Attachment Coordination &RadHaz

This document pretains to SES-STA-20190712-00914 for Special Temporal Authority on a Satellite Earth Station filing.


                         Micronet Communications, Inc.
                                     812 Lexington Dr
                                    Plano, Texas 75075
                                       972-422-7200

                            SUPPLEMENTAL SHOWING PART 101.103(D)

File Number: M1916411                   5.93 GHz
Licensee: Alaska Communications Internet, LLC                                  Page 1
_____________________________________________________________________________________

Pursuant to Parts 25.203 and 101.103(d) of the FCC Rules and Regulations, a frequency
coordination study was conducted by Micronet Communications, Inc. for the following
proposed earth station:

  Chugachmuit Chenega, AK

The results of the study indicate that no unacceptable interference will result with
existing, proposed or prior coordinated radio facilities.

Coordination was performed with existing, proposed and prior coordinated carriers
within coordination range on the following dates:

  06/25/2019   Original PCN (Expedited response requested by 07/09/2019)
               There were no unresolved interference objections.

The attached coordination data was forwarded on the latest date to the following
parties within coordination range or their authorized coordination agents:

     ALASCOM, INC.
     ALASKA, STATE OF
     CHUGACH ELECTRIC ASSOCIATION, INC.
     COMSEARCH INC
     COPPER VALLEY TELEPHONE COOPERATIVE, INC.
     COPPER VALLEY WIRELESS, LLC
     MICRONET COMMUNICATIONS INC


                                            Respectfully Submitted,




                                            Jeremy Lewis
                                            Systems Engineer

Attached: 1 data sheet


                               Micronet Communications, Inc.
                                     812 Lexington Dr
                                    Plano, Texas 75075
                                       972-422-7200

File: M1916411

==========================================================================
          TECHNICAL CHARACTERISTICS OF TRANSMIT ONLY EARTH STATION
==========================================================================

Company:                        Alaska Communications Internet, LLC
Site Name, State:               Chugachmuit Chenega, AK
Call Sign:
Latitude                          (NAD83)        60   3 56.3 N
Longitude                         (NAD83)       148   1   1.6 W
Elevation AMSL                    (ft/m)        40.00        12.19
Receive Frequency Range           (MHz)
Transmit Frequency Range          (MHz)        5925-6425
Range of Satellite Orbital Long. (deg W)       114.00       115.00
Range of Azimuths from North      (deg)        142.09       143.14
Antenna Centerline                (ft/m)         5.91         1.80
Antenna Elevation Angles          (deg)         16.09        16.41

--------------------------------------------------------------------------
Equipment Parameters                           Transmit
--------------------------------------------------------------------------

Antenna Gain, Main Beam             (dbI)        42.00
15 DB Half Beamwidth                (deg)         3.10

Antennas         Transmit: GENERAL DYNAMICS 1241 (2.4M)

Max Transmitter Power               (dbW/4KHz)                 -14.95
Max EIRP Main Beam                  (dbW/4KHz)                  27.05
Modulation / Emission Designator     DIGITAL   5M60G7W

--------------------------------------------------------------------------
Coordination Parameters                        Transmit
--------------------------------------------------------------------------

Max Greater Circle Distances        (km)         124.63
Max Rain Scatter Distances          (km)         100.00
Max Interference Power Long Term    (dbW)       -154.80
Max Interference Power Short Term   (dbW)       -130.80
Rain Zone / Radio Zone                            3             A


                    ANALYSIS OF NON-IONIZING RADIATION
                  for Alaska Communications Internet LLC
                   Site: Chugachmuit Chenega State: AK
           Latitude: 60 3 56.3 Longitude: 148 1 1.6 (NAD83)
                                07-12-2019

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) = 2.4000 m

Antenna Surface Area             (Sa) =   pi(D**2)/4        = 4.5239 m**2

Wavelength at 6.1750 GHz     (lambda) = 0.0485 m

Transmit Power at Flange          (P) = 40.0000 Watts

Antenna Gain at Earth Site      (GES) = 42.0000 dBi     =     15848.9319
                                                                 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)    = 71.2577 m
                                         ---------
                                          lambda


Far Zone Power Density        (Rf) =     (GES)(P)     = 9.9354 W/m**2
                                       ------------
                                       4*pi*(Df**2)
                                                      = 0.9935 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       = 29.6907 m
                                         --------
                                         4*lambda


Near Zone Power Density       (Rn) =     16.0(n)P     = 21.2207 W/m**2
                                         --------
                                         pi(D**2)

                                                      = 2.1221 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)       = 17.6839 W/m**2
                                           ----
                                            Sa
                                                      = 1.7684 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        = 8.8419 W/m**2
                                            ----
                                             Sa
                                                      = 0.8842 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                             4.0065    Complies with ANSI

2.   Near Zone                          2.8779    Complies with ANSI

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

4.   Main Reflector Surface             3.2316    Complies with ANSI

5.   Main Reflector to Ground           4.1158    Complies with ANSI



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

                                     Safety
     Zones                           Margins      Conclusions
                                    (mW/cm**2)
----------------------------       ------------   ----------------------------
1. Far Zone                             0.0065    Complies with ANSI

2.   Near Zone                         -1.1221    POTENTIALLY HAZARDOUS

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

4.   Main Reflector Surface            -0.7684    POTENTIALLY HAZARDOUS

5.   Main Reflector to Ground           0.1158    Complies with ANSI




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

A. Controlled Environment
B. Uncontrolled Environment
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.



Document Created: 2019-07-12 16:36:16
Document Modified: 2019-07-12 16:36:16

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