Attachment E100091EMCStudy.pdf

This document pretains to SES-MFS-20110311-00285 for Modification w/ Foreign Satellite (earth station) on a Satellite Earth Station filing.

IBFS_SESMFS2011031100285_880201

f 19700 Janelia Farms Bivd Ashburn, VA 20147 703—726—5500 CoOMSEARCH Analysis of Potential RADAR Interference Issues for BEGAN Operations at the Hawaii Pacific Teleport (HPT) Background: HPT is considering the installation of a 13—meter C—Band earth station at the HPT to support BEGAN INMARSAT operations. The BEGAN operations will require the earth station to operate in the extended reception band of 3550 — 4200 MHz. In addition the HPT will have to install INMARSAT terminals to support L—Band INMARSAT operations. The issues that are addressed in this analysis are the potential interference conditions that may occur at the HPT to the operation of the C—Band earth station and the INMARSAT terminals and how these conditions can be dealt with. Discussion: The electromagnetic environment at the HPT that may cause interference to the extended band operation of the C—Band earth station is the result of U. S. Military RADAR‘s operating in the vicinity of the HPT. These RADARs are mainly installed on ships that operate off the coast of Hawaii and as they enter the naval base at Pearl Harbor, and they may also be installed at land based sites. The following is a list of the RADAR‘s, that have been given fictitious names in this report for security reasons, that are potential interferers: RADAR A RADAR B RADAR C RADAR D RADARE RADARF FAA RADAR All of these RADAR‘s operate in the frequency band directly adjacent to and below the band of operation of the proposed 13—meter earth station. However, there are two ways they pose an interference threat. First, their high peak power can saturate the front end of the earth station receiver, and secondly, their spectrum roll—off side lobes fall into the pass band of the earth station receiver and are a worse case threat to the lower portion of the proposed earth station reception band. Additionally, FAA RADAR operations from the Honolulu Airport may disrupt the operation of the INMARSAT terminals to be installed at the HPT. Figures 1 and 2 show the relative locations of the ship and land based RADAR locations with respect to the HPT selected for the analysis in this report. Earth Station System Parameters: Two earth station systems at the HPT are considered in this analysis; the 13—meter C—Band earth station and the L—Band INMARSAT Terminal. Table 1 contains the operating parameters for the C—Band earth station and Table 2 contains the operating parameters for INMARSAT Terminal.

Table 1 C—Band Earth Station Operating Parameters and Coordination Data SATELLITE EARTH STATION FREQUENCY COORDINATION DATA 05/10/2006 Company Hawaii Pacific Teleport, L.P. Earth Station Name, State KAPOLEI, HI Latitude (DMS) (NAD83) 21 20 9.0 N Longitude (DMS) (NADS3) 158 5 25.0 W Ground Elevation AMSL (Ft/m) 120.02 / 36.58 Antenna Centerline AGL (Ft/m) 31.99 / 9.75 Receive Antenna Type: Vertex RSI 4.0 GHz Gain (dBi) / Diameter (m) 53.5 / 13.0 3 dB / 15 dB Half Beamwidth 0.19 / 0.38 Transmit Antenna Type: VERTEX RSI 6.0 GHz Gain (dBi) / Diameter {m) 5s6e.8 / 13.0 3 dB / 15 dB Half Beamwidth o.13 / 0.26 Operating Mode TRANSMIT AND RECEIVE Modulation DIGITAL Emission / Receive Band (MHz) 51K2G7W — 36MOGTW / 3550.00 — 4200.00 Emission / Transmit Band (MHz) 51K2G7W — 36M0G7W / 5850.00 — 6425.00 Max. Available RF Power (dBW)/4 kHz) —2.70 (dBW) /MHz) 21.30 Max. EIRP (dBW)/4 kHz) 54.10 (dBw) /MHz) 78.10 Max permissible Interference Power 4.0 GHz, 20% (dBW/1 MHz) —156.0 4.0 GHz, 0.0100% (dBw/1 MHz) —146.0 6.0 GHz, 20% (dBW/4 kHz) —154.0 6.0 GHz, 0.0025% (dBw/4 kHz) —131.0 Range of Satellite Arc (Geostationary) Degrees Longitude 98.0 w / 216.5 W Azimuth Range (Min/Max) l01.8 / 257.1 Corresponding Elevation Angles 19.5 / 21.6 Radio Climate [ Rain Zone 4 Max Great Circle Coordination Distance (Mi/Km) 4.0 CGHz 579.9 / 933.4 6.0 GHz 269.7 / 434.1

Precipitation Scatter Contour Radius (Mi/Km) 4.0 GHz 229.5 / 369. 4 6.0 GHz 62.1 / 100 .0 Table of Earth Station Coordination Values os/10/2006 Earth Station Name KAPOLEI HI Owner Hawaii Pacific Teleport, L.P. Latitude (DMS) (NAD83) 21 20 9.0 N Longitude (DMS) (NAD83)158 5 25.0 W Ground Elevation (Ft/m) 120.02 / 36.58 AMSL Antenna Centerline (Ft/m) 31.99 / 9.75 AGL Objectives: Receive —156.0 (dBW /1 MHz) Transmit —154.0 (dBW /4 kHz) TX Power —2.7 (dBW/4 kHz) Azimuth Horizon Antenna 4.0 CHz 6.0 GHz (Deg) Elevation Disc. Antenna Coordination Antenna Coordination Angle Angle Gain Distance Gain Distance (Deg) (Deg) (dBi) (Km) (dBi) (Km) 0 9.56 101.64 —10 .00 100 .0 —10 .00 100 .0 5 7.65 96 .68 —10 .00 119.9 —10.00 100 .0 10 7. 42 91.78 —10 .00 122.3 —10 .00 100 .0 15 7.64 86.89 —10 .00 120 .0 —10 .00 100 .0 20 7.02 82.02 —10.00 126 .6 —10 .00 100 .0 25 6.32 77.17 —10.00 134.1 —10.00 100 .0 30 5.81 72.36 —10.00 142.0 —10 .00 100 .0 35 5.13 67.59 —10.00 157.8 —10 .00 100 .0 40 4 .12 62 .91 —10 .00 171.6 ~10 .00 100 .0 45 3.43 58.27 —10.00 195.3 —10 .00 100 .0 50 3.12 53.63 —10.00 208.3 —10 .00 100 .0 55 2.84 49.03 —10 .00 223.5 —10.00 100 .0 60 2.36 44 .59 —9.23 262 .0 —9.23 100 .0 65 2.12 40.18 —8.10 289 .0 —8 .10 109.3 70 1.91 35 .90 —6.88 318 .2 —6.88 127.3 75 1.70 31.81 —5.56 351.6 ~5.56 149.0 80 1.34 28 .09 —4 .21 411.2 —4.21 184.3 85 0 .75 24 .97 ~2.94 556.9 —2 .94 251.1 90 0 .00 22.67 —1.88 892.6 —1.88 408 .6 95 0 .00 20 .60 —0 .84 918 .9 —0 .84 422 .7 100 0 .00 19.56 —0 .28 933 .4 —0 .28 434 .0 105 0 .00 19.73 —0 .38 931.0 —0 .38 432.8 110 0 .00 21.06 —1.09 912.7 —1.09 419.3 115 0 .00 23 .37 —2.22 884.3 —2.22 404 .2 120 0 .00 26.40 —3.54 852.1 —3.54 387.1 125 0 .00 29 .92 —4 .90 820 .0 —4 .90 370.3 130 0 .00 33.79 —6.22 793 .1 —6.22 354 .8 135 0 .00 37 .90 —7.47 765.5 —7.47 340 .9 140 0 .00 42 .16 —8.62 740.3 —8 .62 328 .6 145 0 .00 46 .33 —9.65 718 .4 —9.65 318 .1 150 0 .00 50 .34 —10.00 710.9 ~10 .00 314.6 1

155 0 .00 54.11 —10.00 710 .9 —10 .00 314 .6 160 0 .00 57.56 —10.00 710 .9 —10 .00 314.6 165 0 .00 60.55 —10.00 710 .9 —10 .00 314.6 170 0 .00 62 .92 —10.00 710 .9 —10 .00 314.6 175 0 .00 64.46 —10 .00 710 .9 —10 .00 314.6 180 0 .00 65.00 —10.00 710 .9 —10.00 314.6 Table of Earth Station Coordination Values os/10/2006 Earth Station Name KAPOLEI HI Owner Hawaii Pacific Teleport, L.P. Latitude (DMS) (NAD83) 21 20 9.0 N Longitude (DMS) (NAD83)158 5 25.0 W Ground Elevation (Ft/m) 120.02 / 36.58 AMSL Antenna Centerline (Ft/m) 31.99 / 9.75 AGL Objectives: Receive —156.0 (dBW /1 MHz) Transmit —154.0 (dBW /4 kHz) TX Power —2.7 (dBw/4 kHz) Azimuth Horizon Antenna 4.0 GHz 6.0 CGHz (Deg) Elevation Disc. Antenna Coordination Antenna Coordination Angle Angle Gain Distance Gain Distance (Deg) (Deg) (dBi) (Km) (dBi) (Km) 185 0 .00 64.46 —10 .00 710 .9 —10.00 314.6 190 0 .00 62.92 ~10.00 710 .9 —10 .00 314.6 195 0 .00 60.55 —10 .00 710 .9 —10 .00 314.6 200 0 .00 57.56 —10.00 710 .9 —10 .00 314.6 205 0 .00 54.11 —10 .00 710 .9 —10.00 314.6 210 0 .00 50 .34 ~10.00 710 .9 —10 .00 314.6 215 0 .00 46 .33 —9.65 718 .4 —9.65 318.1 220 0 .00 42.16 —8 .62 740.3 —8 .62 328 .6 225 0 .00 38 .06 —7.51 764.5 —7.51 340 .4 230 0 .00 34 .16 —6.34 790 .5 —6.34 353.5 235 0 .00 30.53 —5.12 815.0 —5.12 367 .7 240 0 .00 27.30 —3.90 843.4 —3.90 382.5 245 0 .00 24 .62 —2.78 870.5 ~2.78 396 .8 250 0 .00 22 .67 —1.89 892.5 —1.89 408.5 255 0 .00 21.68 —1.40 904 .8 —1.40 415.1 260 0 .00 21.75 —1.44 903. 8 —1.44 414 .6 265 0 .00 22 .90 —1.99 889 .9 ~1.99 407 .1 270 0 .00 24 .96 —2.93 866 .9 —2.93 394 .9 275 0 .00 27 .73 —4.07 839.4 —4.07 380 .4 280 0 .00 31.03 —5.29 811.0 —5.29 365 .7 285 0 .00 34 .69 —6.51 786 .7 —6.51 351.6 290 0 .22 38 .52 —7.64 747 .7 —7.64 332.1 295 0 .52 42 .54 ~8.72 537.0 —8.72 240 .6 300 1.11 46. 62 —9.71 377.3 ~9.71 162 .8 305 1.76 50.85 —10 .00 305 .7 —10 .00 118 .0 310 2.72 55.15 —10.00 231.8 —10 .00 100 .0 315 3.08 59.69 —10 .00 209 .7 —10.00 100 .0

320 3.57 64 .28 —10 .00 189 .7 —10 .00 100 .0 325 4 .23 68 .91 —10 .00 170 .2 —10.00 100 .0 330 4.76 73.61 —10.00 163.9 —10.00 100 .0 335 5.26 78.35 —10 .00 154 .8 —10.00 100 .0 340 5.96 83.12 —10 .00 138 .6 —10.00 100 .0 345 6.54 87.93 —10 .00 131.7 ~10.00 100 .0 350 8.25 92 .78 —10.00 112.4 —10.00 100 .0 355 10 .32 97.70 ~10.00 100 .0 —10 .00 100 .0 Table 2 INMARSAT Terminal Operating Parameters And Cordination Data SATELLITE EARTH STATION FREQUENCY COORDINATION DATA 05/10/2006 Company Hawaii Pacific Teleport, L.P. Earth Station Name, State KAPOLEI, HI Latitude (DMS) (NADS3) 21 20 9.0 N Longitude (DMS) (NADS3) 158 5 25.0 W Ground Elevation AMSL (Ft/m) 120.02 / 36.58 Antenna Centerline AGL (Ft/m) 31.99 / 9.75 Receive Antenna Type: 1.5.0 GHz Gain (dBi) / Diameter (m) 45.0 / 13.0 3 dB / 15 dB Half Beamwidth 0.19 / 0.38 Operating Mode RECEIVE ONLY Modulation DIGITAL Emission / Receive Band (MHz) 36MOFBW / 1525.00 — 1559.00 Max permissible Interference Power 1.5 GHz, 20% (dBW/1 MHz) —156.0 1.5 GHz, 0.0100% (dBW/1 MHz) —146.0 Range of Satellite Arc (Geostationary) Degrees Longitude 98.0 W / 216.5 W Azimuth Range (Min/Max) 101.8 / 257.1 Corresponding Elevation Angles 19.5 / 21.6 Radio Climate C Rain Zone 4 Max Great Circle Coordination Distance (Mi/Km) 1.5 GHz 934.1 / 1503.5 Precipitation Scatter Contour Radius (Mi/Km) 1.5 GHz 230.3 / 370 .6 Table of Earth Station Coordination Values 05/10/2006 Earth Station Name KAPOLEI HI Owner Hawaii Pacific Teleport, L.P.

Latitude (DMS) (NADS83) 21 20 9.0 N Longitude (DMS) (NAD83)158 5 25.0 W Ground Elevation (Ft/m) 120.02 / 36.58 AMSL Antenna Centerline (Ft/m) 31.99 / 9.75 AGL Objectives: Receive —156.0 (dBW /1 MHz) Azimuth Horizon Antenna 1.5 GHz (Deg) Elevation Disc. Antenna Coordination Angle Angle Gain Distance (Deg) (Deg) (dBi) (Kma) 0 9.56 101.64 —10.00 161.9 5 7.65 96.68 —10.00 197 .2 10 7. 42 91.78 —10 .00 200 .4 15 7.64 86.89 —10.00 197 .4 20 7.02 82.02 ~10 .00 206 .2 25 6.32 77.17 —10 .00 216 .4 30 5.81 72.36 —10 .00 227 .0 35 5.13 67.59 —10 .00 247 .2 40 4 .12 62.91 —10.00 266 .5 45 3.43 58.27 —10 .00 299.9 50 3.12 53.63 ~10.00 318 .4 55 2.84 49 .03 —10 .00 339.3 60 2.36 44 .59 —9.23 397 .4 65 2.12 40 .18 —8 .10 438 .2 70 1.91 35.90 —6.88 478 .6 75 1.70 31.81 —5.56 538 .8 80 1.34 28 .09 —4 .21 649.1 85 0 .75 24 .97 —2.94 904 .3 90 0 .00 22.67 —1.88 1435 .6 95 0 .00 20 .60 —0 .84 1479 .4 100 0 .00 19.56 —0 .28 1503.5 105 0 .00 19.73 —0 .38 1499.5 110 0 .00 21.06 —1.09 1469 .0 115 0 .00 23.37 —2.22 1421.9 120 0 .00 26 .40 —3.54 1368 .7 125 0 .00 29 .92 —4 .90 1316 .3 130 0 .00 33.79 ~6.22 1267 .7 135 0 .00 37 .90 —7.47 1223.9 140 0 .00 42 .16 —8 .62 1184 .9 145 0 .00 46 .33 —9 .65 1161.0 150 0 .00 50 .34 —10 .00 1149.6 155 0 .00 54.11 —10 .00 1149.6 160 0 .00 57.56 —10 .00 1149.6 165 0 .00 60.55 —10 .00 1149.6 170 0 .00 62.92 ~10 .00 1149.6 175 0 .00 64.46 —10.00 1149.6 180 0 .00 65.00 —10.00 1149.6 Table of Earth Station Coordination Values os/10/2006 Earth Station Name KAPOLELI HI Owner Hawaii Pacific Teleport, L.P. Latitude (DMS) (NADS83) 21 20 9.0 N

Longitude (DMS) (NAD83)158 5 25.0 W Ground Elevation (Ft/m) 120.02 / 36.58 AMSL Antenna Centerline (Ft/m) 31.99 / 9.75 AGL Objectives: Receive —156.0 (dBW /1 MHz) Azimuth Horizon Antenna 1.5 GHz (Deg) Elevation Disc. Antenna Coordination Angle Angle Gain Distance (Deg) (Deg) (dBi) (Km) 185 0 .00 64.46 —10 .00 1149.6 190 0 .00 62 .92 —10.00 1149.6 195 0 .00 60.55 —10 .00 1149.6 200 0 .00 57.56 —10.00 1149.6 205 0 .00 54.11 —10.00 1149.6 210 0 .00 50 .34 —10 .00 1149.6 215 0 .00 46 .33 —9.65 1161.0 220 0 .00 42 .16 —8 .62 1184.9 225 0 .00 38 .06 —7.51 1222.3 230 0 .00 34.16 —6.34 1263 .5 235 0 .00 30 .53 —5.12 1308 .1 240 0 .00 27 .30 —3.90 1354.5 245 0 .00 24 .62 —2.78 1399.0 250 0 .00 22 .67 —1.89 1435 .4 255 0 .00 21.68 —1.40 1455.8 260 0 .00 21.75 —1.44 1454.2 265 0 .00 22.90 ~1.99 1431.1 270 0 .00 24 .96 —2.93 1393 .0 275 0 .00 27 .73 —4 .07 1347 .9 280 0 .00 31.03 —5.29 1301.7 285 0 .00 34 .69 —6.51 1257.5 290 0 .22 38 .52 —7.64 1195.6 295 0 .52 42 .54 —§ .72 879.6 300 1.11 46 . 62 —9.71 590 .2 305 1.76 50.85 —10 .00 460 .9 310 2.72 55.15 —10.00 351.5 315 3 .08 59.69 —10.00 320.5 320 3.57 64.28 —10 .00 291.9 325 4.23 68 .91 ~10 .00 264 .6 330 4.76 73.61 —10.00 255.5 335 5.26 78.35 —10.00 243.1 340 5.96 83.12 —10.00 222.5 345 6.54 87 .93 ~10.00 213 .2 i 350 8.25 92 .78 —10.00 187 .0 j 355 10.32 97 .70 —10.00 147.8 f RADAR Systems Characteristics: The RADAR system characteristics were taken from NTIA publication and public documents. Table 3 contains the parameters for the RADAR A, Table 4 the RADAR B , Table 5 RADAR C , Table 6 the RADARs D, E and F and Table 7 contains the parameters for the FAA RADAR. Table 3 Operational Parameters of the RADAR A Frequency Range 3000 — 3400 MHz

Transmit Power 1 MW Peak Power 1000 Watts Average Power Emission Level (3550—3700MHz) ~4 dBW/MHz Emission Level (3700 — 4200MHz) —13 dBW/MHz Pulse Width Variable, 1 —10 useconds Pulse Recurring Frequency (PRF) Variable, 100 —1000 pulses per sec Antenna Gain (main beam) 42 dBi, 15,848.9 Antenna (side lobe) — 10 dB, 0.1 Antenna type Phase Array Antenna Motion Electronic Scan Antenna Height 70 ft. AMSL Table 4 Operational Parameters of the RADAR B Frequency Range 3350 — 3550 MHz Transmit Power 750 kW Peak Power 500 Watts Average Power Emission Level (3550—3700MHz) 23.7 dBW/MHz Emission level (3700 — 4200MHz) —11.3 dBW/MHz Pulse Width 1 puseconds Pulse Recurring Frequency (PRF) 1125 pulses per sec Antenna Gain (main beam) 32 dBi, 1,584 (side lobe) — 10 dB, 0.1 Antenna type Reflector Antenna Motion Mechanical Scan Antenna Height 120 ft. AMSL Table 5 Operational Parameters of the RADAR C Frequency Range 2900 — 3100 MHz Transmit Power 1MW Peak Power 1000 Watts Average Power Emission Level (3550—3700MHz) —7 dBW/MHz Emission level (3700 — 4200MHz) —16 dBW/MHz Pulse Width 27 useconds Pulse Recurring Frequency (PRF) 200 pulses per sec Antenna Gain (main beam) 36 dBi, 3981 (side lobe) — 10 dB, 0.1 Antenna type Phase Scan Array Antenna Motion Mechanical Scan Azimuth Electronic Scan Elevation Antenna Height 100 ft. AMSL

Table 6 Operational Parameters of RADARs D, E, and F Frequency Range 2900 — 3100 MHz Transmit Power 0.5MW Peak Power 500 Watts Average Power Emission Level (3550—3700MHz) —10 dBW/MHz Emission Level (3700 — 4200MHz) —19 dBW/MHz Pulse Width 10 puseconds Pulse Recurring Frequency (PRF) 200 pulses per sec Antenna Gain (main beam) 36 dBi, 1,584 (side lobe) — 10 dB, 0.1 Antenna type Phase Scan Array Antenna Motion Mechanical Scan Azimuth Electronic Scan Elevation Antenna Height 100 ft. AMSL Table 7 Operational Parameters of FAA RADAR L—Band Frequency Range 1250 — 1350 MHz Transmit Power 0.5 MW Peak Power 500 Waits Average Power Emission Level (1525—1559MHz) 2 dBW/MHz Pulse Width 3 useconds Pulse Recurring Frequency (PRF) 500 pulses per sec Antenna Gain (main beam) 30 dBi, 1,584 (side lobe) — 10 dB, 0.1 Antenna type Phase Scan Array Antenna Motion Mechanical Scan Azimuth Antenna Height 75 ft. AGL Interference Calculations: The interference was calculated into the earth station receive systems at C—Band and L—Band for both in—band and out—of—band interference. The interference power level was calculated using the formula below: P,=P, + G, — FSL — OHLOSS + Ges — LL4 — Lgg Where: P; : Interference power level received at victim earth station, in dBW or dBW/MHz Py Transmitter power of RADAR system, in dBW or dBW/MHz G;: Gain of RADAR transmit antenna, in dBi FSL: Free Space Loss between RADAR and earth station, in 4B

OHLOSS: Over—the—Horizon losses between radiolocation system and earth station, in dB G;,: Horizon gain of the earth station toward RADAR antenna, in dBi LL,; Line losses of the RADAR system, in dB (assume 2 dB per NTIA report) LLss: Line losses of the earth station system, in dB (assume 0 dB unless known) This interference power level was then compared to in—band and out—of—band interference criteria. The in—band criteria was developed using ITU and FCC recommendations‘. The out—of—band interference criteria was developed using the following: The earth station‘s low —noise amplifier front—end overload criteria of was determined using the following calculations: T=C—G Where: T = input threshold at which front—end overload occurs, dBW C = output 1 dB gain compression point of the LNB/LNA, typical —20 dBW G= Gain of the LNB/LNA, dB For the purposes of this report it was assumed that the low—noise amplifier would not provide any out—of—band frequency rejection, thus no Frequency Dependent Rejection values based upon any RF selectivity, such as pre—LNB/LNA filtering or inherent LNB/ LNA filtering, have been assumed. The maximum level of interference includes the input saturation threshold value minus a 10 dB output back—off value to consider in operation levels. The maximum interference power receive, P,, allowable then becomes: Max P, > T — IPBO For a 65 dB gain LNA this value is —95 dBW. In the absence of manufacturer LNA/LNB specifications the following typical values have been used: T =—95 dBW C=—20 dBW G=65 dB The propagation model to determine the over—the—horizon loss is the NSMA OH—Loss model®. When the propagation link is very lengthy, over 250 miles, an estimated OH— loss using a rounded earth modeling value has been used. The calculated FSL and OH is shown in Table 8 along with the ship and land base RADAR locations. The ship ! FCC Rules 47CFR25.251 by reference ITU Radio Regulations Appendix 87. * National Spectrum Managers Association has developed an industry accepted version which incorporates NBS Tech Note 101.

locations are in the Pearl Harbor, Pacific Missile Range and Hawaii operational areas. The land based sites are at Fort Shafter and the Honolulu Airport. Table 8 Location of Ship‘s and Land Based RADARS and FSL and OH Calculation FSL Site Name Latitude Longitude Bearing(deg) Distance({mi) (dB) OH (dB) Pearl Harbor South OPAREA PHS1 190800 1591500 206.6 169.2 153 58.1 PHS2 210000 1580800 186.9 23.3 135.8 0 PHS3 210000 1573600 126 39.2 140.3 57.2 PHS4 191800 1562000 140.5 180.6 153.6 60 PHSS5 184900 1574500 172.8 174.8 153.3 59.1 FORACS Hawaii Hawaii1 212530 1581100 315.8 8.6 1271 91.8 Hawaii2 212100 1581500 275.5 10.4 128.8 2.8 Hawaii3 211500 1580800 205.3 6.5 124.7 0 Hawaiid 211500 1580700 196.1 6.1 124.2 0 Pacific Missile Range Faciity (PMRF) PMRF1 220000 1594500 116.1 293.5 149.8 76 PMRF2 220800 1620000 257.3 283 156.8 62.2 PMRF3 224500 1614000 249.3 293.7 156.4 66.2 PMRF4 260000 1581500 321.2 358.2 158.7 111.6 Fort Shafter 211800 1574900 97.9 17.8 133.5 58.9 Honolulu Airport 211955 1575511 91.3 11.0 120.0 3.7 The results of the calculation of the RADAR A fundamental signal into the C—Band earth station are shown in Table 9. This calculation was performed to determine whether there was a potential for LNA/LNB saturation. Table 9 RADAR A Fundamental Frequency Interference Signal into Earth Station Site Name Main Beam Side Lobe Main Beam Side Lobe Signal Level (dBW) Signal level (dBW) Saturation Saturation Pearl Harbor South OPAREA PHS1 ~121.1 1731 no no PHS2 ~45.8 —97.8 yes no PHS3 ~107.5 ~159.5 no no PHS4 ~123.6 ~175.6 no no PHSS ~122.4 ~1744 no no FORACS Hawai Hawaii1 ~128.9 ~180.9 no no Hawalii2 ~41.6 —93.6 yes yes Hawail3 ~34.7 —86.7 yes yes Hawaild4 ~34.2 —86.2 yes yes Pacific Missile Range Facility (PMRF) PMRF1 ~135.8 ~187.8 no no PMRF2 ~129 ~181 no no

PMRF3 —132.6 ~184.6 no no PMRF4 —180.3 —232.3 no no The results of the calculation of the RADAR B fundamental signal into the C—Band earth station are shown in Table 10. This calculation was performed to determine whether there was a potential for LNA/LNB saturation. Table 10 RADAR B Fundamental Frequency Interference Signal into Earth Station Site Name Main Beam Side Lobe Main Beam Side Lobe Signal Level (dBW) Signal level (dBW) Saturation Saturation Pearl Harbor South OPAREA PHS1 —132.4 —1744 no no PHS2 —57.1 —99.1 yes no PHS3 ~118.8 —160.8 no no PHS4 ~134.9 —176.9 no no PHSS ~133.7 ~175.7 no no FORACS Hawaii Hawaii1 —140.2 ~182.2 no no Hawail2 —52.9 —95 yes no Hawaii3 46 —88 yes yes Hawaiid ~45.5 —87.5 yes yes Pacific Missile Range Facility (PMRF) PMRF1 ~147.1 ~189.1 no no PMRF2 —140.3 ~182.3 no no PMRF3 ~143.9 ~185.9 no no PMRF4 —191.6 —233.6 no no The results of the calculation of the RADAR C fundamental signal into the C—Band earth station are shown in Table 11. This calculation was performed to determine whether . there was a potential for LNA/LNB saturation. Table 11 RADAR C Fundamental Frequency Interference Signal into Earth Station s Site Name Main Beam Side Lobe Main Beam Side Lobe Signal Level (dBW) Signal level (dBW) Saturation Saturation Pearl Harbor South OPAREA PHS1 ~127.1 —173.1 no no PHS2 +51.8 —97.8 yes no PHS3 ~113.5 ~159.5 no no PHS4 —129.6 ~175.6 no no PHSS —128.4 ~1744 no no FORACS Hawai Hawail1 ~134.9 ~180.9 no no Hawaii2 ~47.6 —93.6 yes yes Hawail3 ~40.7 —86.7 yes yes Hawaild —40.2 —86.2 yes yes Pacific Missile Range Facility (PMRF) PMRF1 ~141.8 ~187.8 no no PMRF2 ~135 —181 no no PMRF3 —138.6 —184.6 no no PMRF4 ~186.3 —232.3 no no

The results of the calculation of the RADARs D, E and F fundamental signal into the C— Band earth station are shown in Table 12. This calculation was performed to determine whether there was a potential for LNA/LNB saturation. Table 12 RADAR D, E and F Fundamental Frequency Interference Signal into Earth Station Site Name Main Beam Side Lobe Main Beam Side Lobe Signal Level (dBW) Signal level (dBW) Saturation Saturation Pearl Harbor South OPAREA PHSA1 ~130.1 ~173.1 no no PHS2 —54.8 ~97.8 yes no PHS3 ~116.5 ~159.5 no no PHS4 ~132.6 —175.6 no no PHS5 1314 ~174.4 no no FORACS Hawaii Hawail1 ~137.9 —180.9 no no Hawaii2 —50.6 ~93.6 yes yes Hawaii3 ~43.7 —86.7 yes yes Hawaild ~43.2 —86.2 yes yes Pacific Missile Range Facilty (PMRF) PMRF1 ~144.8 ~187 .8 no no PMRF2 —138 181 no no PMRF3 ~141.6 —184.6 no no PMRF4 ~189.3 232.3 no no The results of the calculation of the Fort Shafter RADAR F fundamental signal into the C—Band earth station and the Honolulu Airport FAA RADAR fundamental into the INMARSAT earth station are shown in Table 13. This calculation was performed to > determine whether there was a potential for LNA/LNB saturation. Table 13 Land Based RADAR F Fundamental Frequency Interference Signal into Earth Station Site Name Main Beam Side Lobe Main Beam Side Lobe Signal Level (dBW) Signal level (dBW) Saturation Saturation Fort Shafter —108.4 ~154.4 no no C—Band Honolulu Airport ~48.7 —88.7 yes yes L—band To determine in the in—band interference to the C— and L—Band earth stations calculations were made with the RADAR emissions within the 3550 — 3700 MHz Band and the 3700 — 4200 MHz Band at C—Band and in the 1525 — 155 MHz Band at L—Band. The results of the calculation of the RADAR A emissions into the pass band of the C— Band earth station are shown in Table 14. This calculation was performed to determine whether there was a potential for interference from the RADAR A into the extended and normal band pass frequencies of the earth station.

Table 14 RADAR A Emission In—Band Interference Signal into Earth Station Site Name Main Beam Side Lobe Main Beam Side Lobe 3550—3700 MHz 3550—3700MHz 3700—4200MHz 3700—4200MHz Level Level Level Level (dBW/MHz) (dBW/MHz) (dBW/MHz) (dBW/MHz) Pearl Harbor South OPAREA PHS1 —237.1 —246.1 PHS2 : ~161.8 ~170.8 PHS3 ~171.5 —223.5 —180.5 ~232.5 PHS4 ~187.6 —239.6 —196.6 —248.6 PHSS5 ~186.4 —238.4 ~195.4 —247 4 FORACS Hawaii Hawail1 ~192.9 —244.9 —201.9 —253.9 Hawail2 ~157.6 ~166.6 Hawaiis ~159.7 Hawaild & —159.2 «Pacific Missile Range F PMRF1 ~199.8 —251.8 —208.8 —260.8 PMRF2 _ ~193 —245 —202 —254 PMRF3 —196.6 —248.6 —205.6 —257.6 PMRF4 —244.3 —296.3 —253.3 ~305.3 Yellow— exceeds interference criteria The results of the calculation of the RADAR B emissions into the pass band of the C— Band earth station are shown in Table 15. This calculation was performed to determine whether there was a potential forinterference from the RADAR B into the extended and normal band pass frequencies of the earth station. Table 15 RADAR B Emission In—Band Interference Signal into Earth Station Site Name Main Beam Side Lobe Main Beam Side Lobe 3550—3700 MHz 3550—3700MHz 3700—4200MHz 3700—4200MHz Level Level Level Level (dBW/MHz) (dBW/MHz) (dBW/MHz) (dBW/MHz) Pearl Harbor South OPAREA PHSA1 —167.4 —209.4 _ 12024 —244 4A PHS2 1 —169.1 PHS3 ~195.8 —188.8 —230.8 PHS4 ~169.9 —211.9 —204.9 —246.9 PHSS5 —168.7 ~210.7 —203.7 —245.7 FORACS Hawaii Hawail1 _ —175.2_________ 217.2 2102 252.2 Hawaii2 . 100. —164.9 Hawail3 ~158 Hawaild ~157.5 Pacific Missile Range Facility (PMRF)

PMRF1 ~182.1 —224.1 ~217.1 —259.1 PMRF2 ~175.3 217.3 —210.3 —252.3 PMRF3 ~178.9 —220.9 ~213.9 —255.9 PMRF4 ~226.6 ~268.6 —261.6 —303.6 Yellow— exceeds interference criteria The results of the calculation of the RADAR C emissions into the pass band of the C— Band earth station are shown in Table 16. This calculation was performed to determine whether there was a potential for interference from the RADAR C into the extended and normal band pass frequencies of the earth station. Table 16 RADAR C Emission In—Band Interference Signal into Earth Station Site Name Main Beam Side Lobe Main Beam Side Lobe 3550—3700 MHz 3550—3700MHz 3700—4200MHz 3700—4200MHz Level Level Level Level (dBW/MHz) (dBW/MHz) (dBW/MHz) (dBW/MHz) Pearl Harbor South OPAREA PHS1 ~240.1 —249.1 PHS2 ~164.8 ~173.8 PHS3 —180.5 —226.5 ~189.5 —235.5 PHS4 ~196.6 ~242.6 —205.6 —251.6 PHS5 —195.4 —241 4 —204.4 —250.4 FORACS Hawai Hawaii1 —247.9 —256.9 Hawaii2 ~160.6 —169.6 Hawail3 ~162.7 Hawaild ~162.2 Pacific Missile Range Facility (PMRF) PMRF1 —208.8 —254.8 —217.8 —263.8 PMRF2 —202 —248 —211 —257 PMRF3 —205.6 —251.6 —214.6 —260.6 PMRF4 —253.3 —299.3 —262.3 —308.3 Yellow— exceeds interference criteria The results of the calculation of RADAR D, E, and F emissions into the pass band of the C—Band earth station are shown in Table 17. This calculation was performed to determine whether there was a potential for interference from these RADARs into the extended and normal band pass frequencies of the earth station. Table 17 RADARs D, E an F Emissions In—Band Interference Signal into Earth Station Site Name Main Beam Side Lobe Main Beam Side Lobe 3550—3700 MHz 3550—3700MHz 3700—4200 MHz 3700—4200MHz Level (dBW/MHz) Level (dBW/MHz) Level (dBW/MHz) Level (dBW/MHz) Pearl Harbor South OPAREA PHS1 —197.1 —243.1 —206.1 ~252.1 PHS2 —167.8 ~176.8 PHS3 —183.5 —229.5 ~192.5 —238.5 PHS4 —199.6 —245.6 —208.6 ~254.6 i

PHSS ~198.4 —244 4 207 .4 —253.4 FORACS Hawaii Hawaiit —204.9 —250.9 —259.9 Hawaii2 . ~163.6 —172.6 Hawaii3 —156.7 —165.7 Hawaild — ~156.2 ~165.2 Pacific Missile Range Facility (PMRF) PMRF1 ~211.8 —257.8 —220.8 —266.8 PMRF2 —205 —251 —214 —260 PMRF3 —208.6 —254.6 —217.6 —263.6 PMRF4 —256.3 —302.3 265.3 —311.3 Yellow—exceeds interference criteria The results of the calculation of the Fort Shafter RADAR emission in band to the C—Band earth station are shown in Table 18. Also shown in table 18 is the Honotulu Airport FAA RADAR emission into the pass band of the INMARSAT earth station. Table 18 Land Based RADAR Emissions In—Band Interference Signal into Earth Station Site Name Main Beam Side Lobe Main Beam Side Lobe 3550—3700 MHz 3550—3700MHz 3700—4200MHz 3700—4200MHz Level (dBW/MHz) Level (dBW/MHz) Level (dBW/MHz) Level (dBW/MHz) Fort Shafter —178.4 ~224.4 ~187.4 —233.4 FAA Honolulu Airport RADAR—INMARSAT 1525 — 1559 MHz 1525 —1559 MHz _ Yellow— exceeds interference criteria Conclusions and Recommendations: The calculations indicate that there is potential interference from RADAR transmitters located on the island of Oahu and on ships at—sea to the operation of the planned 13—meter C—Band earth station and to the INMARSAT earth station terminal at the Hawait Pacific Teleport. This condition is true for any teleport thatis located on the coastal plains of Oahu because of the presence of military RADAR on ships operating at sea off the island. The interference can occur in two ways; from the fundamental frequency of the RADAR transmitters, which in every case is below the pass band frequency of the earth stations, and from the RADAR emissions that will exist in the pass band of the earth stations‘ receivers. The RADAR fundamental frequency can be filtered in front of the earth station‘s LNA/LNB this will prevent front end saturation and receiver overload. The typical filters for C—Band earth stations are built to operate from 3700 —4200 MHz. Since it is desired to extend the operation of C—Band earth station to the 3550 — 4200 MHz band, a custom built filter will have to be designed to pass this band and reject signals below the band by as much as 65 dB based on the calculated levels at the earth station receiver. A high pass filter to protect the INMARSAT earth station will also be necessary to reject emissions from L—Band RADAR. A filter that rejects signals by 50 dB in the INMARSAT band of operation will take care ofthis interference based on the calculations.

The calculations also predict that there will be in band interference signals from the RADARs that must be considered. The calculations show that most of the instances of in band interference occur when the RADAR main beam is directed at the earth station. As a point ofinterest, no in band interference condition was predicted by the calculations for a RADAR antenna side lobe to earth station antenna side lobe orientation in the 3700 — 4200 MHz frequency band. There are a few predictions of interference for this relative antenna condition for the 3550 — 3700 MHz frequency band. To deal with this interference in the extended band and the main beam interference from the various RADARs to all of the C—Band earth station and to the INMARSAT operation, shielding can be installed at the site to reduce the interference signal levels that are predicted by the calculations. The site shielding will have to be designed to block and attenuate the signals from the identified operational areas and land based RADAR sites. Comsearch reviewed the use of the extended C—Band in the United States in the FCC and their database. The review revealed that there were a few operators in the 3600 — 3700 MBHz frequency range. The review also revealed that there were no licensed operations in the 3550 — 3600 MHz frequency range. Comsearch recommends that a measurement site survey be conducted at the Hawaii Pacific Teleport so that the signal levels predicted in this report can be confirmed by measurement. The measurements will not only determine signal levels but will also confirm the direction that they are coming from. Knowing the measured levels and their point of origin will help in locating the optimum position of the C— and L—Band earth stations and the relative position of the shielding structure. The measurement report will not only provide the electromagnetic environmental data but will also include sketches of the shield design that can be used by HPT in getting proposals from building contractors for the purpose of installing the shield. Through the use of optimum site selection for the earth stations, filter design and site shielding the interference conditionsidentified in this report can be mitigated. Through the proper application of these mitigation techniques the earth stations can be installed and operated at the HPT in an interference—free manner.

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Document Created: 2011-04-04 12:24:43
Document Modified: 2011-04-04 12:24:43
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