Attachment Radiation Hazard

This document pretains to SES-LIC-20170710-00746 for License on a Satellite Earth Station filing.

IBFS_SESLIC2017071000746_1230834

                    ANALYSIS OF NON-IONIZING RADIATION
                       for SKYVIEW SATELLITE NETWORK
                    Site: Scottsdale Uplink State: AZ
          Latitude: 33 37 1.0 Longitude: 111 55 14.5            (NAD83)
                                05-24-2017

The Office of Science and Technology Bulletin, No. 65, October
1985 and revised August 1997, specifies that the maximum level
of non-ionizing radiation that a person may be exposed to over a
six minute period is an average power density equal to 5 mW/cm**2
(five milliwatts per centimeter squared) for a controlled
environment. For an uncontrolled environment, the maximum level
of non-ionizing radiation that a person may be exposed to over a
thirty minute period is an average power density equal to 1 mW/cm**2
(one milliwatt per centimeter squared). It is the purpose of this
report to determine the maximum power flux densities of the earth
station in the far zone, near zone, transition zone, at the main
reflector surface, and between the antenna edge and the ground.


Parameters which were used in the calculations:
===============================================

Antenna Diameter,                 (D) = 4.2000 m

Antenna Surface Area             (Sa) =   pi(D**2)/4         = 13.8544 m**2

Wavelength at 6.1750 GHz     (lambda) = 0.0485 m

Transmit Power at Flange          (P) = 250.0000 Watts

Antenna Gain at Earth Site      (GES) = 46.4000 dBi      =     43651.5832
                                                                  Power Ratio:
                                                                 AntiLog(GES/10)
pi                                    =    3.1415927

Antenna Aperture Efficiency       (n) = 0.6000


1. FAR ZONE CALCULATIONS
========================

Distance to the Far Zone      (Df) =     (n)(D**2)    = 218.2268 m
                                         ---------
                                          lambda


Far Zone Power Density        (Rf) =     (GES)(P)     = 18.2353 W/m**2
                                       ------------
                                       4*pi*(Df**2)
                                                      = 1.8235 mW/cm**2




2. NEAR ZONE CALCULATIONS
=========================

Power Flux Density is considered to be at a maximum value
throughout the entire length of this Zone. The Zone is
contained within a cylindrical volume which has the same diameter
as the antenna. Beyond the Near Zone, the Power Flux Density
will decrease with distance from the Antenna.

Distance to the Near Zone     (Dn) =       D**2       = 90.9278 m
                                         --------
                                         4*lambda


Near Zone Power Density       (Rn) =     16.0(n)P     = 43.3075 W/m**2
                                         --------
                                         pi(D**2)

                                                      = 4.3307 mW/cm**2




3. TRANSITION ZONE CALCULATIONS
===============================

The Power Density begins to decrease with distance in the
Transition Zone. While the Power Density decreases inversely with
distance in the Transition Zone, the Power Density decreases
inversely with the square of the distance in the Far Zone.
Since the maximum Power Density in the Transition Zone will not
exceed the Near Zone values, it is not calculated.


4. MAIN REFLECTOR ZONE
======================

Main Reflector Power Density       =       2(P)       = 36.0896 W/m**2
                                           ----
                                            Sa
                                                      = 3.6090 mW/cm**2




5. ZONE BETWEEN THE MAIN REFLECTOR AND THE GROUND
=================================================

Applying uniform illumination of the Main Reflector Surface:

Main to Ground Power Density       =         P        = 18.0448 W/m**2
                                            ----
                                             Sa
                                                      = 1.8045 mW/cm**2


                       CALCULATED SAFETY MARGINS SUMMARY
                                 AND EVALUATION

--------------------------------------------------------------------------
  Controlled Safety Margin = 5.0 - Calculated Zone Value (mW/cm**2)
--------------------------------------------------------------------------

                                     Safety
     Zones                           Margins      Conclusions
                                    (mW/cm**2)
----------------------------       ------------   ----------------------------
1. Far Zone                             3.1765    Complies with ANSI

2.   Near Zone                          0.6693    Complies with ANSI

3.   Transition Zone               Rf < Rt < Rn   Complies with ANSI

4.   Main Reflector Surface             1.3910    Complies with ANSI

5.   Main Reflector to Ground           3.1955    Complies with ANSI



--------------------------------------------------------------------------
  Uncontrolled Safety Margin = 1.0 - Calculated Zone Value (mW/cm**2)
--------------------------------------------------------------------------

                                     Safety
     Zones                           Margins      Conclusions
                                    (mW/cm**2)
----------------------------       ------------   ----------------------------
1. Far Zone                            -0.8235    POTENTIALLY HAZARDOUS

2.   Near Zone                         -3.3307    POTENTIALLY HAZARDOUS

3.   Transition Zone               Rf < Rt < Rn   Complies with ANSI

4.   Main Reflector Surface            -2.6090    POTENTIALLY HAZARDOUS

5.   Main Reflector to Ground          -0.8045    POTENTIALLY HAZARDOUS




6. EVALUATION
==============

A. Controlled Environment
B. Uncontrolled Environment
The FAR ZONE does not comply with the ANSI standards!
The system will be FENCED so that no one can enter the affected Zone while
the system is in use. Additionally, the system will be shut down for
servicing.

The NEAR ZONE does not comply with the ANSI standards!
The system will be FENCED so that no one can enter the affected Zone while
the system is in use. Additionally, the system will be shut down for
servicing.

The MAIN Reflector Surface ZONE does not comply with the ANSI standards!
The system will be FENCED so that no one can enter the affected Zone while


the system is in use.   Additionally, the system will be shut down for
servicing.

The MAIN Reflector to GROUND ZONE does not comply with the ANSI standards!
The system will be FENCED so that no one can enter the affected Zone while
the system is in use. Additionally, the system will be shut down for
servicing.



Document Created: 2017-05-24 09:58:03
Document Modified: 2017-05-24 09:58:03

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