Attachment EMC_Somis63

This document pretains to SES-MFS-20140114-00021 for Modification w/ Foreign Satellite (earth station) on a Satellite Earth Station filing.

IBFS_SESMFS2014011400021_1032607

Interference Analysis Report An Assessment of the Impact of Radiolocation Systems Operating in 3.1-3.7 GHz Band on Fixed Satellite Services Earth Station Receiver Prepared for SES Americom, Inc. TRANSMIT-RECEIVE EARTH STATION (6.3 METER) FCC CALL SIGN: E930289 Site Name: Somis, California Prepared By January 10, 2014 19700 Janelia Farm Blvd.• Ashburn, Virginia 20147 USA • 703.726.5500

1.0 Introduction Interference calculations were performed to determine the potential for in-band and out-of-band interference from Radiolocation Systems operating in the 3.1 to 3.7 GHz band1. The geographical positions and operating parameters of these systems was derived from NTIA Document TR-99-3612. 2.0 Radiolocation Systems in the 3.1 – 3.7 GHz Band High powered mobile and fixed radar systems operated by the Federal Government operate in the 3.1 – 3.7 GHz band. These radars are used to search for, and track, near-surface and high-altitude airborne projectiles, sea surveillance and airborne objects. The NTIA report referenced above has identified the locations for two types of systems: land-based and shipboard based. Also included in the report are the operating characteristics of these radars. There are two prevalent types of shipboard radars, denoted as type A and Type B, and one type of ground-based radar. An Airborne System radar is also specified. This analysis will concern itself with interference from the ground based and shipboard based radars based upon the relative operating positions and parameters specified in the NTIA report. A summary of the operating parameters for the shipboard and ground based radar systems is shown below: Table 1 – Technical Characteristics of 3.1-3.7 GHz Radiolocation Systems Characteristic Shipboard System A Shipboard System B Ground Based System Modulation P0N Q7N P0N Tuning Range (GHz) 3.5-3.7 3.1-3.5 3.1-3.4 Peak transmit Power 1 4 0.12 (MW) Pulse Width (µsec.) 1.0 3.5-51.2 10.75 Pulse Repetition Rate 1.125 0.152-6.0 2793.3-5050.51 (kHz) Duty Cycle (%) 0.001 0.8-2.0 0.041 Transmit 3-dB 4,16.6 4 1,10 Bandwidth (MHz) Antenna Type Reflector Phased Array Phase Scan Array Antenna Mainbeam 32 42 36 Gain (dBi) Antenna Centerline (m) 46 20 46 1 This report is being provided as required under Footnote US 245. 2 National Telecommunications and Information Administration, U.S. DEPARTMENT OF COMMERCE, NTIA Report TR 99-361, TECHNICAL CHARACTERISTICS OF RADIOLOCATION SYSTEMS OPERATING IN THE 3.1-3.7 GHz BAND AND PROCEDURES FOR ASSESSING EMC WITH FIXED EARTH STATION RECEIVERS, (December 1999). Interference Analysis Report for Somis, California

3.0 Earth Station System Parameters The Fixed Satellite Service Earth Station’s operational parameters are shown in the Tables 2 and 3 below: TABLE 2 - SATELLITE EARTH STATION PARAMETERS AND COORDINATION DATA Administrative Information Status ENGINEER PROPOSAL Call Sign E930289 Licensee Code P3210 Licensee Name SES Americom, Inc. Site Information SOMIS, CALIFORNIA Venue Name Latitude (NAD 83) 34° 19' 32.0" N Longitude (NAD 83) 118° 59' 41.4" W Climate Zone A Rain Zone 4 Ground Elevation (AMSL) 307.85 m / 1010.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Analog and Digital Satellite Arc 170° W to 186° West Longitude Azimuth Range 245.5° to 256.5° Corresponding Elevation Angles 23.3° / 10.3° Antenna Centerline (AGL) 4.27 m / 14.0 ft Antenna Information Receive Transmit Manufacturer GD Satcom GD Satcom Model 6.3 Meter 6.3 Meter Gain / Diameter 46.3 dBi / 6.3 m 50.2 dBi / 6.3 m 3-dB / 15-dB Beamwidth 0.84° / 1.58° 0.57° / 1.00° N0N 100KG7W to 10M0G7W Max Available RF Power (dBW/4 kHz) 0.5 -2.7 -2.7 (dBW/MHz) 24.5 21.3 21.3 Maximum EIRP (dBW/4 kHz) 50.7 47.5 47.5 (dBW/MHz) 74.7 71.5 71.5 (dBW) 50.7 61.5 81.5 Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -131.0 dBW/4 kHz 0.0025% Frequency Information Receive 4.0 GHz Transmit 6.1 GHz Emission / Frequency Range (MHz) N0N / 3625.0 - 3700.0 N0N / 5850.0 - 5925.0 100KG7W - 10M0G7W / 3625.0 - 3700.0 100KG7W - 10M0G7W / 5850.0 - 5925.0 N0N / 3700.0 - 4200.0 N0N / 5925.0 - 6424.0 100KG7W - 10M0G7W / 3700.0 - 4200.0 100KG7W - 10M0G7W / 5925.0 - 6425.0 Max Great Circle Coordination Distance 285.3 km / 177.2 mi 183.1 km / 113.7 mi Precipitation Scatter Contour Radius 388.2 km / 241.2 mi 123.4 km / 76.7 mi Interference Analysis Report for Somis, California

TABLE 3 - TABLE OF EARTH STATION COORDINATION VALUES (continued) Coordination Values SOMIS, CA Licensee Name SES Americom, Inc. Latitude (NAD 83) 34° 19' 32.0" N Longitude (NAD 83) 118° 59' 41.4" W Ground Elevation (AMSL) 307.85 m / 1010.0 ft Antenna Centerline (AGL) 4.27 m / 14.0 ft Antenna Model GD Satcom 6.3 Meter Antenna Mode Receive 4.0 GHz Transmit 6.1 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -131.0 dBW/4 kHz 0.0025% Max Available RF Power 0.5 (dBW/4 kHz) Receive 4.0 GHz Transmit 6.1 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 0 16.27 103.38 -10.00 100.00 -10.00 100.00 5 16.21 108.36 -10.00 100.00 -10.00 100.00 10 16.46 113.31 -10.00 100.00 -10.00 100.00 15 17.10 118.24 -10.00 100.00 -10.00 100.00 20 15.91 123.28 -10.00 100.00 -10.00 100.00 25 16.03 128.23 -10.00 100.00 -10.00 100.00 30 14.60 133.30 -10.00 100.00 -10.00 100.00 35 15.50 138.19 -10.00 100.00 -10.00 100.00 40 15.76 143.11 -10.00 100.00 -10.00 100.00 45 16.52 147.91 -10.00 100.00 -10.00 100.00 50 17.15 152.64 -10.00 100.00 -10.00 100.00 55 17.68 157.28 -10.00 100.00 -10.00 100.00 60 18.46 161.59 -10.00 100.00 -10.00 100.00 65 18.02 166.13 -10.00 100.00 -10.00 100.00 70 19.38 168.79 -10.00 100.00 -10.00 100.00 75 19.27 169.64 -10.00 100.00 -10.00 100.00 80 19.33 164.93 -10.00 100.00 -10.00 100.00 85 17.53 159.65 -10.00 100.00 -10.00 100.00 90 17.22 154.76 -10.00 100.00 -10.00 100.00 95 17.26 149.90 -10.00 100.00 -10.00 100.00 100 17.18 144.98 -10.00 100.00 -10.00 100.00 105 14.42 139.63 -10.00 100.00 -10.00 100.00 110 11.61 134.26 -10.00 100.00 -10.00 100.00 115 9.63 129.08 -10.00 100.00 -10.00 100.00 120 8.28 124.07 -10.00 101.35 -10.00 100.00 125 7.55 119.20 -10.00 108.52 -10.00 100.00 130 6.77 114.33 -10.00 116.80 -10.00 100.00 135 5.86 109.48 -10.00 126.60 -10.00 100.00 140 5.24 104.68 -10.00 132.55 -10.00 100.00 145 6.25 99.99 -10.00 122.48 -10.00 100.00 150 7.25 95.24 -10.00 111.72 -10.00 100.00 155 8.68 90.44 -10.00 100.00 -10.00 100.00 160 7.74 85.63 -10.00 106.45 -10.00 100.00 165 7.79 80.81 -10.00 106.01 -10.00 100.00 170 7.92 75.99 -10.00 104.65 -10.00 100.00 175 8.98 71.09 -10.00 100.00 -10.00 100.00 180 7.80 66.41 -10.00 105.92 -10.00 100.00 185 5.20 62.06 -10.00 132.88 -10.00 100.00 Interference Analysis Report for Somis, California

TABLE 3 - TABLE OF EARTH STATION COORDINATION VALUES (continued) Coordination Values SOMIS, CA Licensee Name SES Americom, Inc. Latitude (NAD 83) 34° 19' 32.0" N Longitude (NAD 83) 118° 59' 41.4" W Ground Elevation (AMSL) 307.85 m / 1010.0 ft Antenna Centerline (AGL) 4.27 m / 14.0 ft Antenna Model GD Satcom 6.3 Meter Antenna Mode Receive 4.0 GHz Transmit 6.1 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBW/4 kHz 20% Short Term -146.0 dBW/MHz 0.01% -131.0 dBW/4 kHz 0.0025% Max Available RF Power 0.5 (dBW/4 kHz) Receive 4.0 GHz Transmit 6.1 GHz Horizon Antenna Horizon Coordination Horizon Coordination Azimuth (°) Elevation (°) Discrimination (°) Gain (dBi) Distance (km) Gain (dBi) Distance (km) 190 2.97 57.89 -10.00 172.19 -10.00 100.00 195 0.00 54.23 -10.00 285.28 -10.00 183.06 200 1.56 49.35 -10.00 206.26 -10.00 112.79 205 2.30 44.75 -9.27 191.07 -9.27 100.00 210 2.27 40.52 -8.19 196.93 -8.19 102.43 215 3.04 36.05 -6.92 186.04 -6.92 100.00 220 3.35 31.94 -5.61 185.92 -5.61 100.00 225 2.64 28.77 -4.47 206.73 -4.47 108.52 230 0.89 26.31 -3.50 264.58 -3.50 154.82 235 2.33 21.68 -1.40 227.75 -1.40 125.79 240 3.62 17.06 1.20 213.14 1.20 112.03 245 5.00 12.33 4.73 209.67 4.73 105.06 250 4.62 8.63 8.60 241.99 8.60 125.18 255 5.59 4.92 14.70 275.39 14.70 139.60 260 6.43 5.16 14.18 255.06 14.18 128.08 265 6.18 9.39 7.68 213.68 7.68 104.84 270 7.10 13.82 3.49 179.26 3.49 100.00 275 8.89 18.51 0.32 138.31 0.32 100.00 280 10.03 23.46 -2.26 118.33 -2.26 100.00 285 10.79 28.46 -4.36 104.04 -4.36 100.00 290 11.84 33.49 -6.12 100.00 -6.12 100.00 295 11.71 38.48 -7.63 100.00 -7.63 100.00 300 12.51 43.51 -8.96 100.00 -8.96 100.00 305 11.99 48.48 -10.00 100.00 -10.00 100.00 310 11.74 53.47 -10.00 100.00 -10.00 100.00 315 12.43 58.49 -10.00 100.00 -10.00 100.00 320 13.76 63.51 -10.00 100.00 -10.00 100.00 325 14.82 68.53 -10.00 100.00 -10.00 100.00 330 14.84 73.51 -10.00 100.00 -10.00 100.00 335 14.10 78.49 -10.00 100.00 -10.00 100.00 340 14.67 83.48 -10.00 100.00 -10.00 100.00 345 16.07 88.47 -10.00 100.00 -10.00 100.00 350 17.12 93.44 -10.00 100.00 -10.00 100.00 355 16.11 98.42 -10.00 100.00 -10.00 100.00 Interference Analysis Report for Somis, California

4.0 Interference Calculations The interference was calculated into the earth station receive system for both in-band and out-of-band interference. The interference power level was calculated using the formula below: Pr = Pt + Gt – FSL – OHLOSS + Ges – LLt - LLes Where: Pr : Interference power level received at victim earth station, in dBW Pt: Transmitter power of Radiolocation system, in dBW Gt: Gain of Radiolocation transmit system, in dBi FSL: Free Space Loss between radiolocation system and earth station, in dB OHLOSS: Over-the-Horizon losses between radiolocation system and earth station, in dB Ges: Horizon gain of the earth station toward radiolocation transmitter, in dBi LLt: Line losses of the radiolocation system, in dB (assume 2dB per NTIA report) LLes: 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 recommendations3. 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 LNA, typical -20 dBW G = Gain of the 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-LNA filtering or inherent LNA filtering, have been assumed. The maximum level of interference includes the input saturation threshold value minus a 10 dB output backoff value to consider in operation levels The maximum interference power receive, Pr, allowable then becomes: Max Pr > 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 model4. When the propagation link is very lengthy, over 250 miles, an estimated OH-loss using a rounded earth modeling value has been used. 3 FCC Rules 47CFR25.251 by reference ITU Radio Regulations Appendix S7. 4 National Spectrum Managers Association has developed an industry accepted version which incorporates NBS Tech Note 101. Interference Analysis Report for Somis, California

5.0 Summary of Results The summary calculations are shown for all shipboard based and land based systems in Tables 4 through 8 below. Whenever Radar A and B are possibly in use, the interference calculations have assumed the higher powered systems (Radar B). The antenna elevation for the Ground Based systems was assumed to be 46 m even though it was not specified in the NTIA report. Interference Analysis Report for Somis, California

Table 4 Shipboard Radar A Land-Based Test and Training Sites Profile (Is path Total Interfering under Estimated Profiled Path Power Out-of Bearing Distance 250 OH-Loss OH-Loss Loss Level In-Band Band Radar Location Lat (N) Lon (w) (deg.) (mi) miles?) FSL (dB) (dB) (dB) (dB) (dBW/MHz) Interference? Overload? Pensacola, FL 302128 0871626 89.9 1875.6 NO -173.3 -97.0 N/A -270.3 -220.3 NO NO Pascagoula, MS 302200 0882900 90.5 1805.5 NO -173.0 -96.4 N/A -269.3 -219.3 NO NO St.Inigoes, MD 381000 0762300 71.1 2394.6 NO -175.4 -58.8 -58.8 -234.2 -184.2 NO NO Table 5 Shipboard Radar B Land-Based Test and Training Sites Profile (Is path Total Interfering under Estimated Profiled Path Power Out-of Bearing Distance 250 OH-Loss OH-Loss Loss Level In-Band Band Radar Location Lat (N) Lon (w) (deg.) (mi) miles?) FSL (dB) (dB) (dB) (dB) (dBW/MHz) Interference? Overload? Moorestown, NJ 395849 0745630 67.6 2462.8 NO -175.6 -101.8 -67.8 -277.4 -211.4 NO NO Wallops Island, VA 375600 0752800 71.3 2447.4 NO -175.6 -101.7 -66.7 -277.2 -211.2 NO NO Table 6 Shipboard Radars A and B Home Ports Profile (Is path Total Interfering under Estimated Profiled Path Power Out-of Bearing Distance 250 OH-Loss OH-Loss Loss Level In-Band Band Radar Location Lat (N) Lon (w) (deg.) (mi) miles?) FSL (dB) (dB) (dB) (dB) (dBW/MHz) Interference? Overload? Bath, ME 435425 0694848 60.4 2724.4 NO -176.5 -103.5 N/A -280.0 -214.0 NO NO Bremerton, WA 473324 1223811 349.4 932.7 NO -167.2 -84.9 N/A -252.1 -186.1 NO NO Everett, WA 475858 1221354 350.9 957.4 NO -167.4 -85.3 N/A -252.8 -186.8 NO NO Mayport, FL 302334 0812427 87.0 2215.0 NO -174.7 -99.9 N/A -274.6 -208.6 NO NO Norfolk, VA 365200 0762100 73.4 2407.7 NO -175.5 -101.4 -67.4 -276.8 -210.8 NO NO Pascagoula, MS 302253 0882933 90.5 1804.7 NO -172.9 -96.4 N/A -269.3 -203.3 NO NO Pearl Harbor, HI 212000 1580000 258.6 2549.8 NO -175.9 -102.4 N/A -278.3 -188.1 NO NO Portland, ME 434100 0701800 60.8 2699.3 NO -176.4 -103.4 N/A -279.8 -213.8 NO NO San Diego CA 324105 1170800 135.9 156.0 YES -151.7 -73.3 -73.3 -225.0 -159.0 NO NO Interference Analysis Report for Somis, California

Table 7 Naval At-Sea Operational Areas Profile (Is path Total Interfering under Estimated Profiled Path Power Out-of Bearing Distance 250 OH-Loss OH-Loss Loss Level In-Band Band Operational Area Lat (N) Lon (w) (deg.) (mi) miles?) FSL (dB) (dB) (dB) (dB) (dBW/MHz) Interference? Overload? AFWTF (North Range) AFWTF (NR)1 183000 0670000 97.1 3402.4 NO -178.5 -107.4 N/A -285.8 -219.8 NO NO AFWTF (NR)2 200000 0670000 95.3 3350.6 NO -178.3 -107.1 N/A -285.4 -219.4 NO NO AFWTF (NR)3 221000 0654800 91.9 3350.2 NO -178.3 -107.1 N/A -285.4 -219.4 NO NO AFWTF (NR)4 221000 0652000 91.7 3377.7 NO -178.4 -107.2 N/A -285.6 -219.6 NO NO AFWTF (NR)5 185000 0620000 94.1 3685.8 NO -179.1 -108.8 N/A -287.9 -221.9 NO NO AFWTF (NR)6 185000 0620000 94.1 3685.8 NO -179.1 -108.8 N/A -287.9 -221.9 NO NO AFWTF (NR)7 182500 0643000 95.9 3552.5 NO -178.8 -108.1 N/A -287.0 -220.9 NO NO AFWTF (NR)8 183000 0644500 95.9 3534.8 NO -178.8 -108.0 N/A -286.8 -220.8 NO NO AFWTF (NR)9 183000 0663800 96.9 3424.0 NO -178.5 -107.5 N/A -286.0 -220.0 NO NO AFWTF (South Range) AFWTF (SR)1 180500 0675500 98.1 3363.4 NO -178.4 -107.2 N/A -285.5 -219.5 NO NO AFWTF (SR)2 180500 0652700 96.8 3508.2 NO -178.7 -107.9 N/A -286.6 -220.6 NO NO AFWTF (SR)3 181500 0651000 96.4 3519.1 NO -178.7 -108.0 N/A -286.7 -220.7 NO NO AFWTF (SR)4 181500 0641000 95.9 3578.0 NO -178.9 -108.2 N/A -287.1 -221.1 NO NO AFWTF (SR)5 170000 0641000 97.3 3622.5 NO -179.0 -108.5 N/A -287.5 -221.4 NO NO AFWTF (SR)6 165800 0642800 97.6 3606.1 NO -179.0 -108.4 N/A -287.3 -221.3 NO NO AFWTF (SR)7 153300 0660600 100.1 3562.3 NO -178.9 -108.2 N/A -287.0 -221.0 NO NO AFWTF (SR)8 153900 0662300 100.2 3542.0 NO -178.8 -108.1 N/A -286.9 -220.9 NO NO AFWTF (SR)9 163000 0662300 99.2 3510.5 NO -178.7 -107.9 N/A -286.6 -220.6 NO NO AFWTF (SR)10 163000 0675500 100.1 3420.9 NO -178.5 -107.5 N/A -286.0 -220.0 NO NO Interference Analysis Report for Somis, California

Table 7 Naval At-Sea Operational Areas (continued) Profile (Is path Profiled Total Interfering under Estimated OH- Path Power Out-of Bearing Distance 250 FSL OH-Loss Loss Loss Level In-Band Band Operational Area Lat (N) Lon (w) (deg.) (mi) miles?) (dB) (dB) (dB) (dB) (dBW/MHz) Interference? Overload? AUTEC AUTEC1 252000 0780500 94.0 2533.9 NO -175.9 -102.3 N/A -278.2 -212.1 NO NO AUTEC2 252000 0774500 93.8 2553.3 NO -176.0 -102.4 N/A -278.3 -212.3 NO NO AUTEC3 232500 0762000 95.9 2693.1 NO -176.4 -103.3 N/A -279.7 -213.7 NO NO AUTEC4 232500 0771500 96.5 2639.8 NO -176.3 -103.0 N/A -279.2 -213.2 NO NO FORACS, Hawaii FORACS, Hawaii1 212530 1581100 258.8 2557.2 NO -176.0 -102.4 N/A -278.4 -188.2 NO NO FORACS, Hawaii2 212100 1581500 258.8 2563.6 NO -176.0 -102.5 N/A -278.5 -188.3 NO NO FORACS, Hawaii3 211500 1580800 258.5 2560.3 NO -176.0 -102.4 N/A -278.4 -188.2 NO NO FORACS, Hawaii4 211500 1580700 258.5 2559.4 NO -176.0 -102.4 N/A -278.4 -188.2 NO NO Gulf of Mexico OPAREA GoM1 293601 0800130 87.8 2312.1 NO -175.1 -100.7 N/A -275.8 -209.7 NO NO GoM2 292521 0864800 91.6 1922.9 NO -173.5 -97.5 N/A -271.0 -204.9 NO NO GoM3 284101 0864800 93.1 1939.8 NO -173.6 -97.6 N/A -271.2 -205.2 NO NO GoM4 285231 0874400 93.3 1881.3 NO -173.3 -97.1 N/A -270.4 -204.4 NO NO Pacific Missile Range Facility (PMRF) PMRF1 220000 1594500 260.8 2628.0 NO -176.2 -102.9 N/A -279.1 -188.9 NO NO PMRF2 220800 1620000 262.4 2754.0 NO -176.6 -103.7 N/A -280.3 -190.1 NO NO PMRF3 224500 1614000 263.1 2714.7 NO -176.5 -103.5 N/A -279.9 -189.7 NO NO PMRF4 260000 1581500 266.1 2418.7 NO -175.5 -101.4 N/A -276.9 -197.4 NO NO Pearl Harbor South OPAREA PHS1 190800 1591500 256.3 2699.5 NO -176.4 -103.4 N/A -279.8 -189.6 NO NO PHS2 210000 1580800 258.2 2569.0 NO -176.0 -102.5 N/A -278.5 -188.3 NO NO PHS3 210000 1573600 257.8 2538.5 NO -175.9 -102.3 N/A -278.2 -188.0 NO NO PHS4 191800 1562000 254.3 2528.0 NO -175.9 -102.2 N/A -278.1 -193.5 NO NO PHS5 184900 1574500 254.7 2626.1 NO -176.2 -102.9 N/A -279.1 -194.5 NO NO Interference Analysis Report for Somis, California

Table 7 Naval At-Sea Operational Areas (continued) Profile (Is path Total Interfering under Estimated Profiled Path Power Out-of Bearing Distance 250 OH-Loss OH-Loss Loss Level In-Band Band Operational Area Lat (N) Lon (w) (deg.) (mi) miles?) FSL (dB) (dB) (dB) (dB) (dBW/MHz) Interference? Overload? Southern California (SOCAL) SOCAL1 385200 1255200 311.4 494.0 NO -161.7 -73.9 N/A -235.5 -169.5 NO NO SOCAL2 390000 1240000 320.7 425.7 NO -160.4 -71.3 N/A -231.7 -165.6 NO NO SOCAL3 311500 1163000 144.9 256.9 NO -156.0 -62.5 -72.8 -218.5 -152.5 YES NO SOCAL4 300000 1203000 196.9 310.8 NO -157.7 -65.8 N/A -223.5 -157.5 NO NO Virginia Capes OPAREA VC1 384500 0750000 69.8 2467.0 NO -175.7 -101.8 -68 -277.5 -211.4 NO NO VC2 384500 0743000 69.7 2494.6 NO -175.8 -102.0 -71.7 -277.7 -211.7 NO NO VC3 374500 0724000 71.2 2605.1 NO -176.1 -85.4 -85.4 -261.5 -195.5 NO NO VC4 350600 0724000 75.6 2637.7 NO -176.2 -103.0 N/A -279.2 -213.2 NO NO VC5 320000 0771200 82.4 2427.9 NO -175.5 -101.5 N/A -277.0 -211.0 NO NO VC6 342400 0773000 78.2 2371.9 NO -175.3 -101.1 N/A -276.4 -210.4 NO NO VC7 354000 0752500 75.4 2473.8 NO -175.7 -79.6 -79.6 -255.3 -189.3 NO NO VC8 370000 0755000 73.1 2435.4 NO -175.6 -101.6 -70.8 -277.1 -211.1 NO NO Interference Analysis Report for Somis, California

Table 8 Land-Based Radar Test and Training Sites Profile (Is path Total Interfering under Estimated Profiled Path Power Out-of Bearing Distance 250 OH-Loss OH-Loss Loss Level In-Band Band Radar Location Lat (N) Lon (w) (deg.) (mi) miles?) FSL (dB) (dB) (dB) (dB) (dBW/MHz) Interference? Overload? Fort Lewis WA 470525 1223510 349.1 900.7 NO -166.9 -84.3 N/A -251.2 -185.2 NO NO Yakima Firing WA 464018 1202135 355.6 854.9 NO -166.5 -83.4 N/A -249.8 -183.8 NO NO Fort Carson CO 383810 1044750 65.2 844.6 NO -166.4 -83.2 N/A -249.5 -183.5 NO NO Fort Rliey KS 385813 0965139 68.8 1270.9 NO -169.9 -90.3 N/A -260.2 -194.1 NO NO Fort Shafter HI 211800 1574900 258.4 2540.5 NO -175.9 -102.3 N/A -278.2 -188.0 NO NO Hunter AAF GA 320100 0810800 83.8 2200.1 NO -174.7 -99.8 N/A -274.5 -208.4 NO NO Fort Gillem GA 333600 0841900 81.8 1992.2 NO -173.8 -98.1 N/A -271.9 -205.9 NO NO Fort Benning GA 322130 0845815 84.6 1972.8 NO -173.7 -97.9 N/A -271.6 -205.6 NO NO Fort Stewart GA 315145 0813655 84.3 2175.0 NO -174.6 -99.6 N/A -274.2 -208.1 NO NO Fort Rucker AL 311947 0854255 87.1 1947.3 NO -173.6 -97.7 N/A -271.3 -205.3 NO NO Yuma Proving AZ 330114 1141855 107.1 284.3 NO -156.9 -64.3 -72.8 -221.1 -155.1 YES NO Fort Hood TX 310830 0974550 94.3 1255.9 NO -169.8 -90.1 N/A -259.9 -193.8 NO NO Fort Knox KY 375350 0855655 72.7 1865.2 NO -173.2 -98.3 -98.3 -271.5 -205.5 NO NO Fort Bragg NC 350805 0790035 77.2 2276.3 NO -175.0 -81.3 -81.3 -256.3 -190.2 NO NO Fort Campbell KY 363950 0872820 75.7 1784.6 NO -172.8 -108.6 N/A -281.4 -215.4 NO NO Fort Polk LA 310343 0931226 91.5 1519.4 NO -171.5 -93.4 N/A -264.8 -198.8 NO NO Fort Leonard MO 374430 0920737 73.2 1523.0 NO -171.5 -93.4 N/A -264.9 -198.9 NO NO Fort Irwin CA 351536 1164102 63.2 146.4 YES -151.1 -114.4 -114.4 -265.5 -199.5 NO NO Fort Sill OK 344024 0982352 83.0 1175.7 NO -169.2 -88.9 N/A -258.1 -192.1 NO NO Fort Bliss TX 314850 1062533 99.9 749.6 NO -165.3 -81.1 N/A -246.4 -180.4 NO NO Fort Leavenworth KS 392115 0945500 68.2 1378.9 NO -170.6 -91.7 N/A -262.3 -196.3 NO NO Fort Drum NY 440115 0754844 60.3 2413.3 NO -175.5 -101.4 N/A -276.9 -210.9 NO NO Fort Gordon GA 332510 0820910 81.4 2119.0 NO -174.3 -99.1 N/A -273.5 -207.5 NO NO Fort McCoy WI 440636 0904127 57.1 1662.1 NO -172.2 -94.9 N/A -267.2 -201.1 NO NO Fort Dix NJ 400025 0743713 67.5 2480.2 NO -175.7 -101.9 -69.4 -277.6 -211.6 NO NO Parks Reserve CA 374254 1214218 327.8 278.7 NO -156.7 -74.1 -74.1 -230.8 -164.8 NO NO Aberdeen Proving MD 392825 0760655 68.6 2401.2 NO -175.4 -101.3 -62.2 -276.7 -210.7 NO NO Fort Huachuca AZ 313500 1102000 108.2 537.5 NO -162.4 -75.3 N/A -237.7 -171.7 NO NO Fort Monmouth NJ 401900 0740215 66.9 2510.3 NO -175.8 -102.1 -73.4 -277.9 -211.9 NO NO Picatinny Arsenal NJ 405600 0743400 65.8 2479.2 NO -175.7 -101.9 -74.5 -277.6 -211.6 NO NO Interference Analysis Report for Somis, California

Table 8 Land-Based Radar Test and Training Sites (continued) Profile (Is path Total Interfering under Estimated Profiled Path Power Out-of Bearing Distance 250 OH-Loss OH-Loss Loss Level In-Band Band Radar Location Lat (N) Lon (w) (deg.) (mi) miles?) FSL (dB) (dB) (dB) (dB) (dBW/MHz) Interference? Overload? Redstone Arsenal AL 343630 0863610 80.2 1849.4 NO -173.2 -96.8 N/A -269.9 -203.9 NO NO White Sands NM 322246 1062813 97.0 736.7 NO -165.2 -80.8 N/A -246.0 -179.9 NO NO Army Research MD 390000 0765800 69.6 2357.0 NO -175.3 -101.0 -60.5 -276.3 -210.2 NO NO Fort Hunter CA 355756 1211404 312.4 169.9 YES -152.4 -89.0 -89 -241.4 -175.4 NO NO Kelly Support PA 402357 0800925 67.1 2178.5 NO -174.6 -99.6 -60.8 -274.2 -208.2 NO NO Table Headings Radar Location : The site name of the radar system Lat (N) : Radar latitude Lon (w) : Radar Longitude Bearing (deg.) : Azimuth from earth station toward radar. Distance (mi) : Distance from earth station to radar Profile (Is path under 250 miles?) : If path is over 250 miles no OH-loss profile is generated FSL (dB) : Free Space Loss Estimated OH-Loss (dB) : Using a rounded-earth model an estimated OH-loss is calculated for long paths Profiled OH-Loss (dB) : Using the NSMA Tropo Loss actual OH-loss calculcations are performed for shorter paths Total Path Loss (dB) : Total of Free Space Loss plus Over-the-Horizon loss Interfering Power Level (dBW/MHz) : Level of RF interference at the earth station's LNA input In-Band Interference? : If the Radar is operating in-band is the max. permissible interference criteria being met? Out-of Band Overload? : If the Radar is operating in out-of-band spectrum is the LNA overload threshold being met? Interference Analysis Report for Somis, California

6.0 Conclusions Calculations were performed to assess the electromagnetic compatibility (EMC) between the radars listed below and adjacent-band FSS earth station receiver at Somis, California. Interference assessment for Earth Stations Operating at 3625 - 3700 MHz at Somis, California site identified 2 cases of In-band potential interference. The applicant is aware of this potential for interference and will work with the Government Users to mitigate the problem. Results Total Number of Paths Lat (N) Lon (W) Out-of-Band In-Band 2 sites Overload? Interference? SOCAL 3, 311500 1163000 No Yes Yuma Proving, AZ 330114 1141855 No Yes Interference Analysis Report for Somis, California


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