Attachment Revised Rad Had

This document pretains to SES-MOD-20051007-01380 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2005100701380_460386

FCC OET-65 RF Exposure Study - Satellite Uplink Facility WVIT Modified Uplink Facility E873926 – 1.5 meter SNG antenna w/ 80 watt antenna mounted amplifier FCC Maximum Permissible Exposure Levels Source Units Notes Public/uncontrolled area exposure limit 47CFR §1.1310 1 mW/cm2 Occupational/controlled area exposure limit 47CFR §1.1310 5 mW/cm2 Input Data Antenna Diameter datasheet 150.0 cm Antenna surface area calculated 17671 cm2 Feed flange diameter measured 6.350 cm Feed flange area calculated 32 cm2 Frequency (entry) 14000 MHz Wavelength (speed of light = 299,792,458 m/s) calculated 2.141 cm Transmit power at flange datasheet 80000 milliwatts Antenna gain datasheet 45.3 dBi Antenna gain factor calculated 33884 Height of base of antenna above ground measured 2.76 m Height of center of antenna above ground measured 3.51 m Minimum Elevation Angle (entry) 5 degrees Minimum Elevation Angle calculated 0.08727 radians FCC Maximum Permissible Exposure (MPE) Results calculated using FCC Bulletin OET-65 (Edition 97-01 August 1997) Uncontrolled Controlled Maximum power density at antenna surface Eq. 11 Pg 27 18.11 mW/cm2 Potential Hazard Potential Hazard Power density at feed flange Eq. 11 Pg 27 10104.45 mW/cm2 Potential Hazard Potential Hazard Extent of near-field Eq. 12 Pg 27 2627 cm Maximum new-field power density Eq. 13 Pg 28 12.67 mW/cm2 Potential Hazard Potential Hazard Aperture efficiency Eq. 14 Pg 28 0.7 Distance to beginning of far-field Eq. 16 Pg 29 6304.36 cm Power density at end of the transition regiion Eq. 17 Pg 29 5.28 mW/cm2 Potential Hazard Potential Hazard Maximum far-field power density Eq. 18 Pg 29 5.427 mW/cm2 Potential Hazard Potential Hazard Main Beam Far-field region safe exposure distances Minimum distance for public/uncontrolled exposure Eq. 18 Pg 29 146.87 meters Height at minimum antenna elevation angle calculated 16.31 meters Horizontal distance calculated 146.31 meters Minimum distance for occupational/controlled exposure Eq. 18 Pg 29 65.68 meters Height at minimum antenna elevation angle calculated 9.23 meters Horizontal distance calculated 65.43 meters Off-Axis Near Field/Transition Region safe exposure distances from antenna (20 dB reduction in power density at distances greater than one antenna diameter from the main beam center.) OET-65 Pg 30 Maximum off-axis near field power density Eq. 13 Pg 28 0.1267 mW/cm2 Below FCC MPE Below FCC MPE Public/uncontrolled exposure off-axis distance Diam/or Eq 17 1.5 meters Occupatonal/controlled exposure off-axis distance Diam/or Eq 17 1.5 meters Off-Axis Far Field safe exposure distances from the antenna (Based on side lobe attenuation required by FCC 25.209(a)(2)) Angle off main beam axis (1 to 48 degrees) (entry) 5 degree(s) Off-axis antenna gain factor OET-65 Pg 30* 28 Minimum distance for public/uncontrolled exposure Eq. 18 Pg 29 ** 63.04 meters * Gain converted from dBi to linear multiple ** If calculated distance is less than the start of the far field region, the distance to the start of the far field region is shown. Prepared by Doug Lung, October 19, 2005


Document Created: 2005-10-20 10:59:56
Document Modified: 2005-10-20 10:59:56
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