Attachment EMC

This document pretains to SES-MOD-20030402-00453 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2003040200453_329149

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 TRANSMIT-RECEIVE EARTH STATION Site Name: Clarksburg, MD Earth Station Call Signs: KA261, KA262, KA263, and KA264 Prepared By July 25, 2003 • Ashburn, VA 20147 USA • 703.726.5500 19700 Janelia Farm Blvd.•

1.0 Introduction The Intelsat Clarksburg facility includes a number of large diameter earth stations that will operate in the extended C- band receive spectrum. This analysis considers the worst case operating parameters for any of the extended C-band stations, specifically earth station will call signs KA261, KA262, KA263, and KA264. 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-99-361 2 . Due to proximity of the Intelsat earth stations to each other and the use of the worst case antenna height and interference criterion this analysis has been provided as a comprehensive interference analysis for all earth stations operating in the extended C-band at this site. 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 (ìsec.) 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 Clarksburg, MD

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 Company INTELSAT CLARKSBURG TELEPORT Owner code P2540I Earth Station Name, State CLARKSBURG, MD Call Sign KA261 Latitude (DMS) (NAD83) 39 13 2.6 N Longitude (DMS) (NAD83) 77 16 10.9 W Ground Elevation AMSL (Ft/m) 462.03 / 140.82 Antenna Centerline AGL (Ft/m) 29.00 / 8.84 Receive Antenna Type: V41521 VERTEX COMMUNICATI 15.2 KPC 4.0 GHz Gain (dBi) / Diameter (m) 55.0 / 15.2 3 dB / 15 dB Half Beamwidth 0.17 / 0.35 Transmit Antenna Type: V61521 VERTEX COMMUNICATI 15.2 KPC 6.0 GHz Gain (dBi) / Diameter (m) 58.4 / 15.2 3 dB / 15 dB Half Beamwidth 0.11 / 0.22 Operating Mode TRANSMIT AND RECEIVE Modulation ANALOG Emission / Receive Band (MHz) 36M0F8W / 3700.0000 - 4200.0000 Emission / Transmit Band (MHz) 36M0F8W / 5925.0000 - 6425.0000 Max. Available RF Power (dBW)/4 kHz) -14.20 (dBW)/MHz) 9.80 Max. EIRP (dBW)/4 kHz) 44.20 (dBW)/MHz) 68.20 (dBW) 0.00 Max permissible Interference Power 4.0 GHz, 20% (dBW/1 MHz) -164.0 4.0 GHz, 0.0100% (dBW/1 MHz) -144.0 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 18.5 W / 65.0 W Azimuth Range (Min/Max) 111.0 / 161.0 Corresponding Elevation Angles 15.3 / 42.8 Radio Climate A Rain Zone 2 Max Great Circle Coordination Distance (Mi/Km) 4.0 GHz 194.9 / 313.7 6.0 GHz 88.7 / 142.8 Precipitation Scatter Contour Radius (Mi/Km) 4.0 GHz 320.2 / 515.4 6.0 GHz 62.1 / 100.0 Interference Analysis Report for Clarksburg, MD

Table of Earth Station Coordination Values Earth Station Name CLARKSBURG MD Owner INTELSAT CLARKSBURG TELEPORT Latitude (DMS) (NAD83) 39 13 2.6 N Longitude (DMS) (NAD83) 77 16 10.9 W Ground Elevation (Ft/m) 462.03 / 140.82 AMSL Antenna Centerline (Ft/m) 29.00 / 8.84 AGL Antenna Model VERTEX COMMUNICATI 15.2 KPC Objectives: Receive -164.0 (dBW /1 MHz) Transmit -154.0 (dBW /4 kHz) TX Power -14.2 (dBW/4 kHz) Azimuth Horizon Antenna 4.0 GHz 6.0 GHz (Deg) Elevation Disc. Antenna Coordination Antenna Coordination Angle Angle Gain Distance Gain Distance (Deg) (Deg) (dBi) (Km) (dBi) (Km) 0 0.80 110.28 -10.00 220.9 -9.60 100.0 5 1.00 105.47 -10.00 210.5 -9.60 100.0 10 0.70 100.62 -10.00 226.5 -9.60 100.1 15 0.90 95.79 -10.00 215.6 -9.60 100.0 20 0.90 90.95 -10.00 215.6 -9.60 100.0 25 0.80 86.11 -10.00 220.9 -9.60 100.0 30 0.80 81.27 -10.00 220.9 -9.60 100.0 35 0.90 76.43 -10.00 215.6 -9.60 100.0 40 0.80 71.61 -10.00 220.9 -9.60 100.0 45 0.80 66.79 -10.00 220.9 -9.60 100.0 50 0.70 62.00 -10.00 226.5 -9.60 100.1 55 0.80 57.20 -10.00 220.9 -9.60 100.0 60 0.70 52.46 -10.00 226.5 -9.60 100.1 65 0.70 47.74 -9.55 228.9 -9.15 101.3 70 0.80 43.04 -8.61 228.1 -8.21 100.0 75 0.70 38.45 -7.69 238.9 -7.29 106.2 80 0.70 33.93 -6.57 245.3 -6.17 109.1 85 0.70 29.55 -4.82 255.9 -4.42 113.9 90 0.60 25.42 -3.17 273.1 -2.77 123.2 95 0.60 21.58 -1.63 283.4 -1.23 127.6 100 0.70 18.19 0.45 291.0 0.85 129.1 105 0.80 15.66 2.48 299.0 2.88 130.6 110 0.70 14.63 3.37 313.6 3.40 135.5 115 0.70 15.13 2.90 309.3 3.30 135.2 120 0.70 17.11 1.31 297.3 1.71 131.7 125 0.70 20.13 -1.05 280.5 -0.65 124.7 130 0.60 23.63 -2.45 277.8 -2.05 125.2 135 0.40 27.07 -3.83 287.6 -3.43 133.9 140 0.40 30.20 -5.08 279.3 -4.68 130.4 145 0.20 33.29 -6.32 296.2 -5.92 142.7 150 0.30 35.90 -7.18 277.9 -6.78 132.7 155 0.70 37.97 -7.59 239.4 -7.19 106.4 160 0.10 40.55 -8.11 284.5 -7.71 137.3 165 0.10 42.23 -8.45 282.4 -8.05 136.4 170 0.20 43.38 -8.68 281.0 -8.28 135.7 175 0.00 44.70 -8.94 279.3 -8.54 135.0 180 0.00 46.22 -9.24 277.4 -8.84 134.1 Interference Analysis Report for Clarksburg, MD

Table of Earth Station Coordination Values Earth Station Name CLARKSBURG MD Owner INTELSAT CLARKSBURG TELEPORT Latitude (DMS) (NAD83) 39 13 2.6 N Longitude (DMS) (NAD83) 77 16 10.9 W Ground Elevation (Ft/m) 462.03 / 140.82 AMSL Antenna Centerline (Ft/m) 29.00 / 8.84 AGL Antenna Model VERTEX COMMUNICATI 15.2 KPC Objectives: Receive -164.0 (dBW /1 MHz) Transmit -154.0 (dBW /4 kHz) TX Power -14.2 (dBW/4 kHz) Azimuth Horizon Antenna 4.0 GHz 6.0 GHz (Deg) Elevation Disc. Antenna Coordination Antenna Coordination Angle Angle Gain Distance Gain Distance (Deg) (Deg) (dBi) (Km) (dBi) (Km) 185 0.00 48.12 -9.62 275.1 -9.22 133.1 190 0.00 50.34 -10.00 272.8 -9.60 133.3 195 0.00 52.83 -10.00 272.8 -9.60 133.3 200 0.00 55.57 -10.00 272.8 -9.60 133.3 205 0.00 58.52 -10.00 272.8 -9.60 133.3 210 0.20 61.53 -10.00 272.8 -9.60 133.3 215 0.20 64.79 -10.00 272.8 -9.60 133.3 220 0.20 68.17 -10.00 272.8 -9.60 133.3 225 0.50 71.55 -10.00 238.4 -9.60 109.2 230 0.50 75.12 -10.00 238.4 -9.60 109.2 235 0.50 78.74 -10.00 238.4 -9.60 109.2 240 0.90 82.35 -10.00 215.6 -9.60 100.0 245 1.00 86.06 -10.00 210.5 -9.60 100.0 250 0.60 89.79 -10.00 232.3 -9.60 104.6 255 0.60 93.50 -10.00 232.3 -9.60 104.6 260 0.80 97.22 -10.00 220.9 -9.60 100.0 265 0.70 100.88 -10.00 226.5 -9.60 100.1 270 1.30 104.66 -10.00 204.5 -9.60 100.0 275 1.20 108.25 -10.00 204.8 -9.60 100.0 280 1.50 111.90 -10.00 198.9 -9.60 100.0 285 1.50 115.38 -10.00 198.9 -9.60 100.0 290 1.50 118.74 -10.00 198.9 -9.60 100.0 295 2.00 122.24 -10.00 184.9 -9.60 100.0 300 2.00 125.34 -10.00 184.9 -9.60 100.0 305 2.50 128.57 -10.00 173.0 -9.60 100.0 310 1.90 130.82 -10.00 187.7 -9.60 100.0 315 1.60 132.95 -10.00 196.1 -9.60 100.0 320 1.30 134.72 -10.00 204.5 -9.60 100.0 325 1.30 136.35 -10.00 204.5 -9.60 100.0 330 1.20 137.47 -10.00 204.8 -9.60 100.0 335 1.00 134.17 -10.00 210.5 -9.60 100.0 340 1.10 129.47 -10.00 207.6 -9.60 100.0 345 1.20 124.73 -10.00 204.8 -9.60 100.0 350 1.10 119.93 -10.00 207.6 -9.60 100.0 355 1.00 115.12 -10.00 210.5 -9.60 100.0 Interference Analysis Report for Clarksburg, MD

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 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, 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 Clarksburg, MD

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 above ground level even though it was not specified in the NTIA report. Interference Analysis Report for Clarksburg, MD

Table 4 Shipboard Radar A Land-Based Test and Training Sites Radar Lat (N) Lon (w) Bearing Distance Profile (Is FSL (dB) Estimated Profiled Total Path Interfering In-Band Out-of Location (deg.) (mi) path OH-Loss OH-Loss Loss (dB) Power Level Interference? Band under 250 (dB) (dB) (dBW/MHz) Overload? miles?) Pensacola, FL 302128 0871626 225.8 834.7 NO -166.2 -81.3 N/A -247.5 -194.6 NO NO Pascagoula, MS 302200 0882900 229.5 882.5 NO -166.7 -82.2 N/A -249.0 -196.0 NO NO St.Inigoes, MD 381000 0762300 146.3 86.9 YES -146.6 -56.0 -56 -202.6 -151.7 YES NO Table 5 Shipboard Radar B Land-Based Test and Training Sites Radar Lat (N) Lon (w) Bearing Distance Profile (Is FSL (dB) Estimated Profiled Total Path Interfering In-Band Out-of Location (deg.) (mi) path OH-Loss OH-Loss Loss (dB) Power Level Interference? Band under 250 (dB) (dB) (dBW/MHz) Overload? miles?) Moorestown, NJ 395849 0745630 66.3 134.9 YES -150.4 -62.5 -62.5 -212.9 -151.0 YES NO Wallops VA 375600 0752800 131.7 131.8 YES -150.2 -60.0 -60 -210.2 -147.7 YES NO Island, Table 6 Shipboard Radars A and B Home Ports Radar Lat (N) Lon (w) Bearing Distance Profile (Is FSL (dB) Estimated Profiled Total Path Interfering In-Band Out-of Location (deg.) (mi) path OH-Loss OH-Loss Loss (dB) Power Level Interference? Band under 250 (dB) (dB) (dBW/MHz) Overload? miles?) Bath, ME 435425 0694848 47.6 504.1 NO -161.9 -72.5 N/A -234.4 -172.5 NO NO Bremerton, WA 473324 1223811 299.7 2355.6 NO -175.3 -99.3 N/A -274.6 -212.5 NO NO Everett, WA 475858 1221354 300.5 2335.6 NO -175.2 -99.1 N/A -274.3 -212.3 NO NO Mayport, FL 302334 0812427 202.3 652.2 NO -164.1 -77.0 N/A -241.1 -179.2 NO NO Norfolk, VA 365200 0762100 162.5 169.7 YES -152.4 -62.7 -62.7 -215.1 -152.9 YES NO Pascagoula, MS 302253 0882933 229.5 882.2 NO -166.7 -82.2 N/A -249.0 -180.0 NO NO Pearl Harbor, HI 212000 1580000 276.0 4981.5 NO -181.8 -112.3 N/A -294.1 -226.4 NO NO Portland, ME 434100 0701800 47.3 475.3 NO -161.4 -71.5 N/A -232.8 -170.9 NO NO San Diego CA 324105 1170800 270.3 2279.7 NO -175.0 -98.7 N/A -273.7 -204.0 NO NO Interference Analysis Report for Clarksburg, MD

Table 7 Naval At-Sea Operational Areas Operational Lat (N) Lon (w) Bearing Distance Profile (Is FSL (dB) Estimated Profiled Total Path Interfering In-Band Out-of Area (deg.) (mi) path OH-Loss OH-Loss Loss (dB) Power Level Interference? Band under 250 (dB) (dB) (dBW/MHz) Overload? miles?) AFWTF (North Range) AFWTF (NR)1 183000 0670000 153.9 1556.7 NO -171.7 -92.1 N/A -263.8 -196.8 NO NO AFWTF (NR)2 200000 0670000 152.4 1460.8 NO -171.1 -91.0 N/A -262.1 -195.2 NO NO AFWTF (NR)3 221000 0654800 146.9 1358.6 NO -170.5 -89.7 N/A -260.2 -193.3 NO NO AFWTF (NR)4 221000 0652000 145.8 1372.8 NO -170.6 -89.9 N/A -260.5 -193.6 NO NO AFWTF (NR)5 185000 0620000 142.9 1680.8 NO -172.3 -93.4 N/A -265.8 -198.8 NO NO AFWTF (NR)6 185000 0620000 142.9 1680.8 NO -172.3 -93.4 N/A -265.8 -198.8 NO NO AFWTF (NR)7 182500 0643000 148.5 1628.4 NO -172.1 -92.9 N/A -264.9 -198.0 NO NO AFWTF (NR)8 183000 0644500 149.0 1616.1 NO -172.0 -92.7 N/A -264.7 -197.8 NO NO AFWTF (NR)9 183000 0663800 153.1 1565.7 NO -171.7 -92.2 N/A -263.9 -197.0 NO NO AFWTF (South Range) AFWTF (SR)1 180500 0675500 156.4 1562.4 NO -171.7 -92.2 N/A -263.9 -201.6 NO NO AFWTF (SR)2 180500 0652700 150.9 1622.9 NO -172.0 -92.8 N/A -264.8 -197.9 NO NO AFWTF (SR)3 181500 0651000 150.1 1620.1 NO -172.0 -92.8 N/A -264.8 -197.9 NO NO AFWTF (SR)4 181500 0641000 148.0 1648.5 NO -172.2 -93.1 N/A -265.3 -198.3 NO NO AFWTF (SR)5 170000 0641000 149.3 1726.4 NO -172.6 -93.9 N/A -266.5 -199.5 NO NO AFWTF (SR)6 165800 0642800 150.0 1720.1 NO -172.5 -93.8 N/A -266.4 -199.4 NO NO AFWTF (SR)7 153300 0660600 154.6 1768.2 NO -172.8 -94.3 N/A -267.1 -200.2 NO NO AFWTF (SR)8 153900 0662300 155.1 1755.1 NO -172.7 -94.2 N/A -266.9 -204.7 NO NO AFWTF (SR)9 163000 0662300 154.4 1700.2 NO -172.4 -93.6 N/A -266.1 -199.1 NO NO AFWTF (SR)10 163000 0675500 157.7 1665.7 NO -172.3 -93.3 N/A -265.5 -203.3 NO NO Interference Analysis Report for Clarksburg, MD

Table 7 Naval At-Sea Operational Areas (continued) Operational Lat (N) Lon (w) Bearing Distance Profile (Is FSL (dB) Estimated Profiled Total Path Interfering In-Band Out-of Area (deg.) (mi) path OH-Loss OH-Loss Loss (dB) Power Level Interference? Band under 250 (dB) (dB) (dBW/MHz) Overload? miles?) AUTEC AUTEC1 252000 0780500 183.1 957.8 NO -167.4 -83.7 N/A -251.1 -189.2 NO NO AUTEC2 252000 0774500 181.8 957.1 NO -167.4 -83.6 N/A -251.1 -189.2 NO NO AUTEC3 232500 0762000 176.8 1090.0 NO -168.6 -85.9 N/A -254.5 -192.6 NO NO AUTEC4 232500 0771500 179.9 1088.5 NO -168.6 -85.9 N/A -254.4 -192.5 NO NO FORACS, Hawaii FORACS, Hawaii1 212530 1581100 276.2 4988.4 NO -181.8 -112.3 N/A -294.1 -226.4 NO NO FORACS, Hawaii2 212100 1581500 276.2 4995.3 NO -181.8 -112.4 N/A -294.1 -226.4 NO NO FORACS, Hawaii3 211500 1580800 276.0 4992.6 NO -181.8 -112.3 N/A -294.1 -226.4 NO NO FORACS, Hawaii4 211500 1580700 276.0 4991.6 NO -181.8 -112.3 N/A -294.1 -226.4 NO NO Gulf of Mexico OPAREA GoM1 293601 0800130 194.1 681.3 NO -164.5 -77.7 N/A -242.2 -180.3 NO NO GoM2 292521 0864800 221.6 867.7 NO -166.6 -81.9 N/A -248.5 -181.3 NO NO GoM3 284101 0864800 219.7 909.3 NO -167.0 -82.8 N/A -249.7 -182.5 NO NO GoM4 285231 0874400 223.0 931.9 NO -167.2 -83.2 N/A -250.4 -183.1 NO NO Pacific Missile Range Facility (PMRF) PMRF1 220000 1594500 277.4 5055.7 NO -181.9 -112.6 N/A -294.5 -226.8 NO NO PMRF2 220800 1620000 278.5 5180.7 NO -182.1 -113.0 N/A -295.1 -227.4 NO NO PMRF3 224500 1614000 279.0 5136.2 NO -182.0 -112.8 N/A -294.9 -227.2 NO NO PMRF4 260000 1581500 280.9 4810.2 NO -181.5 -111.7 N/A -293.2 -225.5 NO NO Pearl Harbor South OPAREA PHS1 190800 1591500 274.4 5144.7 NO -182.0 -112.9 N/A -294.9 -225.2 NO NO PHS2 210000 1580800 275.8 5002.8 NO -181.8 -112.4 N/A -294.2 -226.5 NO NO PHS3 210000 1573600 275.5 4971.9 NO -181.7 -112.3 N/A -294.0 -226.3 NO NO PHS4 191800 1562000 273.3 4968.2 NO -181.7 -112.3 N/A -294.0 -224.3 NO NO PHS5 184900 1574500 273.4 5070.6 NO -181.9 -112.6 N/A -294.5 -224.9 NO NO Interference Analysis Report for Clarksburg, MD

Table 7 Naval At-Sea Operational Areas (continued) Operational Lat (N) Lon (w) Bearing Distance Profile (Is FSL (dB) Estimated Profiled Total Path Interfering In-Band Out-of Area (deg.) (mi) path OH-Loss OH-Loss Loss (dB) Power Level Interference? Band under 250 (dB) (dB) (dBW/MHz) Overload? miles?) Southern California (SOCAL) SOCAL1 385200 1255200 284.8 2614.5 NO -176.2 -101.1 N/A -277.3 -209.6 NO NO SOCAL2 390000 1240000 284.4 2511.6 NO -175.8 -100.4 N/A -276.2 -208.5 NO NO SOCAL3 311500 1163000 267.4 2286.0 NO -175.0 -98.8 N/A -273.8 -204.1 NO NO SOCAL4 300000 1203000 267.8 2544.5 NO -175.9 -100.6 N/A -276.6 -206.9 NO NO Virginia Capes OPAREA VC1 384500 0750000 104.1 126.4 YES -149.9 -60.7 -60.7 -210.6 -148.6 YES NO VC2 384500 0743000 101.3 152.6 YES -151.5 -63.4 -63.4 -214.9 -153.0 YES NO VC3 374500 0724000 110.6 269.3 NO -156.4 -61.6 N/A -218.0 -156.1 YES NO VC4 350600 0724000 136.8 381.0 NO -159.4 -67.6 N/A -227.1 -160.2 YES NO VC5 320000 0771200 179.5 497.6 NO -161.8 -72.3 N/A -234.0 -172.1 NO NO VC6 342400 0773000 182.3 332.4 NO -158.3 -65.3 N/A -223.5 -161.6 YES NO VC7 354000 0752500 156.8 265.2 NO -156.3 -61.4 N/A -217.6 -155.4 YES NO VC8 370000 0755000 152.5 171.8 YES -152.5 -61.2 -61.2 -213.7 -146.8 YES NO Interference Analysis Report for Clarksburg, MD

Table 8 Land-Based Radar Test and Training Sites Radar Lat (N) Lon (w) Bearing Distance Profile (Is FSL (dB) Estimated Profiled Total Path Interfering In-Band Out-of Location (deg.) (mi) path OH-Loss OH-Loss Loss (dB) Power Level Interference? Band under 250 (dB) (dB) (dBW/MHz) Overload? miles?) Fort Lewis WA 470525 1223510 298.8 2354.0 NO -175.3 -99.3 N/A -274.5 -212.5 NO NO Yakima Firing WA 464018 1202135 297.9 2245.0 NO -174.8 -98.5 N/A -273.3 -211.2 NO NO Fort Carson CO 383810 1044750 277.1 1483.8 NO -171.2 -91.3 N/A -262.5 -194.8 NO NO Fort Riley KS 385813 0965139 275.2 1053.3 NO -168.3 -85.3 N/A -253.6 -185.9 NO NO Fort Shafter HI 211800 1574900 275.9 4972.2 NO -181.7 -112.3 N/A -294.0 -226.3 NO NO Hunter AAF GA 320100 0810800 204.8 542.0 NO -162.5 -73.8 N/A -236.3 -174.3 NO NO Fort Gillem GA 333600 0841900 227.5 551.6 NO -162.7 -74.1 N/A -236.7 -167.8 NO NO Fort Benning GA 322130 0845815 224.7 640.9 NO -164.0 -76.7 N/A -240.6 -173.4 NO NO Fort Stewart GA 315145 0813655 207.0 563.1 NO -162.8 -74.4 N/A -237.3 -172.6 NO NO Fort Rucker AL 311947 0854255 223.7 723.6 NO -165.0 -78.8 N/A -243.8 -176.5 NO NO Yuma Proving AZ 330114 1141855 269.3 2116.0 NO -174.3 -97.4 N/A -271.8 -202.1 NO NO Fort Hood TX 310830 0974550 250.3 1286.7 NO -170.0 -88.8 N/A -258.8 -188.1 NO NO Fort Knox KY 375350 0855655 261.7 478.8 NO -161.4 -71.6 N/A -233.0 -162.5 YES NO Fort Bragg NC 350805 0790035 199.4 297.5 NO -157.3 -63.3 N/A -220.6 -158.7 YES NO Fort Campbell KY 363950 0872820 255.6 584.4 NO -163.2 -75.1 N/A -238.2 -167.7 NO NO Fort Polk LA 310343 0931226 242.7 1063.3 NO -168.4 -85.5 N/A -253.8 -183.5 NO NO Fort Leonard MO 374430 0920737 267.4 812.0 NO -166.0 -80.8 N/A -246.8 -177.1 NO NO Fort Irwin CA 351536 1164102 274.8 2190.3 NO -174.6 -98.0 N/A -272.7 -203.0 NO NO Fort Sill OK 344024 0982352 261.4 1210.7 NO -169.5 -87.7 N/A -257.2 -186.7 NO NO Fort Bliss TX 314850 1062533 261.2 1720.9 NO -172.5 -93.8 N/A -266.4 -195.9 NO NO Fort KS 392115 0945500 276.2 946.1 NO -167.3 -83.4 N/A -250.8 -183.1 NO NO Leavenworth Fort Drum NY 440115 0754844 12.3 340.0 NO -158.4 -65.7 N/A -224.1 -161.3 YES NO Fort Gordon GA 332510 0820910 215.7 483.8 NO -161.5 -71.8 N/A -233.3 -166.1 NO NO Fort McCoy WI 440636 0904127 300.4 772.3 NO -165.6 -79.9 N/A -245.5 -183.4 NO NO Fort Dix NJ 400025 0743713 68.1 151.5 YES -151.4 -66.1 -66.1 -217.5 -155.6 YES NO Parks Reserve CA 374254 1214218 281.4 2412.0 NO -175.5 -99.7 N/A -275.2 -207.5 NO NO Aberdeen MD 392825 0760655 73.7 64.3 YES -144.0 -58.8 -58.8 -202.8 -140.9 YES NO Proving Interference Analysis Report for Clarksburg, MD

Table 8 Land-Based Radar Test and Training Sites (continued) Radar Lat (N) Lon (w) Bearing Distance Profile (Is FSL (dB) Estimated Profiled Total Path Interfering In-Band Out-of Location (deg.) (mi) path OH-Loss OH-Loss Loss (dB) Power Level Interference? Band under 250 (dB) (dB) (dBW/MHz) Overload? miles?) Fort Huachuca AZ 313500 1102000 263.8 1939.1 NO -173.6 -95.9 N/A -269.5 -199.0 NO NO Fort NJ 401900 0740215 65.2 188.1 YES -153.3 -69.3 -69.3 -222.6 -160.7 YES NO Monmouth Picatinny NJ 405600 0743400 49.6 185.9 YES -153.2 -184.3 -184.3 -337.5 -275.6 NO NO Arsenal Redstone Arsenal 343630 0863610 241.2 606.7 NO -163.5 -75.7 N/A -239.2 -168.9 NO NO AL White Sands NM 322246 1062813 262.5 1706.6 NO -172.5 -93.7 N/A -266.2 -195.7 NO NO Army MD 390000 0765800 132.5 22.1 YES -134.7 -73.8 -73.8 -208.5 -146.0 YES NO Research Fort Hunter CA 355756 1211404 278.1 2423.1 NO -175.5 -99.8 N/A -275.3 -207.6 NO NO Kelly Support PA 402357 0800925 298.9 173.9 YES -152.6 -150.7 -150.7 -303.3 -241.3 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 (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 Clarksburg, MD

6.0 Conclusions Calculations were perform to assess the electromagnetic compatibility (EMC) between the radars listed below and adjacent-band FSS earth station receivers at Clarksburg, MD. This interference assessment for an earth station operating at 3625 - 3700 MHz identified seventeen cases of In-band potential interference, see Table 9 below. No cases of potential LNB overload exist. The applicant is aware of this potential for interference but feels in most instances the site has sufficient close-in shielding to protect the site. Intelsat will work with the Government Users to mitigate any problems as necessary. Table 9 - Summary of Results Site Name Lat (n) Lon(w) Interfering In-Band LNB Level Interference Overload (dBW/MHz) St.Inigoes, MD 381000 0762300 -149.8 YES NO Moorestown, NJ 395849 0745630 -145.5 YES NO Wallops Island, VA 375600 0752800 -136.6 YES NO Norfolk, VA 365200 0762100 -147.2 YES NO VC1 384500 0750000 -134.1 YES NO VC2 384500 0743000 -138.4 YES NO VC3 374500 0724000 -138.7 YES NO VC4 350600 0724000 -156.1 YES NO VC6 342400 0773000 -156.7 YES NO VC7 354000 0752500 -149.7 YES NO VC8 370000 0755000 -144.9 YES NO Fort Bragg NC 350805 0790035 -154.6 YES NO Fort Drum NY 440115 0754844 -158.1 YES NO Fort Dix NJ 400025 0743713 -150.1 YES NO Aberdeen Proving MD 392825 0760655 -135.4 YES NO Fort Monmouth NJ 401900 0740215 -155.2 YES NO Army Research MD 390000 0765800 -135.0 YES NO Interference Analysis Report for Clarksburg, MD


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Document Modified: 2003-08-12 11:55:28
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