Attachment Amendment

Amendment

AMENDMENT submitted by Stratos offshore

Amendment

2003-09-17

This document pretains to SES-MOD-20030506-00598 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2003050600598_343558

September 17, 2003 Reference: File No SES—MOD 20030506—00598 Call Sign: E980235 Ms. Sylvia T. Lam Engineer, System Analysis Branch Satellite Division International Bureau Federal Communications Commission Washington, D.C. 20554 SUBJECT: Application of Stratos Offshore Service Company to change assigned frequency and add Eutelsat Atlantic Bird 2 satellite located at 8 degrees W.L. Dear Ms. Lam: In response to your conversation yesterday with my staff member Sue Gibbs, please find attached the additional information submitted as an amendment to the original application, requested in your letter of July 25. Upon receipt of this letter with attachments you should have all information necessary to complete the subject application. I wish to thank you for your patience in working with us during this process and look forward to working with you again on future projects. Should you have any questions, please feel free to contact me at 504—323—2602. Sincerely Shere / U). Stobel Sheryl W. Scobel Regulatory Manager Attachments: 1. Radiation Hazard Study 2. 24—Hour Point of Contact 3. Signed Certification 4. Comsearch Analysis and Calculations Report 701 Poydras Street, Suite 1550 + New Orleans, Louisiana 70139 Tel: (800) 600.9610 + Fax: (504) 323—2768 + website: www.stratosglobal.com

Attachment 1 Radiation Hazard Assessment Of A 6.1 m Ku Band Antenna System In accordance with FCC OET Bulletin #65 as annotated and amended.

Radiation Hazard Assessment of a Ku-Band 6.1 M Parabolic Antenna System Page 1 General This document is based on information contained in the Federal Communications Commission Office of Engineering Technology Bulletin 65. I certify that I have read and am familiar with that document. Background This report is based on the generic calculation for a circular parabolic antenna. These calculations contemplate uniform illumination of the reflector with 100 watts of power at the feed point of the antenna. Summary Of The Results The analysis shows that there is potential hazard to the general public under certain circumstances as shown below: The analysis shows that the power density levels will exceed the FCC MPE limit during periods of maximum output, near the reflector surface, between feed and reflector. This antenna will be mounted inside a 2 meter tall chain link fence. This location is inaccessible to the general population. The analysis shows that there is potential hazard to the occupational user under certain circumstances. The analysis shows that the power density levels will exceed the FCC MPE limit during periods of maximum output between feed and reflector. The area between the feed and the reflector has field intensity greater that the limit for any population. The earth station transmitter will be turned off whenever maintenance and repair personnel are required to work within this potentially hazardous area. Description Of Terms 1. Near Field Region: The near field (or Fresnel) region is essentially a cylindrical region with its axis co-inclined with the antenna boresight. The diameter of this cylinder is equal to that of the antenna. According to the OET Bulletin No. 65, its length is equal to

Radiation Hazard Assessment of a Ku-Band 6.1 M Parabolic Antenna System Page 2 2. Far Field Region: The far field (or Fraunhofer region) extends outward from a distance equal to 0.6 times the square of the reflector diameter divided by the wavelength, according to OET Bulletin No. 65. Power density varies inversely as the square of the distance. 3 Transition Region: The transition region between the near field and the far field regions will have a power density that essentially decreases inversely as the distance. In any case, the maximum power density is calculated using the equation given in the Bulletin 4 Region Near The Reflector Surface: The power density in the region near the reflector surface can be estimated as equal to four times the power divided by the area of the reflector surface, assuming illumination is uniform and that it would be possible to intercept equal amounts of energy in both directions. 5. Region Between Reflector And Ground: The power density in the region between the reflector and ground can be estimated as equal to the power divided by the area of the reflector surface, assuming uniform illumination over the reflector. 6. Region Between The Feed Mouth and the Reflector: The radiation from the feed is essentially confined to a conical region whose vertex is located at the feed mouth and extends to the reflector. Power density is maximum at the feed mouth, and can be estimated as four times the power divided by the area. Data The calculations are given in the next pages.

General Population Nomenclature Formula Value Unit Input Paramters D=antenna Diameter 6.1 Meters d=diameter of feed mouth 0.152 Meters P=max Power input to antenna 100 Watts n=aperature efficiency 70.00% Percent f = Frequency 14 GHz 2 FCC MPE Limit 10.00 W/m 2 1.00 mW/cm Calculated Values k = wavelength @ 14 GHz .3 / f 0.0214 Meters A = Area of reflector (pi * (D /2)2 29.225 Meters 2 I = Length of near field (D/2) 2 /k 434 Meters L = beginning of far field .6 * D^2 /k 1042 Meters G=Antenna gain n pi(D/k) 2 559,816 times Decibel Gain 10 log(10) P1/P2 57.48 dBi 2 a=area of feed mouth pi*(d/2)^2 0.02 Meters Power Density Calculations Maximum Power Density in Region Region Hazard Assessment 2 Formula Value (W/m ) (based on FCC limit) 1 Near Field 4nP/A 9.58 < FCC MPE Limit 2 Far Field GP/(4(pi)L 2) 4.10 < FCC MPE Limit 3 Transition greater of near or far 9.58 < FCC MPE Limit 4 Near Reflector Surface 4 P/A 13.69 Potential Hazard 5 Between Reflector and Ground P/A 3.42 < FCC MPE Limit 6 Between Feed and Reflectors 4 P/a 22,044.27 Potential Hazard

Occupational exposure Nomenclature Formula Value Unit Input Paramters D=antenna Diameter 6.1 Meters d=diameter of feed mouth 0.152 Meters P=max Power input to antenna 100 Watts n=aperature efficiency 70.00% Percent f = Frequency 14 GHz 2 FCC MPE Limit 50.00 W/m 2 5.00 mW/cm Calculated Values k = wavelength @ 14 GHz .3 / f 0.0214 Meters A = Area of reflector (pi * (D /2)2 29.225 Meters 2 I = Length of near field (D/2) 2 /k 434 Meters L = beginning of far field .6 * D^2 /k 1042 Meters G=Antenna gain n pi(D/k) 2 559,816 times Decibel Gain 10 log(10) P1/P2 57.48 dBi 2 a=area of feed mouth pi*(d/2)^2 0.02 Meters Power Density Calculations Region Maximum Power Density in Region Hazard Assessment 2 Formula Value (W/m ) (based on FCC limit) 1 Near Field 4nP/A 9.58 < FCC MPE Limit 2 Far Field GP/(4(pi)L 2) 4.10 < FCC MPE Limit 3 Transition greater of near or far 9.58 < FCC MPE Limit 4 Near Reflector Surface 4 P/A 13.69 < FCC MPE Limit 5 Between Reflector and Ground P/A 3.42 < FCC MPE Limit 6 Between Feed and Reflectors 4 P/a 22,044.27 Potential Hazard

STRAT OS Attachment 2 July 25, 2003 Sylvia Lam International Bureau Satellite and Radio Communication Division 445 128 St. S.W Washington, D.C. 20554 Dear Ms. Lam: As requested, please use the following name and contact information for our 24—hour support: Mr. David Heximer 337—258—2559 Emergency Alternate: Mr. Jim Soileau 337—258—2521 Sincerely, Shief W Seobct Shery! W Scobel Manager — Interconnect & Regulatory Affairs 701 Poydras Street, Suite 1550 + New Orleans, Louisiana 70139 Tel: (800) 600.9610 + Fax: (504) 323:2768 + website: in stratosglobal.com

Attachment 3 This is to certify operations between Stratos Offshore Service Company‘s proposed 6.1 meter earth station in Scott, LA and the PANAMSATIR @45 WL, PAS 8B@43 WL, and GE—3@ 87 WL in the 13.75 — 14 GHz band are in accordance with Section 25.204(f) and footnote US357 to Section 2.106 of the Commission‘s Rules. In particular, the E.LR.P. density of emission from the proposed 6.1 meter earth station operating with the PANAMSATIR, PAS 8B, and GE—3 satellites does not exceed 71 dBW in any 6 MHz from 13.77 to 13.78 GHz. Shet 10\ 3Cdlc 9 —17—0 3 Sheryl W. Scobel Manager Regulatory September 17, 2003

Exhibit For Scott, LA Earth Stations Compliance with FCC Report & Order (FCC96-377) for the 13.75 - 14.0 GHz Band Analysis and Calculations 9/15/03 1. Background This Exhibit is presented to demonstrate the extent to which the Stratos Offshore Services Company satellite earth station planned for Scott, Louisiana is in compliance with FCC REPORT & ORDER 96-377. The potential interference from the earth station to US Navy shipboard radiolocation operations (RADAR) and the NASA space research activities in the 13.75 - 14.0 GHz Band is addressed in this exhibit. The parameters for the earth station are: Table 1. Earth Station Characteristics • Coordinates : 30° 14’ 36.7’’ N, 92° 03’ 06.4’’ W (NAD83) • Satellite Location for Earth Station: PAS 3R @ 43° W.L., PAS 1R @ 45° W.L., AMC-3 @ 87° W.L. • Frequency Band: 13.75-14.5 GHz for uplink 11.7-12.2 GHz for downlink • Polarizations: Circular Feed, L • Modulation Digital Data, 100 kHz, 200 kHz, 1.4 MHz, 2.4 MHz, 2.8 MHz, 4.9 MHz • Maximum Required Uplink EIRP: 68 dBW/Carrier or 68 dBW /10 MHz • Transmit Antenna Characteristics Antenna Size: 6.1 meter Antenna Type/Model: TriPoint Global Transmit Gain: 56.9 dBi • RF power into Antenna Flange: 11.1 dBW or 11.1 dBW/10 MHz (Maximum) • Elevation Angle: Earth Station Scott, LA 26.7° toward the PAS-3R (43o W.L.) 54.3° toward the AMC-3 (87o W.L.) • Azimuth Angle (Ref North): Earth Station Scott, LA 113.6° for PAS-3R 170.0° for AMC-3 • Side Lobe Antenna Gain: 32- 25*log(θ)

Because the above spectrum is shared with the Federal Government, coordination in this band require resolution data pertaining to potential interference between the earth stations and both Navy Department and NASA systems. Potential interference from the earth station could impact with the Navy and/or NASA systems in five areas. These areas are noted in FCC Report and Order 96-377 dated September 1996, and consist of (1) Radiolocation and radio navigation, (2) Data Relay Satellites, (3) Precipitation Radar, (4) Altimeters, and (5) Scatterometers. Summary of Coordination Issues: 1) Potential Impact to Government Radiolocation (Shipboard Radar) 2) Potential Impact to NASA Data Relay Satellite Systems (TDRSS) 3) Potential Impact to NASA/NASDA Operations (Precipitation Radar) 4) Potential Impact to NASA Operations (Altimeters) 5) Potential Impact to NASA Operations (Scatterometers) 2. Potential Impact to Government Radiolocation (Shipboard Radar) Radiolocation operations (RADAR) may occur anywhere in the 13.4 - 14 GHz frequency band aboard ocean going United States Navy ships. The Federal Communication Commission (FCC) order 96-377 allocates the top 250 MHz of this 600 MHz band to the Fixed Satellite Service (FSS) on a co-primary basis with the radiolocation operations and provides for an interference protection level of -115 dBW/m2 /10 MHz based upon WRC-2003. The closest distance to the shoreline from the Scott, Louisiana earth station is approximately 30 miles North of the Gulf of Mexico near Vermilion Bay. The calculation of the power spectral density at this distance is given in the next two subsections. The RADAR characteristics used for the calculations are presented in Table 2. Table 2. RADAR Characteristics Transmitter Parameters Transmit Power* 250 kWatts Frequency Range 13.4-14.0 GHz Spectral Density Transmitted at the Tuned Frequency Pulse Width** 0.5 µs 25.8 dBW/4kHz Pulse Width** 1.0 µs 28.8 dBW/4kHz Pulse Width** 2.0 µs 31.8 dBW/4kHz Pulse Rate** 1200 pulses per second Emission Characteristics Sin(θ)/θ Roll-Off Mode of Operation Pulse Doppler Detection

Antenna Parameters Shape* Circular and Parabolic Physical Size* 1.5 m2 Antenna Gain at 14 GHz* 44.3 dB Antenna Motion* 360° Rotation in Detection Mode Track Mode after Target lock-on and Weapon-on Effective Area of Antenna Main Beam* 1.0 m2 Side Lobe Gain -10.0 dB Antenna height 51 feet Receiver Parameters Noise Figure* 8 dB Doppler Filter for Mach 1 31 kHz Interference Criteria -115 dB (W/m2 /10 MHz) The earth station’s power flux density was calculated at the azimuth of the Pas 3R Satellite at 113.6 degrees azimuth. The signal density at this point on the shoreline, considering over-the- horizon loss is: PFD = Ant enna Feed Power density (dBW/10 MHz) + Antenna Off-Axis Gain (dBi) – Spread Loss (dBW-m2 ). = 11.1 dBw/10 MHz - 4 dBi – 10*log[4Π*(48,460m)2 ] = -97.6 dBW/m2 /10 MHz + Additional Path Losses (29 dB) = -126.6 dBW/m2 /10 MHz Our calculations show additional path loss of 29 dB at 1% controlling to the coastline for this earth station. See profile data attached in Annex 1. These levels are in compliance with the new interference criteria requirements of -115 dBW/m2 /10 MHz. 3. Potential Impact to NASA’s Data Relay Satellite System (TDRSS) The geographic location of the Stratos Offshore Services Company earth station in Scot, Louisiana is outside the 390-km radius coordination contour surrounding NASA’s White Sands, New Mexico ground station complex. Therefore, the TDRSS space-to-earth link will not be impacted by the Stratos Offshore Services Company earth station in Scott, LA. The TDRSS space-to-space link in the 13.772 to 13.778 GHz band is assumed to be protected if an earth station produces an EIRP less than 71 dBW/6 MHz in this band. The 6.1-meter earth station dish will have an EIRP smaller than 71 dBW in this band. The earth station will uplink no more than 68 dBW EIRP total, therefore, there will be no interference to the TDRSS space-to-space link.

The Scott, Louisiana earth station can be tuned to operate at the frequencies in the 13.772 to 13.778 GHz Band. 4. Potential Impact to NASA/NASDA Operations (Precipitation Radar) The Tropical Rain Measuring Mission (TRMM) Precipitation Radar (PR) operates at two frequencies 13793 and 13805 MHz with a bandwidth of 600 kHz at each frequency. The FCC Report and Order 96-377 grants NASA protection to the spacecraft borne sensors like those used for the TRMM in the 13.75 to 14.0 GHz band until January 1, 2001. The 6.1-meter antenna system will have an EIRP of 68 dBW/100 kHz or 68 dBW/600 kHz. The ITU-R SA. 1071 states that the recommended threshold of interference at the two TRMM frequencies is -150 dBW. The geographic location of the Stratos Offshore Services Company earth station antenna is outside the TRMM PR ground truth exclusion zones described in ITU-R SA. 1071. For the earth station antenna location, the antenna coupling to the space borne antennas can be earth station sidelobe to TRMM PR sidelobe, and earth station side lobe to TRMM PR main beam. The coupling to the TRMM PR main beam is the worst case, therefore, it will be the one calculated. The calculation will be made for an overhead pass of the TRMM PR satellite having a ±17° cross-track scan. The calculation will be made for scan angles of 0°, 8.5°, and 17°. Table 2. Calculation Parameters for TRMM PR The parameters for the calculation are: TRMM Range @0° Scan Angle: 350 km TRMM Range @8.5° Scan Angle: 354 km TRMM Range @ 17° Scan Angle: 366 km TRMM Antenna Gain: 47.7dBi Earth Station Elevation Angle: 26.7° (worst case) 6.1-meter Antenna Gain: 56.9 dBi Earth Station Side Lobe Antenna Gain: 32 - 25*log(θ)or, ≥ -10 dB Where θ is the angle between the Earth Station antenna and the TRMM antenna. EIRP spectral density for Antenna : 68 dBW Transmit Power 11.1 dBW/ 100 kHz or 11.1 dBW/600 kHz FSL @ 350 km 166.2 dB FSL @ 354 km 166.3 dB FSL @ 366 km 166.6 dB

Table 3. TRMM PR Calculated Results 6.1-meter Antenna Transmit Power = 11.1 dBW/600 kHz Calculations at Antenna Elevations 26.7° Scan Angle ES Antenna Gain TRMM Gain FSL Power Received Margin 0° -10 dBi 47.7 dBi 166.2 dB -117.4 dBW - 32.6 dB 8.5° -10 dBi 47.7 dBi 166.3 dB -117.5 dBW - 32.5 dB 17.0° -9.6 dBi 47.7 dBi 166.6 dB - 117.4 dBW - 32.6 dB From the calculated results the earth station will not meet the interference criteria for an EIRP of 68 dBW/100 kHz. Since, the NASA TRMM PR was protected only until January 1, 2001, this earth station can operate in this band. However, the government should be aware that the earth station at Scott, Louisiana could cause interference into the frequencies of the TRMM PR. Even though the earth station at Scott, Louisiana is within ± 55° latitude, and the elevation angle is 26.7° which is below the maximum of 71° recommended in the ITU-R SA.1071, the levels calculated indicate there will be an interference conflict at the operational frequencies of the TRMM PR. 5. Potential Impact to Altimeter Operations There are two families of airborne radar altimeters operating in the 13.75 - 14.0 GHz band that are of concern with respect to interference from earth stations. They are the TOPEX- POSEIDON and the ERS-1/2. These radar altimeters are downward looking pulsed-radar installed on orbiting spacecraft. These systems are used to very precisely measure range from the satellite to the surface of the earth. In addition to the operational radar in this band, a number of other systems are planned in the future. The parameters for the operational radar in this band are listed below. Table 4. Altimeter Interference Criteria Radar System Frequency of Operation Interference Criteria TOPEX-POSEIDON (1) 13.60 GHZ ± 160 MHz - 117 dBW/320 MHz TOPEX-POSEIDON (2) 13.65 GHz ± 160 MHz - 130 dBW/320 MHz ERS -1/2 13.77 GHz ± 165 MHz - 120 dBW/330 MHz The orbiting spacecraft, with the radar altimeter, is assumed to be at an altitude of 800 km. The slant range from earth station to the spacecraft is 1780.5 km at the elevation 26.7° when the earth station main beam illuminates the spacecraft. This is the worst case alignment of the earth station antenna and the spacecraft radar antenna. It will occur when the spacecraft travels through the main beam circle formed by the earth station antenna. The time it takes the spacecraft to travel through this circle in space is a function of the 20-dB beam width of the earth

station antenna (the 20-dB beam-width is used according to ITU Appendix S7 calculation methods) and the speed of the spacecraft. The spacecraft is traveling at 6.5 km/sec and the 20- dB beam width of the 6.1-meter antenna is estimated to be 0.52°. The diameter of the circle in space formed by the 6.1-meter antenna is 16.1 km at a range of 1780.5 km. The spacecraft will pass through the beam-width of the earth station’s antenna at the elevation 26.7° in approximately 2.5 seconds. During this time, there may be a small blip of noise introduced into the radar display but it would be so transitory it may go unnoticed. The availability requirement for the NASA altimeter data is 95%, which assumes that the associated individual outages are brief and randomly dispersed over all observation times and areas. If the outage were due to only one earth station the 95% availability would not be a problem. However, the outage caused by the earth station and other causes such as intense rainfall must be accounted for in determining the net availability of the system. Because the earth station interference will occur in a predictable manner for a given area it cannot be considered random. However, because of its predictability and relatively short time duration, it should have very little impact on the operation of present radar systems, and processing circuits and/or procedures can be designed in future systems to minimize the effect of the interference from single or multiple earth stations. In order to calculate the interference level to the altimeter radar, we will assume that the side lobe gain toward the earth station antenna is -10 dB. Since the earth stations signal is narrow band compared to the RADAR bandwidth, the signals will be totally captured by the radar receiver. The following parameters are used in the calculation: FSL for Antenna @ elevation 26.7o : 180.4 dB Atmospheric Absorption: 1.2 dB EIRP 6.1-meter Antenna: 68 dBW Table 5. Altimeter Calculated Results Earth Station for 68 dBW @ Elevation 26.7°° Radar Receiver Interference Level Margin TOPEX-POSEIDON (1) - 123.6 dBW + 6.6 dB TOPEX-POSEIDON (2) - 123.6 dBW - 6.4 dB ERS-1/2 - 123.6 dBW + 3.6 dB The comparison of these levels to the interference criteria indicates that there will be interference coupled to the TOPEX (2) altimeter. However, if the Scott, Louisiana earth station generates some interference to the altimeters, the net result will not prevent the 95 % availability of the RADAR data. For example, if the earth station interfere with a satellite altimeter at the elevation angle 26.7°, a very unlikely condition, the total outage time would be 2.5 seconds. This would

occur in a period of two hours which would mean the earth station would reduce the availability of the altimeter data by 0.035% which would still allow for a data availability of over 99.96% versus the required 95%. This would be the extreme worst case since the probability of the satellite passing through the main beam of the earth station antenna in the same orbit is very unlikely. The Scott, Louisiana site of the earth station places them outside the TOPEX-POSEIDON critical exclusion zone as defined in the ITU-R Recommendation SA. 1071. The operational elevation look angles for the proposed earth station is 26.7° (PAS-3R), 28.4o (PAR-1R), and 54.3o (GE-3). These elevation angles are below the 71 °-elevation angle limitation required until January 1, 2001 in ITU-R Recommendation SA-1071. 6. Potential Impact to NASA Scatterometer Operations Scatterometers are spacecraft borne RADAR type devices that measure the near surface vector winds over the ocean. Wind data over the oceans is considered a critical parameter in the determination of weather patterns and global climate. The overall availability requirement of the scatterometer system is similar to the altimeter radar. That is, some data loss is tolerable when interference signals exceed interference thresholds. The scatterometers can lose 1% of the ocean data from interference occurring systematically or 5% when the interference is occurring randomly. The scatterometers operate at a center frequency of 13995 MHz ± 1.44 MHz. There are two types of antenna modes of operation, fan beam and spot beam. For fan beam the aggregate interference threshold is - 174 dBW/2 kHz, for spot beam - 155 dBW/10 kHz. ITU-R SA. 1071 Recommendation states that to protect scatterometers using fan beams from unacceptable interference until 1 January 2001, FSS earth stations should not exceed an EIRP density toward the scatterometer orbit over the oceans of 25 dBW in any 2 kHz band between 13.99356 GHz and 13.99644 GHz. The Stratos Offshore Services Company earth station at Scott, Louisiana could produce an EIRP greater than 25 dBW in the scatterometer frequency band. The government should be aware that there might be interference to the scatterometer system. However, since the protection date of January 1, 2001 has passed, the Scott, Louisiana earth station can be tuned to operate at the frequencies in the scatterometer band. 7. Coordination Issue Result Summary and Conclusions The results of the analysis and calculations performed in this exhibit indicate that compatible operation between the earth station at the Scott, Louisiana earth station and the US Navy and NASA systems is possible if certain operational precautions are taken. These precautions involve avoidance of certain frequency ranges by the earth station so that interference will not occur to NASA operations. Table 6 provides the frequency ranges to be avoided.

Table 6 Frequency Range where Potential Interference Could Occur System Frequency Range (MHz) TRMM PR 13,792.7 - 13,793.3 TRMM PR 13,804.7 - 13,805.7 Scatterometer 13,993.56 - 13,996.44 Since the protection date has passed for these frequency ranges these frequencies will not be excluded from the earth station’s operation. No interference to NASA’s Data Relay Satellite Systems (TDRSS) operations from the Scott, Louisiana site. The 6.1-meter antenna at Scott, LA can be tuned to the frequencies in the 13.772 to 13.778 GHz Band. The NASA altimeter data availability requirement of 95 % will not be degraded by the Scott, Louisiana earth station operations. No interference to US Navy RADAR operations from the Scott, Louisiana site earth station will occur.

Annex 1 – OH Loss to Shoreline Calculations Pathloss Calculation Path data for case # 1 SCOTT LA COAST 1 Latitude 30 14 36.7 29 49 1.0 Longitude 92 3 6.4 91 56 31.4 Antenna Center Agl ..... 12.01 ft. 3.66 m. 50.86 ft. 15.50 m. Site Elevation Amsl .... 37.01 ft. 11.28 m. 0.00 ft. 0.00 m. Antenna Center Amsl .... 49.02 ft. 14.94 m. 50.86 ft. 15.50 m. Effective Antenna Ht ... 20.20 ft. 6.16 m. 50.86 ft. 15.50 m. Horizon Distance ....... 6.84 mi. 11.00 km. 12.49 mi. 20.10 km. Horizon Elevation Amsl . 35.04 ft. 10.68 m. 13.29 ft. 4.05 m. Ray Crossover Angle .... 2.93 mr. Terrain Delta Ht ....... 4.42 ft. 1.35 m. Effective Distance ..... 86.71 mi. 139.51 km. Pathlength ............. 30.12 mi. 48.46 km. Azimuth ................ 167.36 deg. 347.41 deg. Frequency .............. 13750 MHz K Factor ............... 1.33 (K) Radio Climate Phrase ... Maritime Temperate Climate Over Land Type of Path ........... Spherical Diffraction Free Space Path Loss ... 148.9 dB Atmospheric Loss ... 1.149 dB Diff. Loss .... 51.7 dB (200.6 dB) Tropo. Loss ... 52.7 dB (201.6 dB) Terrain data type ...... 1.0 ARC Second Losses L-Fspl Sigma Controlling Propagation Mode ------ ------ ----- ----------- ---------------- 190.5 dB 41.6 dB 3.9 dB 20. % Troposcattering 177.8 dB 29.0 dB 6.0 dB 1. % Troposcattering 170.6 dB 21.7 dB 7.4 dB 0.1 % Troposcattering 164.8 dB 15.9 dB 8.6 dB 0.01 % Troposcattering 163.4 dB 14.6 dB 8.9 dB 0.0025% Troposcattering The OH loss calculations considered a terrain profile of 200 points. The list below shows the highest point in each fiftieth of the path length. K=Inf. K= 1.33 K=Inf. K= 1.33 Dist. Elev. Obstr. Clrnce. Clrnce. Dist. Elev. Obstr. Clrnce.Clrnce. (km.) (m.) (m.) (m.) (m.) (km.) (m.) (m.) (m.) (m.) --------------------------------------- -------------------------------------- 0.00 11.3 3.7 0.0 0.0 24.69 4.6 0.0 10.6 -24.0 0.73 12.2 0.0 2.7 0.7 25.42 4.9 0.0 10.3 -24.2 0.98 12.2 0.0 2.8 0.0 26.40 4.7 0.0 10.5 -23.8 2.20 11.0 0.0 4.0 -2.0 27.38 4.0 0.0 11.3 -22.8 2.93 10.7 0.0 4.3 -3.6 28.36 4.1 0.0 11.2 -22.4 3.91 10.7 0.0 4.3 -6.0 29.09 0.6 0.0 14.7 -18.5 4.89 9.4 0.0 5.6 -7.0 30.07 0.6 0.0 14.7 -17.9 6.11 9.3 0.0 5.7 -9.6 31.29 1.5 0.0 13.8 -17.9 7.58 7.1 0.0 7.9 -10.4 32.02 1.5 0.0 13.8 -17.2 8.31 9.5 0.0 5.5 -14.2 33.00 1.5 0.0 13.8 -16.3 9.29 9.1 0.0 5.9 -15.5 33.98 1.5 0.0 13.8 -15.2 10.51 9.8 0.0 5.3 -18.3 34.96 1.2 0.0 14.1 -13.7 11.00 10.7 0.0 4.4 -19.9 35.94 0.9 0.0 14.5 -12.1 11.98 9.2 0.0 5.9 -19.9 36.91 0.6 0.0 14.8 -10.4 13.45 9.8 0.0 5.3 -22.5 37.89 0.3 0.0 15.1 -8.5 13.93 9.3 0.0 5.8 -22.6 38.87 0.3 0.0 15.1 -6.9 15.16 7.0 0.0 8.2 -21.6 39.85 0.3 0.0 15.1 -5.1 15.89 8.1 0.0 7.1 -23.5 40.83 0.3 0.0 15.1 -3.3 16.62 7.6 0.0 7.5 -23.7 41.80 0.3 0.0 15.1 -1.3 18.09 8.0 0.0 7.1 -25.2 42.78 0.3 0.0 15.1 0.8

18.82 6.0 0.0 9.2 -23.7 43.76 0.3 0.0 15.1 3.0 19.80 6.0 0.0 9.1 -24.3 44.74 0.3 0.0 15.2 5.3 20.78 5.8 0.0 9.4 -24.5 45.96 0.3 0.0 15.2 8.4 22.25 5.6 0.0 9.6 -24.8 47.43 0.3 0.0 15.2 12.3 22.73 6.0 0.0 9.2 -25.3 47.67 0.3 0.0 15.2 13.0 24.20 4.3 0.0 10.9 -23.7 48.46 0.0 15.5 0.0 0.0


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