Attachment EMC Analysis

This document pretains to SES-MOD-20040315-00393 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2004031500393_370210

Intelsat inspiring connections April 5, 2004 Ms. Marlene Dortch Secretary Federa I C om municat ions C ommission 445 lzth Street, S.W. Washington, D.C. 20554 RE: lntelsat LLC Application of modification of radio station license: E010206 Nuevo, CA FCC File No. SES-MOD-20040315-00393 Dear Ms. Dortch: Attached please find an Electromagnetic Compatibility (EMC) Analysis performed for the above-referenced earth station. Would you please associate this EMC analysis with lntelsat LLC's pending above application for modification of radio station license, filed on March 14, 2004. lntelsat LLC also has reviewed NTlA TR-99-361 Report, Jechnical Characteristics of Radiolocation Systems Operating in the 3.1-3.7GHz Band and Procedures for assessing EMC with Fixed Earth Station Receivers. To the extent there is a potential for unacceptabte interference that may be caused to its receiving earth station, lntelsat agrees to accept such interference. Furthermore, it is aware that the use of an RF filter ahead of the low noise amplifier would limit potential out-of-band interference to the receiving earth station. Respectfully submitted, lntelsat LLC Robert A. Mansbach Its Attorney lntelsat Global Service Corporatton 3400 International Drive NW, Washington DC 20008-3006 USA www.intekat.com T + 1 202-944-6800 F +1 202-944-7529

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 Intelsat Site Name: Nuevo, CA (Call Sign: E010206) Prepared By C O M S E AR C H March 31.2004 19700 Janelia Farm Blvd .Ashburn, VA 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 band'. The geographical positions and operating parameters of these systems was derived from NTIA Document TR-99-361'. 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: Characteristic Shipboard System A Shipboard System B Ground Based System Modulation PON Q7N PON 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 (psec.) 1.o 3.5-5 1.2 10.75 Pulse Repetition Rate 1.125 0.152-6.0 2793.3-5050.51 (lw Duty Cycle (%) 0.001 0.8-2.0 0.041 Transmit 3-dB 4,16.6 4 1,lO Bandwidth (MHz) Antenna Type Reflector Phased Array Phase Scan Array Antenna Mainbeam 32 42 36 Gain (dBi) Antenna Centerline (m) 46 20 46 ' This report is being provided as required under Footnote US 245. National Telecommunications and Information Administration, U S . DEPARTMENT OF COMMERCE, NTIA Report TR 99-361, TECHNICAL CHARACTERISTICS OF RADIOLOCATIONSYSTEMS 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 Nuevo, CA EO 10206

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 Call Sign E010206 Licensee Code INTELS Licensee Name INTELSAT, LLC Site Information NUEVO, CALIFORNIA Venue Name Latitude (NAD 83) 33" 47' 46.1" N Longitude (NAD 83) 117" 5' 15.1" W Climate Zone A Rain Zone 4 Ground Elevation (AMSL) 548.64 m / 1800.0 ft Link Information Satellite Type Geostationary Mode TR - Transmit-Receive Modulation Analog and Digital Satellite Arc 45" W to 190" West Longitude Azimuth Range 100.2' to 260.3" Corresponding Elevation Angles 6.2" I 5.5" Antenna Centerline (AGL) 8.53 m / 28.0 ft Antenna Information Receive Transmit Manufacturer Harris Corporation Harris Corporation Model 13 Meter 13.0 Meter Gain I Diameter 53.5 dBi / 13.0 m 56.8 dBi I 13.0 m 3-dB I 15-dB Beamwidth 0.36" 10.68" 0.25' 10.46" 36MOF8F 43K8G7W - 72MOG7W Max Available RF Power (dBWl4 kHz) 0.0 -2.7 -15.5 (dBW1MHz) 24.0 7.7 8.5 Maximum EIRP (dBWl4 Idlz) 56.8 54.1 41.3 (dBW/MHz) 80.8 64.5 65.3 Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBWl4 ~ H Z 20% Short Term -146.0 dBWlMHz 0.01% -131.0 dBWl4 ~ H Z 0.0025% Frequency Information Receive 4.0 GHz Transmit 6.1 GHz Emission I Frequency Range (MHz) 36MOF3F 13625.0 - 4200.0 36MOF3F 15850.0 - 6425.0 43K8G7W - 72MOG7W 13625.0 - 4200.0 43K8G7W - 72MOG7W I 5850.0 - 6425.0 Max Great Circle Coordination Distance 71 1.4 km I 442.0 mi 448.0 km I 278.3 mi Precipitation Scatter Contour Radius 427.7 km 1265.7 mi 120.8 km 175.1 mi Interference Analysis Report for Nuevo, CA E010206

Table 3 - Coordination Values Coordination Values NUEVO, CA Licensee Name INTELSAT, LLC Latitude (NAD 83) 33" 47'46.1" N Longitude (NAD 83) 117" 5' 15.1" W Ground Elevation (AMSL) 548.64 m / 1800.0 ft Antenna Centerline (AGL) 8.53 m / 28.0 ft Antenna Model Harris Corporation 13 Meter Antenna Mode Receive 4.0 GHz Transmit 6.1 GHz Interference Objectives: Long Term -156.0 dBW/MHz 20% -154.0 dBWI4 !&z 20% Short Term -146.0 dBWiMHz 0.01% -131.0 dBW/4 !&z 0.0025% Max Available RF Power 0.0 (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 2.24 99.69 -10.00 189.01 -10.00 100.00 5 2.57 95.18 -10.00 181.36 -10.00 100.00 IO 3.36 90.19 -10.00 161.48 -10.00 100.00 15 3.61 85.20 -10.00 155.83 -10.00 100.00 20 3.48 80.2 1 -10.00 158.82 -10.00 100.00 25 3.35 75.21 - 10.00 161.69 -10.00 100.00 30 3.66 70.2 1 -10.00 154.78 -10.00 100.00 35 3.78 65.22 -10.00 152.30 -10.00 100.00 40 3.64 60.23 -10.00 155.20 -10.00 100.00 45 3.65 55.23 -10.00 155.08 -10.00 100.00 50 3.30 50.25 -10.00 162.77 -10.00 100.00 55 3.14 45.27 -9.40 171.18 -9.40 100.00 60 3.06 40.29 -8.13 179.56 -8.13 100.00 65 3.70 35.27 -6.68 172.64 -6.68 100.00 70 3.75 30.28 -5.03 180.37 -5.03 100.00 75 3.48 25.33 -3.09 196.17 -3.09 100.00 80 4.03 20.30 -0.69 197.39 -0.69 100.00 85 3.93 15.35 2.34 213.14 2.34 108.91 90 3.77 10.47 6.50 244.01 6.50 127.34 95 2.98 6.09 12.39 3 14.05 12.39 170.03 100 3.30 2.86 20.58 657.76 20.58 408.53 105 3.45 5.50 13.50 309.12 13.50 163.25 110 4.2 1 9.07 8.06 245.82 8.06 126.59 115 4.35 12.97 4.18 216.86 4.18 109.83 120 4.28 16.92 1.29 203.99 1.29 100.00 125 4.45 20.63 -0.86 189.74 -0.86 100.00 130 4.20 24.51 -2.73 183.80 -2.73 100.00 135 4.84 27.66 -4.04 163.95 -4.04 100.00 140 4.13 31.54 -5.47 170.13 -5.47 100.00 145 4.52 34.45 -6.43 156.63 -6.43 100.00 150 4.01 37.77 -7.43 160.20 -7.43 100.00 155 3.03 41.16 -8.36 179.06 -8.36 100.00 160 3.47 43.06 -8.85 164.64 -8.85 100.00 165 4.02 44.38 -9.18 151.47 -9.18 100.00 170 4.30 45.39 -9.42 145.83 -9.42 100.00 175 4.78 45.68 -9.49 138.55 -9.49 100.00 180 5.28 45.43 -9.43 134.38 -9.43 100.00 185 6.02 44.45 -9.20 128.17 -9.20 100.00 Interference Analysis Report for Nuevo, CA E010206

Coordination Values NUEVO, CA Licensee Name INTELSAT, LLC Latitude (NAD 83) 33" 47' 46.1" N Longitude (NAD 83) 117" 5' 15.1" W Ground Elevation (AMSL) 548.64 m / 1800.0 ft Antenna Centerline (AGL) 8.53 m / 28.0 ft Antenna Model Hams Corporation 13 Meter Antenna Mode Receive 4.0 GHz Transmit 6.1 GHz Interference Objectives: Long Term -156.0 dBWNHz 20% -154.0 dBW/4 ~ H Z 20% Short Term -146.0 dBW/MHz 0.01% -131.0 dBW/4 ~ H Z 0.0025% Max Available RF Power 0.0 (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 6.49 43.29 -8.9 1 124.21 -8.91 100.00 195 6.64 41.96 -8.57 123.91 -8.57 100.00 200 6.92 40.06 -8.07 122.86 -8.07 100.00 205 6.64 38.22 -7.56 127.96 -7.56 100.00 210 6.17 36.09 -6.94 134.35 -6.94 100.00 215 5.70 33.59 -6.16 142.71 -6.16 100.00 220 6.30 30.02 -4.93 141.49 -4.93 100.00 225 5.97 26.89 -3.74 151.35 -3.74 100.00 230 5.98 23.34 -2.20 159.30 -2.20 100.00 235 5.67 19.85 -0.45 174.86 -0.45 100.00 240 5.66 16.06 1.85 188.34 1.85 100.00 245 5.79 12.09 4.94 204.46 4.94 100.00 250 5.24 8.46 8.82 233.36 8.82 116.68 255 4.63 4.81 14.95 291.97 14.95 148.35 260 4.39 1.13 30.72 711.38 30.72 448.00 265 4.39 4.83 14.90 296.86 14.90 151.92 270 4.6 1 9.74 7.28 232.67 7.28 118.19 275 4.79 14.72 2.80 204.41 2.80 100.00 280 3.82 19.77 -0.40 202.99 -0.40 100.32 285 2.82 24.84 -2.88 208.40 -2.88 109.14 290 1.34 29.97 -4.92 236.88 -4.92 133.84 295 1.13 34.94 -6.58 234.41 -6.58 133.51 300 0.77 39.94 -8.03 244.21 -8.03 141.41 305 0.40 44.93 -9.31 265.15 -9.31 160.83 310 0.22 49.9 1 -10.00 282.84 - 10.00 179.07 315 0.00 54.89 - 10.00 285.28 - 10.00 181.13 320 0.00 59.86 -10.00 285.28 -10.00 181.13 325 0.00 64.83 -10.00 285.28 -10.00 181.13 330 0.00 69.80 -10.00 285.28 -10.00 181.13 335 0.00 74.78 -10.00 285.28 -10.00 181.13 340 0.00 79.75 -10.00 285.28 -10.00 181.13 345 0.00 84.73 -10.00 285.28 -10.00 181.13 350 0.53 89.71 -10.00 247.88 -10.00 146.94 355 1.48 94.69 -10.00 206.20 -10.00 113.43 Interference Analysis Report for Nuevo, CA EO 10206

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 + G, - FSL - OHLOSS + G,, - LLt - LL,, Where: Pr : Interference power level received at victim earth station, in dBW P,: Transmitter power of Radiolocation system, in dBW GI: 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 G,: Horizon gain of the earth station toward radiolocation transmitter, in dBi LL,: Line losses of the radiolocation system, in dB (assume 2dB per NTIA report) LL,,: 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 is the includes the input saturation threshold value minus a 10 dB output backoff value to consider in operation levels The maximum interference power receive, P,, allowable then becomes: Max P, 2 T - IPBO For a 65 dB gain LNA this value is -95 dBW. In the absence of manufacturer LNALNB 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 47CFR25.25 1 by reference ITU Radio Regulations Appendix S7. National Spectrum Managers Association has developed an industry-accepted version that incorporates NBS Tech Note 101. Interference Analysis Report for Nuevo, CA E010206

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 Nuevo, CA E010206

Total Path Interfering out-of Loss Power Level In-Band Band (dB) (dBW/MHz) Interference? Overload? -267.1 -200.6 NO NO -266.1 - 199.6 NO NO -274.0 -219.1 NO NO Profile (Is Total path Estimated Profiled Path Interfering out-of Bearing Distance under 250 OH-Loss OH-Loss Loss Power 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 67.0 2373.1 NO -175.3 -99.5 N/A -274.8 -203.9 NO NO Wallops Island, VA 375600 0752800 70.8 2353.2 NO -175.3 -99.4 N/A -274.6 -203.6 NO NO Interfering out-of -209.8 -186.1 I NO -186.7 I NO I NO -189.2 I NO I NO -203.2 I NO I NO -1 83.5 Pearl Harbor, HI )212000 11580000 I 260.6 I 2653.2 I NO I -176.3 I -101.5 I N/A 1-277.; -171.0 Portland, ME 1434100 10701800 I 60.3 I 2618.1 I NO I -176.2 I -101.2 I N/A 1-277.~ -209.5 lSan Diego CA (324105 11170800 1 182.0 1 76.6 I YES I -145.5 I -75.5 I -75.5 1-221.( -154.4 YES 19700 Janelia Farm Blvd .Ashburn, VA 20147 USA 703.726.5500

Operational Area AFWTF (North Range) Lat (N) Lon (w) Profile (Is path under Distance1 250 (mi) miles?) 1 1 FSL (dB) Estimated Profiled OH-Loss OH-LOSS (dB) (dB) In-Band out-of Band Interference? Overload? AFWTF (NR)l 183000 0670000 97.7 3285.4 NO -178.2 -105.2 N/A -283.3 -186.7 NO NO AFWTF (NR)2 200000 0670000 95.7 3234.5 NO -178.0 -104.9 NIA -282.9 -186.3 NO NO AFWTF (NR)3 221000 0654800 92.3 3235.9 NO -178.0 -104.9 NIA -282.9 -200.4 NO NO AFWTF (NR)4 1221000 10652000 I 92.1 1 3263.5 I NO I -178.1 I -105.1 I NIA -283.11 -200.6 1 NO I NO AFWTF (NR)5 1185000 10620000 I 94.6 I 3569.7 I NO I -178.9 I -106.6 1 NIA -285.51 -203.0 I NO I NO AFWTF (NR)6 185000 0620000 94.6 3569.7 NO -178.9 -106.6 N/A -285.51 -203.0 I NO I NO AFWTF (NR)7 182500 0643000 96.4 3435.8 NO -178.5 -105.9 N/A -284.51 -187.9 I NO 1 NO -284.3 -187.7 NO NO -283.5 -186.9 NO NO -283.01 -186.4 I NO I NO -284.11 -187.5 I NO I NO -284.41 -187.8 I NO I NO -284.2 -187.6 NO NO -283.5 -186.9 NO NO Interference Analysis Report for Nuevo, CA EO 10206

Table 7 Naval At-Sea Operational Areas (continued) Profile (Is path under Estimated Profiled Total I out-of OH-LOSS Band Operational Area Lat(N) Lon(w) (mi) miles?) (dB) (dB) (dB) Overload? AUTEC AUTEC 1 252000 0780500 94.3 N/A NO AUTEC2 252000 0774500 94.1 N/A NO AUTEC3 232500 0762000 96.3 2577.9 N/A NO AUTEC4 96.9 2524.4 N/A NO FORACS, Hawaii1 260.9 2660.8 1 NO I -176.3 1 -101.5 N/A -277.81 -171.1 I NO NO 260.8 2667.1 I NO I -176.3 1 -101.5 N/A -277.91 -171.1 I NO NO FORACS, Hawaii3 2 1I500 1580800 260.6 2663.7 NO -176.3 -101.5 N/A NO FORACS, Hawaii4 211500 1580700 260.5 2662.7 NO -176.3 -101.5 N/A NO Gulf of Mexico OPAREA GoM 1 293601 0800130 87.8 2202.3 NO -174.7 -98.2 N/A -272.91 -190.4 I NO NO GoM2 292521 0864800 91.6 1811.1 NO -173.0 -94.8 N/A -267.81 -185.3 I NO NO GoM3 284101 0864800 93.3 1827.2 NO -173.1 -95.0 N/A -268.01 -185.5 I NO NO GoM4 28523 1 0874400 93.4 1768.7 NO -172.8 -94.4 N/A -267.21 -184.7 I NO NO Pacific Missile Range Facility (PMRF) PMRFl 220000 1594500 262.7 2733.5 NO -176.6 -102.0 N/A -278.51 -171.8 I NO NO PMRF2 220800 1620000 264.2 2861.0 NO -176.9 -102.8 N/A -279.71 -173.0 I NO NO PMRF3 224500 1614000 264.9 2822.2 NO -176.8 -102.5 N/A -279.4 -172.6 NO PMRF4 260000 1581500 268.0 2528.1 NO -175.9 -100.6 N/A -276.5 -193.2 NO Pearl Harbor South OPAREA I 1 PHS 1 190800 1591500 258.3 2800.8 I NO I -176.8 I -102.4 N/A -279.21 -172.4 I NO NO PHS2 210000 1580800 260.2 N/A -277.9 -171.2 NO PHS3 210000 1573600 259.8 N/A -277.6 -170.9 NO PHS4 191800 1562000 256.4 2627.0 N/A -277.5 -170.7 NO IPHS5 1184900 11574500 256.8 2725.7 N/A -278.5 -171.7 NO NO Interference Analysis Report for Nuevo, CA EO 10206

Operational Area Southern California (SOCAL) Lat O’J) hued -3- Lon(w) I (deg.) Profile (Is path under Bearing Distance1 250 (mi) miles?) 11 FSL (dB) Estimated Profiled O%$ss OH-LOSS (dB) In-Band out-of Band Interference? Overload? 1 iV 1 1 fl: SOCALl 385200 1255200 I 308.1 601.8 1 NO I -163.4 I -75.7 N/A ,239.11 -173.1 NO NO SOCAL2 390000 526.5 I NO I -162.2 1 -73.4 NIA NO NO SOCAL3 311500 178.8 I YES 1 -152.9 I -75.8 -75.8 NO NO SOCAL4 300000 1203000 218.4 329.6 4 ;:: : NIA YES NO Virginia Capes OPAREA vc 1 384500 2374.5 N/A NO NO vc2 384500 2402.2 -175.4 -99.7 NIA NO NO I I 1 1 1 1 vc3 374500 2510.7 NO -175.8 -100.5 N/A NO NO vc4 350600 3724000 2538.2 I NO I -175.9 I -100.7 N/A NO NO vc5 320000 377 1200 2322.2 -175.1 -99.1 NIA NO NO VC6 342400 3773000 2270.3 -174.9 -98.7 NIA NO NO vc7 354000 3752500 2375.0 NO -175.3 -99.5 NIA NO NO IVC8 1370000 3755000 72.6 2339.2 I NO I -175.2 I -99.3 NIA NO NO Interference Analysis Report for Nuevo, CA EO 10206

Table 8 Land-Based Radar Test and Training Sites Profile (Is path Total under Estimated Profiled out-of Bearing Distance 250 FSL OH-LOSS OH-LOSS In-Band Band Radar Location Lat(N) Lon(w) (deg.1 (mi) miles?) (dB) (dB) (dB) Interference? Overload? Fort Lewis WA 470525 1223510 344.2 962.0 NO -167.5 -83.8 NIA NO NO Yakima Firing WA 464018 1202135 350.0 905.0 NO -167.0 -82.8 NIA NO NO. Fort Carson CO 383810 1044750 60.5 763.5 NO -165.5 -79.8 NIA -245.3 -177.4 NO NO Fort Rilev KS 385813 0965139 66.4 1182.8 NO -169.3 -87.4 NIA -256.7 -185.7 NO NO Fort Shafter 260.4 -101.4 NIA -277.7 -170.9 NO NO 83.6 -97.3 NIA -271.6 -196.2 NO NO 81.3 1887.9 -95.5 NIA -268.9 -193.6 NO NO 84.3 1866.0 NO -173.2 -95.3 NIA -268.6 -193.2 NO NO 84.1 2068.1 NO -174.1 -97.1 N/A -271.3 -195.9 NO NO Fort Rucker AL 1311947 10854255 86.9 -95.1 NIA -268.2 -185.7 NO NO Yuma Proving AZ 1330114 11141855 107.7 -73.5 -73.5 -225.9 -141.8 YES NO Fort Hood 94.0 -86.8 NIA -255.8 -173.3 NO NO 71.7 1770.7 -172.8 -94.4 NIA -267.2 -196.2 NO NO 76.8 2175.9 -174.6 -98.0 N/A -272.6 -197.2 NO NO 74.7 1686.8 -172.4 -93.6 NIA -265.9 -195.0 NO NO € 91.3 1408.3 -170.8 -90.5 NIA -261.2 -178.7 NO NO Fort Leonard MO 1374430 10920737 71.7 -90.7 NIA -261.6 -190.6 NO NO Fort Irwin CA (351536 11164102 12.7 -69.5 -69.5 -217.6 -151.6 YES NO Fort Sill OK 344024 0982352 81.5 1071.7 -168.4 -85.7 NIA -254.1 -178.8 NO NO Fort Bliss TX 314850 1062533 99.5 635.3 -163.9 -76.6 NIA -240.5 -158.9 NO NO Fort Leavenworth KS 392115 0945500 66.1 1291.3 - 170.0 -88.9 NIA -259.0 -188.0 NO NO Fort Drum 59.4 -99.2 NIA -274.4 -206.5 NO NO 81.1 -96.7 N/A -270.6 -195.2 NO NO 55.1 1589.9 -171.8 -92.6 NIA -264.4 -196.5 NO NO 66.9 2390.6 -175.4 -99.6 NIA NO NO 317.5 374.6 -159.3 -67.4 NIA NO NO Aberdeen Proving MD 1392825 10760655 68.0 -99.1 NIA NO NO Fort Huachuca AZ 1313500 11102000 109.4 -69.5 NIA NO NO Interference Analysis Report for Nuevo, CA EO 10206

Total Estimated Profiled Path Interfering Out-of OH-LOSS OH-LOSS Loss Power Level In-Band Band (dB) (dB) 0 (dBW/MHz) Interference? Overload? -99.9 N/A -275.4 -204.4 NO NO -99.7 NIA -275.c - -204.1 NO NO -94.2 N/A -266.5 - -191.5 NO NO -76.3 N/A -240.c - -158.4 NO NO -98.7 NIA -273.f - -202.6 NO NO -62.3 NIA -219.1 -166.1 NO NO -97.3 N/A -271.: - -200.5 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 calculations are performed for shorter paths Total Path Loss (dB) : Total of Free Space Loss plus Over-the- Horizon loss Interfering Power Level : Level of RF interference at the earth (dBW/MHz) 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 Nuevo, CA EO 10206

6.0 Conclusions Calculations were performed to assess the electromagnetic compatibility (EMC) between the radars listed above and an adjacent-band FSS earth station receiver in Nuevo, CA. The interference assessment for 3625 - 3700 MHz at this site identified 4 cases of potential interference. However, due to their relatively low interference margin and the presence of above terrain obstacles Intelsat does not feel that these case will present any problems to the operation of this earth station. Total Number of Paths Lat (N) Lon (W) Out-of-Band In-Band 4 sites Overload? Interference? San Diego CA 324105 1170800 No Yes SOCAL4 300000 1203000 No Yes Yuma Proving AZ 330114 1141855 No Yes Fort Irwin CA 351536 1164102 No Yes Interference Analysis Report for Nuevo, CA E010206


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