Attachment radiation Hazard Stu

This document pretains to SES-MOD-INTR2018-01580 for Modification on a Satellite Earth Station filing.

IBFS_SESMODINTR201801580_1395606

Radiation Hazard Study General Dynamics/Prodelin 1244, 2.4 Meter Antenna, C Band All of the Equations below use the following units! Antenna Gain 42dbi = 15848.93 @ 6.175GHz Power to feed Max +25.11DBW 325 watts Antenna diameter 2.4 meters Distance to satellite 39,000 KM or 39,000,000 meters  = wavelength @ 6.175GHz (.048582995941) meters Equations from OET Bulletin #65, oet65.pdf Page # 27 equation #11 Antenna surface P = Power to feed in Watts (325) A = Antenna diameter in Meters (2.4) S (surface) = 541.66 Page # 27 equation #12 Extent of Near field D = Antenna diameter in Meters (2.4)  = Wavelength in Meters using midband frequency of 6.175GHz (.048582995941) Rnf = 29.64 Page # 28 equation #13 & 14 Max near field power density & Aperture efficiency P = Power to feed in Watts (325) D = antenna diameter in Meters (2.4)  = Wavelength in Meters using midband frequency of 6.175GHz (.048582995941) Snf = 189.09 Aperture efficiency = .658 Page # 29 Equation #16 Distance to beginning of far field D = Antenna diameter in Meters (2.4)  = Wavelength in Meters using midband frequency of 6.175GHz (.048582995941) Rff = 71.13 Page # 29 Equation #17 Transition region distance between Rnf - Rff 71.13 - 29.64 Page # 29 Equation # 18 Power density S = Power density at a distance of (39,000 KM) P = Power to feed in Watts (325) R = Distance in Meters to Satellite (39,000,000) Sff = 2.6949102 -10 Watts or -95.67 dbw/m squared Via Sky Communications E000281

Radiation Hazard Study General Dynamics/Prodelin 1244, 2.4 Meter Antenna, KU Band All of the Equations below use the following units! Antenna Gain 49.2dbi = 83176.37 @ 14.25GHz Power to feed Max +27DBW 500 watts Antenna diameter 2.4 meters Distance to satellite 39,000 KM or 39,000,000 meters  = wavelength @ 14.25GHz .0210526 meters Equations from OET Bulletin #65, oet65.pdf Page # 27 equation #11 Antenna surface P = Power to feed in Watts (500) A = Antenna diameter in Meters (2.4) S (surface) = 833.3 Page # 27 equation #12 Extent of Near field D = Antenna diameter in Meters (2.4)  = Wavelength in Meters using midband frequency of 14.25GHz (.0210526) Rnf = 68.4 Page # 28 equation #13 & 14 Max near field power density & Aperture efficiency P = Power to feed in Watts (500) D = antenna diameter in Meters (2.4)  = Wavelength in Meters using midband frequency of 14.25GHz (.0210526) Snf = 286.47 Aperture efficiency = .648 Page # 29 Equation #16 Distance to beginning of far field D = Antenna diameter in Meters (2.4)  = Wavelength in Meters using midband frequency of 14.25GHz (.0210526) Rff = 164.16 Page # 29 Equation #17 Transition region distance between Rnf - Rff 164.16 - 68.4 Page # 29 Equation # 18 Power density S = Power density at a distance of (39,000 KM) P = Power to feed in Watts (500) R = Distance in Meters to Satellite (39,000,000) Sff = 2.17585 –9 Watts or -86.62 dbw/m squared Via Sky Communications E000281


Document Created: 2018-05-15 01:29:19
Document Modified: 2018-05-15 01:29:19
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