Attachment RADHAZ SES-LIC-20150608-00330

Attachment RADHAZ

This document pretains to SES-LIC-20150608-00330 for License on a Satellite Earth Station filing.

IBFS_SESLIC2015060800330_1089973

du Treil, Lundin & Rackley, Inc.
Consulting Engineers

RF HAZARD STATEMENT
LESEA BROADCASTING CORPORATION
APPLICATION FOR A NEW
TEMPORARY FIXED EARTH STATION

This RF Hazard Statement was prepared on behalf of LeSea Broadcasting
Corporation in support of an evaluation of the radio frequency (RF) environment in the
vicinity of the antenna of a temporary fixed earth station to be employed for satellite
news gathering (SNG). This statement details compliance with Section 1.1307(b) of the
FCC Rules concerning human exposure RF energy. This statement also details the RF
safety work rules for the safe operation of the proposed SNG facility.

Background

The proposed facility will transmit in the Ku Band with a maximum EIRP
of 71.8 dBW. The facility will employ an AvL Technologies model 2400 2.4-meter
aperture antenna, which will be mounted on the roof of a custom built production vehicle
based on a Ford F-550 truck chassis. When operational, the antenna center of radiation
will be located 5.0 m above ground level.

Calculated RF Exposure Levels

Calculations of RF exposure were conducted pursuant to the FCC’s OET
Bulletin No. 65, Evaluating Compliance with FCC Guidelines for Human Exposure to
Radiofrequency Electromagnetic Fields. Personnel in proximity of the transmitting
antenna will be located inside the vehicle or around the outside of the vehicle at ground
level. Work rules, further detailed below, prohibit personnel to be on or near the roof of
the vehicle when the antenna is operational.

1

$du Treil, Lundin & Rackley, Inc. Consulting Engineers All areas near the antenna, inside the vehicle, or about the vehicle at ground level, are within the near field region of the antenna. Using Equation 13 of OET Bulletin 65, the maximum near field, on-axis, power density level in the main beam of the antenna is calculated as follows: 16P S nf  D 2 where,  = aperture efficiency = 0.59 P = power fed to antenna = 200,000 mW D = diameter of antenna = 240 cm and, therefore, Snf = 10.5 mW/cm2. At one antenna diameter distance (2.4 m) off-axis from the antenna main beam, the power density level would be at least a factor of 20 dB less than the equivalent value calculated in the main beam.* This gives an RF energy level of less than 0.11 mW/cm2 at 2 m above ground around the vehicle. Furthermore, RF energy levels at locations within the vehicle will be well attenuated below this level by the metallic skin of the vehicle. While electromagnetic wave diffraction will occur off the edges of the vehicle the diffraction levels will be attenuated significantly below the incident RF levels. The FCC maximum permissible exposure (MPE) levels for the 14,000- 14,500 MHz (Ku Band) are 5 mW/cm2 for occupational / controlled environments and 1 mW/cm2 for general population / uncontrolled exposure. Thus, RF energy levels within and about the SNG vehicle at ground level will be well below the FCC MPE for general population / uncontrolled environments. Therefore, the proposed facility meets the requirements of Section 1.1307(b) concerning human exposure to RF energy. * See ¶2 on Page 31 of OET Bulletin No. 65. 2$

Document Created: 2015-06-04 13:05:25
Document Modified: 2015-06-04 13:05:25