O3b CODA Lab - updat

SUPPLEMENT submitted by O3b Limited

Updates to STA Request for CODA Lab

2014-03-07

This document pretains to SES-STA-20131228-01209 for Special Temporal Authority on a Satellite Earth Station filing.

IBFS_SESSTA2013122801209_1038958

O3b Limited 900 17th Street NW Suite 300 Washington DC 20006 www.o3bnetworks.com March 7, 2014 VIA ELECTRONIC FILING Marlene H. Dortch Secretary Federal Communications Commission 445 12th Street, SW Room TW-A325 Washington, D.C. 20554 Attn: Satellite Division, International Bureau Re: Updates to Special Temporary Authority Request for CODA Lab earth station in San Diego, California File No. SES-STA-20131228-01209 Dear Ms. Dortch: On December 23, 2013, O3b Limited (“O3b”) submitted an application for Special Temporary Authority (“STA”) to operate an earth station in San Diego, California, for testing and demonstration purposes only, for a 30-day period, beginning January 31, 2014. On January 24, 2014, O3b updated the STA need date to May 1, 2014. Please find attached hereto updated information related to O3b’s STA request, as described below. • Minor corrections have been made to one of the link budgets submitted by O3b on December 23, 2013, in Annex 3 of the STA request. Specifically, the introductory chart and Table 4 have been updated. This has reduced the transmitted EIRP by 6 dB and so will not result in any increased interference. • One part of the Form 312 Schedule B submitted by O3b on December 23, 2013, in Annex 1 of the STA request has been updated. Specifically, sections E56, E57, E58, and E59 have been updated. This relates only to the minimum elevation angle and associated azimuth angles that will be used by this earth station, where the minimum elevation angle has increased thereby reducing the possibility of interference to terrestrial services. • Minor corrections have been made to the Transfinite report submitted by O3b on December 23, 2013, in Annex 6 of the STA request. The Transfinite report now reflects the correct 20W transmit power that is given in the Schedule B. The corrections to the Transfinite report have no impact on Transfinite’s conclusion, based on its analysis, that both the short term and long term interference zones are fully contained within the U.S. borders. Please direct any questions to the undersigned. Sincerely, /s/ Joslyn Read Joslyn Read Vice-President, Regulatory Affairs O3b Limited Joslyn.Read@o3bnetworks.com 202 352 5985 cc: Paul Blais (by email)

Minor correction to Annex 3 introductory chart. The chart on the first page of Annex 3 is replaced with the following chart. Changed parameters are highlighted in Gray bold. Carrier MODCOD Table # 216MHz in each direction, clear sky 8PSK/0.75 FWD 1,2 QPSK/0.75 RTN 54MHz in each direction, clear sky 16APSK/0.83 FWD 3,4 QPSK/0.75 RTN

Minor correction to Annex 3 Table 4. Table 4 of Annex 3 is replaced with the following table. Changed parameters are highlighted in Gray bold. O3b Network Link Analysis - Tier 2 Service For San Diego, United States Link Budget Creator - Rev 3.2.9: February 21, 2014 Tier 2 Tier 2 Ground Parameter Teleport Telco Location Vernon (RHCP), United States San Diego, United States Latitude (°) 34.2 32.7 Longitude (East) (°) 260.7 242.8 E/S Maximum Range to SV (km) 10445.4 9742.0 E/S Minimmum Elevation to SV (°) 26.2 36.0 E/S Altitude (km) 0.3 0.2 SV Beam Identifier (#) 13 Minutes Into Pass (Sample #15) (Min) 6:46 Telco Spot Beam Off-Angle (°) 0.20 Telco Spot Beam Diameter (km) 67.80 Maximum Roundtrip Latency (msec) 134.68 Modulation Parameters Forward Return Enter Receiver Type DVB-S2 DVB-S2 Modem Overhead (%) 3.3% 3.2% Number of Carriers per Channel (#) 1 1 Available Bandwidth (Hz) 54,000,000 54,000,000 Channel Symbol Rate (sps) 45,000,000 45,000,000 Channel Modulation Type 16APSK QPSK Channel FEC Rate 0.83 0.75 Channel Spectral Efficiency (bits/Sym) 3.33 1.50 Channel Throughput (100% / 100% of Full Rate) (bps) 144,983,818.77 65,343,428.88 Uplink Forward Return E/S Tx Channels per HPA (#) 5 1 E/S Tx Carrier Frequency (MHz) 28,280 28,280 E/S Tx HPA Power Level (W) 125 20 E/S Tx OBO (dB) -4.00 -6.50 E/S Tx Post-HPA Losses (dB) -2.24 -0.28 E/S Tx Antenna Gain (7.3 m / 1.2 m) (dB) 64.90 46.3 E/S Tx EIRP Per Channel (dBW) 72.64 52.56 E/S Tx Radome & Pointing Loss (dB) -0.50 -1.00 E/S Tx RF Link Availability (%) 75.000 70.000 E/S Tx Atmospheric Losses (dB) -1.42 -0.59 E/S Tx Spreading Loss (dB) -151.37 -150.77 Satellite Forward Return SV Number of Channels per HPA (#) 1 5 SV Rx G/T (dB/K) 5.32 4.43 SV Rx Power Per Tier (dBW) -125.82 -145.84 SV Rx Flux Density Per Tier (dBW/m2) -80.65 -99.79 SV Tx OBO (ALC / ALC) (dB) -3.80 -5.80 SV Tx Post-TWTA Losses (dB) -1.50 -1.50 SV Tx Antenna Gain (dBi) 31.57 31.80 SV Tx EIRP Per Channel/Carrier (dBW) 44.40 35.64 SV Tx Pointing Loss (dB) 0.00 0.00 Downlink Forward Return E/S Rx Carrier Frequency (MHz) 18,480 18,480 E/S Rx Spreading Loss (dB) -150.77 -151.37 E/S Rx RF Link Availability (%) 70.000 75.000 E/S Rx Atmospheric Losses (dB) -0.36 -0.84 E/S Rx Pointing Loss (dB) -1.00 -0.50 E/S Rx Antenna Gain (1.2 m / 7.3 m) (dBi) 42.51 62.04 E/S Rx Effective G/T (dB/K) 19.08 38.68 E/S Rx Power Per Channel (dBW) -112.00 -101.82 E/S Rx Flux Density Per Channel (dBW/m2) -107.72 -117.07 Total Link Forward Return Carrier / Noise Bandwidth (dB) 76.53 76.53 Carrier / Noise Uplink (dB) 26.25 6.23 Carrier / Noise Downlink (dB) 16.64 26.88 Carrier / Intermodulation Im (C/Im) (dB) 23.53 23.28 (C/N) - Total Actual (dB) 14.99 6.05 (C/N) - Total Required (dB) 13.70 5.70 (Eb/No) - Total Actual (dB) 9.77 4.29 (Eb/No) - Total Required (dB) 8.47 3.94 Excess Margin (dB) 1.29 0.35 Fade Margin (dB) 17.19 8.25

Minor correction to Annex 1 Form 312 Schedule B. Sections E56, E57, E58, and E59 are updated. Changed parameters are highlighted in Gray bold.

Minor correction to Annex 6 Transfinite Report. The updated Transfinite report is on the following pages.

TN: ES in San Diego Page 1 Technical Note O3b San Diego Gateway Coordination Date: Revised 5th March 2014 1 Document Scope This describes analysis undertaken by Transfinite Systems Ltd for O3b to generate a coordination contour for an Earth Station (ES) of O3b’s non-GSO network in San Diego. In addition more detailed interference zones were generated using terrain data and interference criteria from Recommendation ITU-R SF.1006. Finally a Monte Carlo analysis was undertaken to identify the scope to use that methodology to convolve ES antenna pointing and propagation statistics. 2 Scenario Parameters 2.1 Earth Station Parameters Used The ES parameters were taken from: 1. Email of 25th November 2013 with location and height parameters 2. Box files shared on 25th November 2013 with antenna gain patterns 3. FCC application emailed on 21st November 2013 2.2 O3b ES Location From reference 1: Latitude: 32° 40’ 54.3” N Longitude: 117° 7’ 0.1” W Antenna height: 12.5m above ground level Ground height : 5.33m above sea level Total antenna height 17.83m above sea level Table 1: O3b ES Location 2.3 O3b ES Antenna Gain Pattern From reference 2 the ES antenna gain pattern has been measured at 29.1 GHz and is shown in the figure below: Confidential

TN: ES in San Diego Page 2 50 40 30 20 10 Gain (dBi) 0 ‐10 ‐20 ‐30 ‐40 ‐50 ‐180‐160‐140‐120‐100 ‐80 ‐60 ‐40 ‐20 0 20 40 60 80 100 120 140 160 180 Azimuth (deg) Figure 1: ES Antenna Gain Pattern Slice The peak gain in the measured data file was 48.2 dBi and the minimum operating elevation angle was taken as 20º. For generation of the Appendix 7 coordination contour the following simplified assumptions were made: Gain pattern: ITU‐R Rec. S.580‐6 Peak gain: 48 dBi Beamwidth: 0.6° Table 2: O3b ES Simplified Antenna Pattern for Appendix 7 Calculations It is assumed the measurement missed the very narrow beam’s peak gain and hence the highest gain value in the table was 0.3 dB below the specified peak gain. However this wouldn’t impact the analysis as the minimum elevation angle constraint implies that gain values below 20 degrees off-axis would not be used. 2.4 O3b Transmit Link From References 1, 2 and 3: Confidential

TN: ES in San Diego Page 3 Transmit frequency: 29.1 GHz Transmit power: 13 dBW Reference bandwidth: 216 MHz Table 3: O3b ES Transmit Link Parameters 2.5 O3B Constellation The following parameters were used for the O3b non-GSO satellite constellation: Type and service: Non‐GSO FSS Orbit inclination: 0° Orbit height: 8,062 km Table 4: O3b Constellation 2.6 Appendix 7 Parameters The values for transmit ES are shown in the table below from RR Appendix 7: Figure 2: Extract from Appendix 7 for Transmit ESs Footnotes: 2. Non-geostationary satellites in the fixed-satellite service. Confidential

TN: ES in San Diego Page 4 3 Appendix 7 Coordination Contour The Visualyse Coordinate tool can be used to generate ES coordination contours according to the algorithm in ITU-R RR Appendix 7. The algorithm ensures that the contour is never less than around 100 km in radius, as shown in the figure below: Figure 3: Transmit Coordination Contour With the ES less than 20 km inside the US and a minimum contour size of 100 km, the coordination contour can be expected to cross the border into Mexico. 4 Recommendation ITU-R SF.1006 Interference Zone 4.1 Sharing Criteria The approach in Appendix 7 is to use an agreed set of parameters in the Radio Regulations that can only be changed at World Radiocommunication Conferences. These are by nature conservative as they are used as coordination triggers and in detailed coordination actual parameters would be used. Given that the methodology in Appendix 7 is conservative there are three mechanisms that can be used to reduce the size of the coordination contour: 1. Remove the requirement for a minimum distance of 100 km Confidential

TN: ES in San Diego Page 5 2. Use actual or at least more realistic parameters including sharing criteria and ES antenna gain pattern 3. Include the effect of terrain This approach can be undertaken by using the thresholds in:  Rec. SF. 1006: Determination of the interference potential between earth stations of the fixed-satellite service and stations in the fixed service In addition it is worth reviewing typical usages of the band and equipment types. 4.2 Recommendation ITU-R SF. 1006 This recommendation provides a methodology and table of parameters to calculate sharing criteria, and in general the values are similar to those in Appendix 7, as shown in the table below: Parameters From SF.1006 From App.7 Frequency band 29 GHz 29 GHz Interferer FSS FSS Victim FS FS p1 (%) 20 n/a p2 (%) 0.005 0.005 n2 1 2 B (Hz) 1.00E+06 1.00E+06 J (dB) 0 n/a W (dB) 0 0 Tr (K) 3200 2000 Ms (dB) 25 25 Nl (db) 0 0 Table 5: Rec. SF.1006 vs. Appendix 7 Parameters SF.1006 gives long term thresholds as well as short term ones, plus there is also a difference in the receive temperature for the FS. The following interference thresholds were used: Threshold Short term Long term p (%) 0.005 20 I (dBW) -108.6 -133.5 Table 6: Interference Thresholds from SF.1006 Confidential

TN: ES in San Diego Page 6 4.3 FS Antenna Sizes The primary use of these bands is for mobile backhaul where a significant factor is to keep costs low. This means that operators are unlikely to use antennas larger than 30cm, which corresponds to peak gains of 37 dBi at 29 GHz. 4.4 Terrain Database The ASTER2 database was used. This has a horizontal resolution of 30m between pixels and is a surface database so it includes some of the effects of buildings. However its resolution means it is unable to identify specific buildings and cannot in this case be considered to include local clutter around the ES. The figure below shows the ASTER2 terrain / surface details around San Diego: Figure 4: ASTER2 Surface Data This surface data is freely available from the following web site: http://earthexplorer.usgs.gov/ Data is provided subject to terms and conditions available on this web site which includes:  When presenting or publishing ASTER GDEM data, users are required to include a citation stating, "ASTER GDEM is a product of METI and NASA."  The data are provided "as is" and neither NASA nor METI/ERSDAC will be responsible for any damages resulting from use of the data. Confidential

TN: ES in San Diego Page 7 4.5 O3b Horizon Gain Another factor to consider is how the O3b ES gain towards the horizon varies as the constellation moves. It was noted that this pattern was not symmetric around the zero degrees azimuth line and hence an average pattern was created assuming symmetry around the zero degree azimuth as shown in the figure below: 50 40 30 20 10 Gain (dBi) 0 ‐10 ‐20 ‐30 ‐40 ‐50 0 20 40 60 80 100 120 140 160 180 Offaxis angle (deg) Gain 1 Gain 2 Average Figure 5: ES Antenna Gain Pattern Symmetric Pattern This symmetric pattern was used in a simulation to work out the peak gain towards the horizon for the O3b constellation with minimum elevation angle of 20° as shown in the figure below: Confidential

TN: ES in San Diego Page 8 0 Maximum gain towards horizon (dBi) ‐5 ‐10 ‐15 ‐20 ‐25 0 30 60 90 120 150 180 210 240 270 300 330 360 Azimuth (degrees North) Figure 6: Horizon Gain for O3b 4.6 Mitigation Methods A number of mitigation methods could be used to reduce the impact of the O3b ES on FS links in adjacent countries including:  Include use of the auxiliary contours. As described by Appendix 7, it is unlikely that there will be the worst case geometrical alignment in which the FS antenna is pointing directly at the ES, there is likely to be some antenna gain discrimination. A value of 5 dB is typically used in these cases  Include the FS antenna feed loss: a value of 1 dB would be typical for systems in this band. 4.7 Short Term and Long Term Interference Zones From the parameters in the previous section the following areas where the short and long term interference thresholds are exceeded were generated and then displayed in Google Earth: Confidential

TN: ES in San Diego Page 9 Figure 7: O3b Long Term Interference Zone Figure 8: O3b Short Term Interference Zone Confidential

TN: ES in San Diego Page 10 4.8 Comments It was noted that the interference zones were significantly smaller than those generated assuming Appendix 7. This was because:  The O3b transmit power is relatively low, resulting in an interference zone significantly less than the minimum 100 km contour in Appendix 7.  The assumed FS antenna peak gain in Appendix 7 of 50 dBi was considered larger than would be typically used in this band  The measured antenna gain pattern had lower far off-axis sidelobes than those assumed in Rec. ITU-R S.580-6 Taking into consideration the above, it was noted that both the short term and long term interference zones are fully contained within the U.S. borders. Confidential


Document Created: 2014-03-07 14:27:48
Document Modified: 2014-03-07 14:27:48
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