Attachment HDNetSprinter01RadB.

This document pretains to SES-LIC-20120917-00825 for License on a Satellite Earth Station filing.

IBFS_SESLIC2012091700825_966542

Exhibit A Page 1 of 4 Radiation Hazard Study Site: Temporary Fixed (Sprinter01) Applicant: HDNet, LLC Date: Tue Aug 28th 2012

Exhibit A Page 2 of 4 Radiation Hazard Study Radiation Levels Hazard Assessment Region mw/cm2 Far Field Rf = 92.6 meters 8.490 Potential Hazard Near Field Rn = 38.6 meters 1.89 Complies with Guidelines Transisitional Region Rt < 1.89 Complies with Guidelines Rn<Rt<Rf Reflector Surface 7.859 Potential Hazard Between Antenna and Ground .0786 Complies with Guidelines Between Main Reflector and Feed 4386 Potential Hazard Conclusion: Based on the above analysis, it is concluded that harmful levels of radiation will not exist in regions normally occupied by the public or the station's operating personal. The Earth Station and on the antenna itself, will be marked with the standard radiation hazard warnings warning personal to avoid the area in front of the reflector when the transmitter is operational. To ensure compliance with the safety limits, the earth station's transmitter will be turned off whenever maintenance and repair personal are required to work in the area where the radiation level exceeds or could exceed the recommended guidelines. Additionally, the earth station will be secured and it's access will be controlled.

Exhibit A Page 3 of 4 Supporting Calculations Ref: FCC Bulletin #65 A: Far Field 0.6D2 0.6x 1.82 Rf = = =93 meters  0.021 ant gaindb 46.6 G=10 10 =10 10 =4.57x10 4 4 PG 200x4.57x10 2 S= 2 = 2 =84.9W /m 4 R 4  93 2 S=8.49W / cm B: Near Field D2 1.82 Rf = = =38.6 meters 4  4 x0.021 16 nP 16 .6200 2 S= 2 = 2 =188.6W /m D 1.8 S=1.89mW /cm2 C: Transitional Region Since the transitional extends between Rn and Rf, the power density can never exceed the power density of the near field S nf  Rnf  S= R D: Reflector Surface With even distribution of energy over the surface of the dish, 3 P 200x10 S= 2 = 2 2 =7.8595 mW /cm2  r  .9 x10 

Exhibit A Page 4 of 4 E: Beween Antenna and Ground The nearest point is more then 1 times diameter removed from the center of the main beam S reflector Surface S= = .0786/cm2 100 F: Between Main Reflector and Feed The diameter of the feed aperture is 7.62cm. The highest density will be at the aperture P 200x103 S= 2 = = 4386mw/cm2 r  3.18 2


Document Created: 2019-04-20 05:00:36
Document Modified: 2019-04-20 05:00:36
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