 0.1274 m2 A= 4 Subreflector Size Sub Input N/A cm Subreflector Area Asub 2 N/A cm2 Asub = πDSub 4 Gain dBi Gdbi Input 33.1 dBi Gain Factor G G = 10GdBi/10 2041.74 Gain Factor Frequency f Input 14250 MHz Wavelength λ 299.79 / f 0.021038 m Aperture Efficiency η Gλ2 .56 n/a η= 4πA Pi π Input 3.14159 Numeric Speed of Light C Input 299,792,458 m/sec Conversion W to mW mW mW = W × 1000 n/a n/a Conversion M to cm cm cm = m × 100 n/a n/a Conversion M2 to cm2 cm2 cm2 = m 2 × 10000 n/a n/a Conversion W/M2 to mW/cm2 W n/a n/a mW/cm2 = mW/cm2 10m 2 Table 3 1. Far Field Analysis The distance to the far field can be calculated using the following formula: 0.6 D 2 R ff = = 12.05 Meters λ The power density in the far field can be calculated using the following formula. Note: this formula requires the use of power in milliwatts and far field distance in centimeters, or requires a post calculation conversion from W/M2:

The Boeing Company P.O. Box 3707 9/22/2014 Seattle, WA 98124 2207 Page 3 PG S ff = 2 = 2.574 mW/cm2 4πR ff 2. Near Field Analysis The extent of the Near Field region can be calculated using the following formula: D2 Rnf = = 5.02 Meters 4λ The power density of the near field can be calculated using the following formula. Note: this formula requires the use of power in milliwatts and diameter in centimeters, or requires a post calculation conversion from W/M2: 16ηP S nf = = 15.650 mW/cm2 πD 2 3. Transition Region Analysis The transition region extends from the end of the near field out to the beginning of the far field. The power density in the transition region decreases inversely with distance from the antenna, while power density in the far-field decreases inversely with the square of the distance. However the power density in the transition region will not exceed the density in the near field, and can be calculated for any point in the transition region (R), using the following formula. For the purposes of this analysis we calculated the transition region range where the occupational hazard limit of 5 mW/cm2 would be reached, thus establishing a keep out range for occupational workers. S nf Rnf St = = 5 mW/cm2 = 10.75 Meters R 4. Main Reflector Surface Area Analysis The maximum power density at the antenna surface area can be calculated using the following formula. Note: this formula requires the use of Power in milliwatts and Area in centimeters squared, or requires a post calculation conversion from W/M2. 4P S surface = = 72.214 mW/cm2 A

The Boeing Company P.O. Box 3707 9/22/2014 Seattle, WA 98124 2207 Page 4 Tables 4 and 5 present a summary of the radiation hazard findings on the MELCO terminal for both the General Population/Uncontrolled Area, as well as the Occupational/Controlled area environments. MPE Limits for General Population/Uncontrolled Area Area Range Power Density Finding Meters (mW/cm2) Far Field 12.05 2.574 mW/cm2 Potential Hazard Near Field 5.02 15.650 mW/cm2 Potential Hazard Transition Region 5.02 – 12.05 15.650 mW/cm2 Potential Hazard Main Reflector Surface N/A 72.214 mW/cm2 Potential Hazard Table 4 MPE Limits for Occupational/Controlled Area Area Range Power Density Finding Meters (mW/cm2) Far Field 12.05 2.574 mW/cm2 Meets FCC Requirement Near Field 5.02 15.650 mW/cm2 Potential Hazard Transition Region 5.02 – 12.05 15.650 mW/cm2 Potential Hazard Main Reflector Surface N/A 72.214 mW/cm2 Potential Hazard Table 5 5. Summary This document presents the radiation hazard for the Boeing Broadband System Network incorporating the MELCO antenna and the maximum EIRP of 46.7 dBW. The radiation hazard is divided into two cases; General Public and Occupational. The General Public risk is mitigated by the placement of the antenna on the top of the aircraft, which is not accessible to the general public. The Occupational risk will be controlled by turning the system off prior to performing any antenna maintenance, accessing the top of the aircraft near the antenna, or operating personnel lifts or other similar equipment in the vicinity of the antenna hazard zone defined in this report.

The Boeing Company P.O. Box 3707 9/22/2014 Seattle, WA 98124 2207 Page 1 This report presents an analysis of the non-ionizing radiation levels for a TECOM antenna system. The calculations used in this analysis were derived from and comply with the procedures outlined in the Federal Communications Commission, Office of Engineering and Technology, Bulletin Number 65, which establishes guidelines for human exposure to Radio Frequency Electromagnetic Fields. Bulletin 65 defines exposure levels in two separate categories, the General Population/Uncontrolled Areas limits, and the Occupational/Controlled Area limits. The Maximum Permissible Exposure (MPE) limit of the General Population/ Uncontrolled Area is defined in Table (1), and represents a maximum exposure limit averaged over a 30 minute period. The MPE limit of the Occupational/ Controlled Area is defined in Table (2), and represents a maximum exposure limit averaged over a 6 minute period. The purpose of this report is to provide an analysis of the aircraft station power flux densities, and to compare those levels to the specified MPE limits. This report provides predicted density levels in the near field, far field, transition region, and main reflector surface area. MPE Limits for General Population/Uncontrolled Area Frequency Range (MHz) Power Density (mW/cm2) 1500 – 100,000 1.0 Table 1 MPE Limits for Occupational/Controlled Area Frequency Range (MHz) Power Density (mW/cm2) 1500 – 100,000 5.0 Table 2

The Boeing Company P.O. Box 3707 9/22/2014 Seattle, WA 98124 2207 Page 2 Table 3 contains formulas, equations and parameters that were used in determining the Power Flux Density levels for the TECOM: Data Type Data Data Formula Data Value Unit of Symbol Measure Power Input P Input 17 W Antenna Size D Input 0.65 m Antenna Area A Input 0.1137 m2 Subreflector Size Sub Input N/A cm Subreflector Area Asub 2 N/A cm2 Asub = πDSub 4 Gain dBi Gdbi Input 32.5 dBi Gain Factor G G = 10GdBi/10 1778.28 Gain Factor Frequency f Input 14250 MHz Wavelength λ 299.79 / f 0.021038 m Aperture Efficiency η Gλ2 .55 n/a η= 4πA Pi π Input 3.14159 Numeric Speed of Light C Input 299,792,458 m/sec Conversion W to mW mW mW = W × 1000 n/a n/a Conversion M to cm cm cm = m × 100 n/a n/a Conversion M2 to cm2 cm2 cm2 = m 2 × 10000 n/a n/a Conversion W/M2 to mW/cm2 W n/a n/a mW/cm2 = mW/cm2 10m 2 Table 3 1. Far Field Analysis The distance to the far field can be calculated using the following formula: 0.6 D 2 R ff = = 12.05 Meters λ The power density in the far field can be calculated using the following formula. Note: this formula requires the use of power in milliwatts and far field distance in centimeters, or requires a post calculation conversion from W/M2: PG S ff = 2 = 1.657 mW/cm2 4πR ff

The Boeing Company P.O. Box 3707 9/22/2014 Seattle, WA 98124 2207 Page 3 2. Near Field Analysis The extent of the Near Field region can be calculated using the following formula: D2 Rnf = = 5.02 Meters 4λ The power density of the near field can be calculated using the following formula. Note: this formula requires the use of power in milliwatts and diameter in centimeters, or requires a post calculation conversion from W/M2: 16ηP S nf = = 11.288 mW/cm2 πD 2 3. Transition Region Analysis The transition region extends from the end of the near field out to the beginning of the far field. The power density in the transition region decreases inversely with distance from the antenna, while power density in the far-field decreases inversely with the square of the distance. However the power density in the transition region will not exceed the density in the near field, and can be calculated for any point in the transition region (R), using the following formula. For the purposes of this analysis we calculated the transition region range where the occupational hazard limit of 5 mW/cm2 would be reached, thus establishing a keep out range for occupational workers. S nf Rnf St = at 5 mW/cm2 R = 11.34 m R 4. Main Reflector Surface Area Analysis The maximum power density at the antenna surface area can be calculated using the following formula. Note: this formula requires the use of Power in milliwatts and Area in centimeters squared, or requires a post calculation conversion from W/M2. 4P S surface = = 59.807 mW/cm2 A Tables 4 and 5 present a summary of the radiation hazard findings on the TECOM terminal for both the General Population/Uncontrolled Area, as well as the Occupational/Controlled area environments.

The Boeing Company P.O. Box 3707 9/22/2014 Seattle, WA 98124 2207 Page 4 MPE Limits for General Population/Uncontrolled Area Area Range Power Density Finding Meters (mW/cm2) Far Field 12.05 1.657 mW/cm2 Potential Hazard Near Field 5.02 11.288 mW/cm2 Potential Hazard Transition Region 5.02 – 12.05 11.288 mW/cm2 Potential Hazard Main Reflector Surface N/A 59.807 mW/cm2 Potential Hazard Table 4 MPE Limits for Occupational/Controlled Area Area Range Power Density Finding Meters (mW/cm2) Far Field 12.05 1.657 mW/cm2 Meets FCC Requirement Near Field 5.02 11.288 mW/cm2 Potential Hazard Transition Region 5.02 – 12.05 11.288 mW/cm2 Potential Hazard Main Reflector Surface N/A 59.807 mW/cm2 Potential Hazard Table 5 5. Summary This document presents the radiation hazard for the Boeing Broadband System Network incorporating the TECOM antenna and the maximum EIRP of 44.8 dBW. The radiation hazard is divided into two cases; General Public and Occupational. The General Public risk is mitigated by the placement of the antenna on the top of the aircraft, which is not accessible to the general public. The Occupational risk will be controlled by turning the system off prior to performing any antenna maintenance, accessing the top of the aircraft near the antenna, or operating personnel lifts or other similar equipment in the vicinity of the antenna hazard zone defined in this report.


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