Attachment SESSTA2014081900666.

SESSTA2014081900666.

DECISION submitted by FCC

STA GRANT WITH CONDITIONS

0000-00-00

This document pretains to SES-STA-20140819-00666 for Special Temporal Authority on a Satellite Earth Station filing.

IBFS_SESSTA2014081900666_1067090

SES—STA—20140819—00666 182014001689 O3b Limited Approved by OMB 3060—0678 APPLICATION FOR EARTH STATION SPECIAL TEMPORARY AUTHORITY APPLICANT INFORMATIONEnter a description of this application to identify it on the main menu: Oil Comm STA — 30 days (Aug 2014) 1. Applicant Name: O3b Limited Phone Number: 202—813—4026 DBA Name: Fax Number: Street: 900 17th Street, NW, #300 E—Mail: joslyn.read@o03bnetworks.com City: Washington State: Country: USA Zipcode: = Attention: Ms Joslyn Read | mescKCS1q3Ch,6@Y —1Olb( | Call Sign\Gt_, GrentDate B':I\;\\\ (ar other identifier) é Emm\Q’ 4A

Applicant: O3b Limited No Call Sign File No.: SES—STA—20140819—00666 O3b Limited is granted special temporary authority (STA), for 30 days, beginning on October 27, 2014, to operate a fixed earth station located at the Oil Comm 2014 convention in Houston, TX, to communicate with its NGSO FSS system licensed by the United Kingdom. Operations pursuant to this STA are limited to testing and demonstration purposes only and is subject to the terms of its application, the Commission‘s Rules, and the following conditions. 1. Operations are limited to the following frequency bands and emissions: Frequency Band Emissions Maximum E.LR.P. Maximum E.LR.P. Density 28.35—28.4 GHz 54AMGT7D 61.5 dBW 21 dBW/4kHz 18.3—18.6 GHz 54AMG7D Operations are on a secondary basis and O3b must not cause harmful interference to stations operating on a primary basis and must not claim protection from stations operating on a primary basis. Grant of this authorization is without prejudice to any determination that the Commission may make regarding any pending or future application to communicate with O3b‘s NGSO FSS system. Any action taken or expense incurred as a result of operations pursuant to this special temporary authority is solely at O3b‘s risk. This action is issued pursuant to Section 0.261 of the Commission‘s rules on delegated authority, 47 C.F.R. § 0.261, and is effective immediately. wiseS¥Si633h10%1>,00b60ib | calt Signm_WMMA\

2. Contact Name: Joseph A. Godles Phone Number: 202—429—4900 Company: Goldberg Godles Wiener & Wright Fax Number: 202—429—4912 LLP Street: 1229 19th Street, NW E—Mail: jgodles@g2w2.com City: Washington State: DC Country: USA Zipcode: 20036 —2413 Attention: Relationship: Legal Counsel (If your application is related to an application filed with the Commussion, enter either the file number or the IB Submission ID of the related application. Please enter only one.) 3. Reference File Number or Submission ID 4a. Is a fee submitted with this application? , fYes, complete and attach FCC Form 159. If No, indicate reason for fee exemption (see 47 C.F.R.Section 1.1114). gy Governmental Entity ¢3 Noncommercial educational licensee C Other(please explain): 4b. Fee Classification CGX — Fixed Satellite Transmit/Receive Earth Station 5. Type Request {3 Use Prior to Grant {) Change Station Location @ Other 6. Requested Use Prior Date 10/24/2014

7. CityHouston 8. Latitude (dd mm ss.s h) 29 45 0.14 N 9. State TX 10. Longitude (dd mm ss.s h) 95 21 37.74 W 11. Please supply any need attachments. Attachment 1: STA request Attachment 2: Attachment 3: 12. Description. (If the complete description does not appear in this box, please go to the end of the form to view it in its entirety.) 03b Limited hereby requests special temporary authority to operate an earth station to be located at the Oil Comm 2014 convention in Houston, TX for the 30—day period between October 24, 2014 and November 23, 2014. 13. By checking Yes, the undersigned certifies that neither applicant nor any other party to the application is @ Yes gy No subject to a denial of Federal benefits that includes FCC benefits pursuant to Section 5301 of the Anti—Drug Act of 1988, 21 U.S.C. Section 862, because of a conviction for possession or distribution of a controlled substance. See 47 CFR 1.2002(b) for the meaning of "party to the application" for these purposes. 14. Name of Person Signing 15. Title of Person Signing Joslyn Read Vice President, Regulatory Affairs WILLEFUL FALSE STATEMENTS MADE ON THIS FORM ARE PUNISHABLE BY FINE AND / OR IMPRISONMENT (U.S. Code, Title 18, Section 1001), AND/OR REVOCATION OF ANY STATION AUTHORIZATION (U.S. Code, Title 47, Section 312(a)(1)), AND/OR FORFEITURE (U.S. Code, Title 47, Section 503).

FCC NOTICE REQUIRED BY THE PAPERWORK REDUCTION ACT The public reporting for this collection of information is estimated to average 2 hours per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the required data, and completing and reviewing the collection of information. If you have any comments on this burden estimate, or how we can improve the collection and reduce the burden it causes you, please write to the Federal Communications Commussion, AMD—PERM, Paperwork Reduction Project (3060—0678), Washington, DC 20554. We will also accept your comments regarding the Paperwork Reduction Act aspects of this collection via the Internet if you send them to PRA@fce.gov. PLEASE DO NOT SEND COMPLETED FORMS TO THIS ADDRESS. Remember — You are not required to respond to a collection of information sponsored by the Federal government, and the government may not conduct or sponsorthis collection, unless it displays a currently valid OMB control number or if we fail to provide you with this notice. This collection has been assigned an OMB control number of 3060—0678. THE FOREGOING NOTICE IS REQUIRED BY THE PAPERWORK REDUCTION ACT OF 1995, PUBLIC LAW 104—13, OCTOBER 1, 1995, 44 U.S.C. SECTION 3507.

REQUEST FOR SPECIAL TEMPORARY AUTHORITY 03b Limited ("O3b"), pursuant to Section 25.120 of the Commission‘s rules, hereby respectfully requests special temporary authority ("STA") to operate an earth station to be located at the Oil Comm 2014 convention in Houston, TX ("Oil Comm Earth Station"). In this filing, O3b seeks a 30—day STA for the period between October 24, 2014 and November 23, 2014. The Oil Comm Earth Station will be used for non—commercial testing and demonstration purposes, so that the capabilities of O3b‘s system can be exhibited at the Oil Comm 2014 trade show to a large number of representatives from the U.S. energy industry. The Oil Comm Earth Station will simulate diverse data applications on the 03b satellite system, including interactive video and audio teleconferencing, access to enterprise cloud services and very large file transfers. As discussed below, grant of the requested authority is in the public interest as it will allow O3b to test and demonstrate O3b services that could benefit the U.S. energy industry. Test Details and Public Interest Showing The Oil Comm Earth Station will communicate with O3b‘s Ka—band, Medium Earth Orbit, non— geostationary orbit ("NGSO") satellite system* and O3b‘s gateway earth station in Vernon, TX.* The frequencies to be used by the Oil Comm Earth Station are: e 28.35—28.4 GHz (uplink) e 18.3—18.6 GHz (downlink) The Oil Comm Earth Station will consist of two (2) 1.2m antennas manufactured by Orbit, and will operate with a ViaSat MEOLink modem. This Orbit 1.2m terminal is the same Orbit 1.2m terminal for which 03b has previously been granted authority to operate at the Coda Lab location in San Diego, California® and for which authority has been requested in the pending O3b application for a 30—day STA at the Data Technology Solution ("DTS") facility in Breaux Bridge, Louisiana.* The Oil Comm Earth Station antennas will be mounted on a fixed pedestal in the parking lot of George R. Brown Convention Center in Houston. Although the pointing angle of the antennas will change as O3b‘s in—orbit satellites are tracked, the pedestal will remain stationary during the demonstration. * O3b‘s first four satellites were launched on June 25, 2013. O3b‘s second batch of four satellites was launched on July 10, 2014. *License"). See 03b Limited, Call Sign E130021, File No,SES—LIC—20130124—00089,.granted 2PC2C June 20, 2013 ("O3b Texas 3 See O3b Limited, File No. SES—STA—20131228—01209, filed December 23, 2013 ("O3b CODA STA Application"), and which was placed on Public Notice on April 2, 2014 and granted on April 29, 2014. * See 03b Limited, File No. SES—STA—20140731—00627, filed July 31, 2014 ("O3b DTS STA Application").

Grant of this application will serve the public interest, convenience, and necessity by allowing O3b to show how its system can effectively deliver low latency, high throughput service to and from isolated resource extraction operations, such as offshore oil platforms." This capability will allow for better connectivity and living conditions at these remote facilities while supporting the data flow for the safe and efficient extraction of important energy resources. O3b will demonstratethe system‘s capabilities for providing a variety of valuable communications, including voice and video conferencing and enterprise data applications. The O3b System O3b Limited operates a U.K.—authorized, non—geostationary orbit ("NGSO") Fixed—Satellite Service ("FSS") system in the Ka—band. In its initial FCC application, which sought authority for a gateway earth station located in Hawaii, 03b stated that it planned to operate eight NGSO satellites that would be spaced equally, /.e., at 45° intervals.© The Commission granted this application." 03b filed a modification to its Hawaii application on August 14, 2014.8 On August 15, 2014 the FCC granted 03b the flexibility to operate up to two of its eight NGSO satellites as in—orbit spares. The remaining satellites would be equally spaced in O3b‘s authorized orbital plane, and each in—orbit spare would be co—located with a non—spare satellite.> Technical Parameters 03b is attaching the following documents with the technical details of the operations proposed under the requested STA: e Annex 1: FCC Form 312, Schedule B. 03b proposes to operate the Oil Comm Earth Station during this 30—day term in accordance with the parameters specified in the attached Schedule B." * Annex 2: Link Budgets. Representative links for the Oil Comm Earth Station are provided. ° The Oil Comm Earth Station will not, for purposes of the STA, communicate with any offshore platforms or other offsite facilities. The only other points of communication will be O3b‘s space stations and O3b‘s gateway earth station in Vernon, Texas. 6 See Application for Hawaii Earth Station, File No. SES—LIC—20100723—00952, Legal Narrative, Section III and Attachment A thereto (Technical Statement), Section A.2. " See O3b Limited, Call Sign E100088, File No. SES—LIC—20130124—00089, granted Sept. 25, 2012 ("O3b Hawaii License"). 8 See O3b Limited, Call Sign E100088, File No. SES—STA—20140814—00656. ° No changes are being sought to the technical parameters identified in the licenses and STAs held by O3b and its customers. No changes are being made to O3b‘s Schedule S, either, but 03b notes that the number of satellites and phase angles in Section S4 and S5 of Schedule S will vary to the extent that O3b operates one or more in—orbit spare satellites. * Although O3b is not currently seeking a regular license for the Oil Comm Earth Station, O3b is providing a Schedule B containing technical parameters for the Commission‘s ease of reference. 2

e Annex 3: Characteristics of the 1.2m Orbit Antenna are provided for the Commission‘s convenience. O3b previously submitted this information to the Commission." Further, 03b incorporates by reference the following technical parameters previously provided by O3b: * Schedule S. In its application for a gateway earth station in Hawaii, 03b submitted a Schedule S describing its satellite system‘s technical characteristics." The Schedule S correctly described the O3b satellite system for that application, and numerically enveloped all of the necessary parameters for future earth station applications. In order to assist the Commission in processing present and future applications, however, 03b subsequently provided a modified Schedule S that incorporates additional information submitted to the Commission since the Hawaii application was filed.*" O3b will operate its Oil Comm Earth Station within the parameters described in O3b‘s modified Schedule S. e U.S. Government Coordination. O3b has completed all necessary coordination with U.S. government satellite networks operating in Ka—band, including GSO and non—GSO networks, as well as their associated specific earth stations filed under 9.7A and 9.7B of the ITU Radio Regulations through other administrations. O3b has also completed coordination, according to US footnote 334 of the FCC table of frequency allocations, with the U.S. government, and this US334 coordination agreement specifically provides for additional earth stations in U.S. territory operating with O3b‘s satellites, such as the Oil Comm Earth Station. As a result, O3b‘s existing US334 coordination agreement covers the use of the Oil Comm Earth Station as requested in this application. * Antenna Patterns. 03b previously submitted measured 30 GHz band antenna performance data for the 1.2m Orbit antenna to the Commission in the Coda Lab STA request* and the pending DTS STA request.*" Proposed Spectrum Use O3b‘s proposed operations pose no risk of harmful interference to other lawfully authorized stations. As demonstrated below, the Oil Comm Earth Station will provide the requisite protection to geostationary orbit ("GSO") FSS stations operating in the bands proposed by O3b. Transmissions by O3b under the proposed STA will occur on a secondary, non—harmful interference basis, and O3b acknowledges that it will not be entitled to interference protection. *4 See 03b maritime earth station application, File No. SES—LIC—20130528—00455, Technical Attachment at A.6. See also 03b DTS STA Application. * See Hawaii License. * See Maritime Earth Station Answers, Call Sign E130098, File No. SES—AMD—20131025—01138, answer to question 6. 4 See O3b Limited, File No. SES—STA—20131228—01209, filed December 23, 2013 ("O3b CODA STA Application"), and which was placed on Public Notice on April 2, 2014 and granted on April 29, 2014. * See O3b DTS STA Application.

UPLINK 28.35—28.4 GHz —Secondary uplink band shared with primary GSO FSS stations. In the 28.35—28.4 GHz band, there is a primary allocation for GSO FSS systems and a secondary allocation for NGSO FSS systems. O3b‘s Oil Comm Earth Station transmissions in this band will be consistent with their secondary status vis—a—vis GSO FSS transmissions. The Commission has allowed similar secondary use of frequencies in the Ka—band uplink allocated to GSO FSS on a primary basis where applicants are prepared to accept interference from primary operations and can demonstrate that their proposed operations are not likely to cause harmful interference to primary operations."" O3b agrees to both of these standards. As a secondary user of the 28.35—28.4 GHz band in the United States, 03b makes no claim of protection from interference from U.S.—licensed GSO FSS networks in this band segment. Regarding O3b‘s uplink operations in the 28.35—28.4 GHz band, the ITU has developed uplink equivalent power flux density limits ("EPFDyp") limits to protect co—frequency GSO FSS operations from unacceptable interference from NGSO FSS systems operating in the same frequencies. Specifically, in accordance with Article 22 of the ITU Radio Regulations, if the applicable EPFDyp limits are met, the NGSO FSS satellite system is considered to have met its obligations to protect GSO FSS networks from unacceptable interference. 03b demonstrated that its gateway located at Hawaii operating at the authorized power levels will meet the applicable ITU EPFDy, limits in all frequency ranges where these limits apply, due to the inherent angular separation between the 03b and geostationary orbits when viewed from the Earth at latitudes away from the equator."" The Oil Comm Earth Station is located further north in latitude than the Hawaii gateway,"* which results in an even greater angular separation between the O3b and geostationary orbits as viewed from the Earth and an even greater assurance that the applicable ITU EPFD,, limits will be met by O3b‘s proposed operations. The proposed Oil Comm Earth Station operations, therefore, also will meet the applicable ITU EPFDy, limits. In any event, 03b confirms that its operations will be on a secondary basis relative to U.S.—licensed GSO FSS networks in the same band. DOWNLINK 18.3—18.6 GHz — Non—conforming downlink band shared with primary GSO FSS stations. The 18.3—18.6 GHz band is allocated in the United States on a primary basis to GSO FSS. In the 18.3—18.6 GHz downlink band, the ITU has developed downlink equivalent power flux density ("EPFDgown") limits to protect GSO FSS networks from unacceptable interference from NGSO FSS systems operating in the same frequencies. Specifically, in accordance with Article 22 of the ITU Radio Regulations, if the applicable EPFDaown limits are met, the NGSO FSS satellite system is considered to * Northrop Grumman Space & Missions Systems Corporation, 24 FCC Red 2330, at 1« 72—73 (Int‘l Bur. 2009); contactMEO Communications, LLC, 21 FCC Red 4035, at 1« 23—24, (Int‘l Bur., 2006). * O3b Hawaii License Application, FCC File No. SES—LIC—20100723—00952, Technical Attachment at A.10.1. * The O3b Hawaii gateway latitude is 21° 40‘ 17.8" N; the Oil Comm Earth Station latitude is 29° 45"0.14" N. 4

have met its obligations to protect GSO FSS networks from unacceptable interference. O3b confirms that its system will meet the applicable ITU EPFDaown limits in all frequency ranges where these limits apply." As an example of how these limits will be satisfied, O3b provided EPFDaewn calculations for transmissions to its Hawaii gateway earth station."" 03b also showed how the EPFDaown limits can be satisfied at all latitudes.** Compliance with the EPFD«own limits is more easily achieved in the case of transmissions to O3b‘s Oil Comm Earth Station than itis in the case of transmissions to O3b‘s Hawaii earth station. 03b is able to satisfy the limits by taking advantage of the inherent angular separation between the 03b and GSO orbits when viewed from the surface of the Earth at latitudes away from the equator,* and O3b‘s Oil Comm Earth Station will be located further from the equator than O3b‘s Hawaii earth station. The Oil Comm Earth Station location, therefore, presents an even stronger case for non— interference to GSO FSS networks than the Hawaii gateway location. Conclusion The requested STA will allow 03b to evaluate and demonstrate the O3b system‘s operational capabilities and will not result in harmful interference to other authorized spectrum users. Accordingly, and for good cause shown, 03b respectfully requests that its STA be granted in time for it to commence testing under this 30—day STA request on October 24, 2014. See ITU Radio Regulations, Article 22. See also O3b Hawaii License Application, FCC File No. SES—LIC—20100723— 00952, Technical Attachment at A.10.1 for a discussion of O3b‘s compliance with the operational limits in Article 22 of the ITU Radio Regulations. See also Letter from Brian D. Weimer, to Marlene H. Dortch, in re O3b Application for Hawaif Earth Station, File No. SES—LIC—20100723—00952 (Apr. 22, 2011), Annex A. * O3b Hawaii License Application, FCC File No. SES—LIC—20100723—00952, Technical Attachment at A.10.1. * See id. * See id.

ANNEX 1 — Form 312, Schedule B The Form 312, Schedule B is provided on the following pages.

SATELLITE EARTH STATION AUTHORIZATION®S FCC Form 312 — Schedule B:(Technical and Operational Description) Location of Earth Station Site E1: Site Identifier: George R. Brown Convention Center Parking Lot E5. Call Sign: N/A E2: Contact Name: Mike Quiroz E6. Phone Number: 337—332—4347 E3. Street:1300 Chenevert Street E7. City: Houston D ns . . ols E8. County: Harmis E4. State TX E9. Zip Code: 77010 E10. Area of Operation: Fixed E11. Latitude: 29 °45 0.14 " N E12. Longitude: 95 ° 21 ‘37.74 " W E13. Lat/Lon Coordinates are: ONAD—27 ® Nap—g3 E14. Site Elevation (AMSL): 14 meters N/A E15. If the proposed antenna(s) operate in the Fixed Satellite Service (FSS) with geostationary satellites, do(es) the proposed antenna(s) O Yes comply with the antenna gain patterns specified in Section 25.209(a) and (b) as demonstrated by the manufacturer‘s qualification No N/A measurement? If NO, provide a technical analysis showing compliance with two—degree spacing policy. E16. If the proposed antenna(s) do not operate in the Fixed Satellite Service (FSS), or if they operate in the Fixed Satellite Service (FSS) @ Yeq with non—geostationary satellites, do(es) the proposed antenna(s) comply with the antenna gain patterns specified in Section 25.209(a2) and No N/A (b) as demonstrated by the manufacturer‘s qualification measurements? . E17. Is the facility operated by remote control? If YES, provide the location and telephone number of the control point. O Yes ® No E18. Is frequency coordination required? If YES, attach a frequency coordination report as Yes & No E19. Is coordination with another country required? If YES, attach the name of the country(ies) and plot of ¥es &n coordination contours as E20. FAA Notification — (See 47 CFR Part 17 and 47 CFR part 25.113(c)) Where FAA notification is required, have you attached a copy of a completed FCC Form 854 and or the FAA‘s study regarding the potential & & O Yes @ NO hazard of the structure to aviation? FAILURE TO COMPLY WITH 47 CFR PARTS 17 AND 25 WILL RESULT IN THE RETURN OF THIS APPLICATION. _ POINTS OF COMMUNICATION Satellite Name:O3B—A | O3B—A | Eq. NGSO If you selected OTHER, please enter the following: E21. Common Name: E22. ITU Name: E23. Orbit Location: E24. Country: POINTS OF COMMUNICATION (Destination Points) E25. SiteIdentifier:

E26. Conimon Name: E27. Country: ANTENNA Site ID E28. E29. F30. Manufacturer E31. |E32. Antenna E41/42. Antenna Gain Transmit and/or Antenna Id Quantity * Model Size Receive ( dBi at GHz) . . Orbit AL— . Oil Comm |Orbit 1.2m (2 ols 7103—Ka 1.2 45 dBi at 19.2 Convention | Communications 48.0 dBi at 28.3 GHz F23 E35. Above E36. Above £37. Building E38. Total Input| E39. Maximum E40. Total _ * £33/34. Diameter Ground * Height Above Power at Antenna Height EIRP for al _ Antenna . . Sea Level . | 1d Minor/Major(meters) Level (meters) Ground Level antenna flange Above Rooftop carriers (meters) (meters) (Watts) (meters) (dBW) Orbit 1.2m [1.2/1.2 14 _ 16 _ 0.0 20.0 2.0 60.5 FREQUENCY Arllztii.na Fllif:f::.cy ]:31“;152 E46. Antenna £47. Emission E48. Maximum EIRP E49. Maximum EIRP Density 1d Bands(MHz) Mode Polarization(H,V,L,R) Designator per Carrier(dBW) per Carrier(dBW/4kHz) Orbit 1.2m |18300 — 18600 R Left and Right Circular S4MGT7D 45.6 4.3 E50. Various Modulations up to 32APSK; Digital Data Link Orbit 1.2m |28350 — 28400 T Left and Right Circular 54AMGT7D 61.5 21 E50. Various Modulations up to 32APSK;; Digital Data Link FREQUENCY COORDINATION E56. Earth £57. E58. Earth ©59. £54/55. Station Antenna Station Antenna ©28— Antenna 51. Satellite Orbit Type €52/53. Frequency RangtOf Satellite azimuth Ansle Elevation Ansle Azimuth Ansle Elevation Ansle OO Maximum EIRP Density toward the Id rort +yp Limits(MHz) Arc E/W Limit 8 Eastern Eastern S 8 Western 8 Western Horizon(dBW/4kHz) mm Limit Limit Limit Limit Orbit 1.2 [Non—Geostationary (18300 — 18600 |NON—GEO [118.7 10.0 205.5 10 —— Orbit 1.2 (Non—Geostationary (28350 — 28400 |NON—GEO }118.7 10.0 205.5 10 —39.8

REMOTE CONTROL POINT LOCATION E61. Call Sign E65. Phone Number NOTE: Please enter the callsign of the controlling station, not the callsign for which this application is being filed. E62. Street Address E63. City E67. County E64/68. State/Country |E66. Zip Code

ANNEX 2 — Link Budgets Representative link budgets for the 1.2m Orbit antenna at the DTS Earth Station are provided on the following two pages. Please see the chart below for reference. Link Description Carrier MODCOD Table # 1.2m in |P4MHz by 54 MHz |gapgr 2/3rds FWD 1,2 Houston QPSK 2/3rds RTN 10

Link Budget Creator— Re Ground Parameter__ Location Vemon (RHCP), United States Houston, United States Latitude (°) 34.2 29.8 Longitude (East) (*) 260.7 264.6 E/S Range to SV (km) 10824.6 10792.4 E/S Elevation to SV (°) 21.5 21.9 E/S Altitude (km) 0.3 0.0 SV Beam Identifier (#) 14 Minutes Into Pass (Sample #1) (Min) 0:.0 Telco Spot Beam Off—Angle (°) 0.20 Telco Spot Beam Diameter (km) 66.00 Maximum Roundtrip Latenc (msec Modulation Parameters® : Enter Receiver Type DVB—S2 Modem Overhead ' (%) 1.0% Number of Carriers per Channel (#) 1 Available Bandwidth (Hz) 54,000,000 Channel Symbol Rate (sps) 45,000,000 Channel Modulation Type 16APSK Channel FEC Rate— 0.75 Channel Spectral Efficiency (bits/Sym) 3.00 Channel Throughput (100%100 / 100% of Fuli Rate! gbgs) 133,650,000 Uplink ____ _ — ‘Forward E/S Tx Channels perHPA 5 E/S Tx Carrier Frequency 28,709 E/S Tx HPA Power Level 125 E/S Tx OBO ~14.00 E/S Tx Post—HPA Losses —2.24 E/S Tx Antenna Gain (7.3 m / 1.2 m) 65.03 E/S Tx EIRP Per Channel 62.77 E/S Tx Pointing Loss —0.50 E/S Tx RF Link Availability 75.000 E/S Tx Atmospheric Losses ~1.66 E/S Tx Spread ngLoss Satellite_ SV Number of Channelsper HPA (#) SV Rx G/T (dB/K) SV Rx Power Per Tier {dBW) SV Rx Flux Density Per Tier (dBW/m?) SV Tx OBO (ALC / FGM) (dB) SV Tx Post—TWTA Losses (dB) SV Tx Antenna Gain (dBi) SV Tx EIRP Per Channel/Carrier (dBW) SV Tx Pointing Loss (dB) Downlink _ E/S Rx Carrier Frequency (MHz) E/S Rx Wavelength {m) 0.015854 E/S Rx RF Link Availability (%) 70 E/S Rx Atmospheric Losses (dB) ~1.35 E/S Rx Pointing Loss (dB) —1.00 E/S Rx Antenna Gain (1.2 m / 7.3 m) (dBi) 42.7 E/S Rx Effective G/T (dB/K) 18.8 E/S Rx Power Per Channel (dBW) —113.5 E/S Rx F!uxDens:ty Per Channel (dBW/mz) Total Link: E s1 O __ Carrier / Nmse Bandwrdth Carrier / Noise Uplink Carrier / Noise Downlink Carrier / Intermodulation Im (C/Iim) (dB) (C/N) — Total Actual (dB) (C/N) — Total Required (dB) (Ep/N,) — Total Actual (dB) (Ep/N,) — Total Requured E \ssM . #2 11

SsUPPLEMENT 03b Limited ("O3b") hereby supplements its request for special temporary authority ("STA") to demonstrate compliance with the Commission‘s RF radiation requirements. 03b is attaching to this supplement a radiation hazard study for the 1.2—m antenna O3b will operate pursuant to the STA. As appropriate, 03b will use fencing, signage, and other measures to limit access to the relevant area. Procedures will be in place requiring that transmit power be turned off before work on the 1.2—m antenna is performed.

Radiation Hazard Study — Orbit AL—7103—Ka, 1.20 m Antenna Radiation Hazard Study The study in this section analyzes the potential RF human exposure levels caused by the Electro Magnetic (EM) fields of an Orbit AL—7103—Ka, 1.20 m antenna, operating with a maximum power at the flange of 20 Watts. The mathematical analysis performed below complies with the methods described in the FCC Office of Engineering and Technology (OET) Bulletin No. 65 (1985 rev. 1997) R&O 96—3 26 in "Evaluating Compliance with FCC Guideliness for Human Exposure to RF EM Fields, OET Bulletin 65 (Edition 97—01), Supplement B, FCC Office of Engineering & Technology, November 1997". Maximum Permissible Exposure There are two separate levels of exposure limits. The first applies to persons in the general population who are in an uncontrolled environment. The second applies to trained personnel in a controlled environment. According to 47 C.F.R. § 1.1310, the Maximum Permissible Exposure (MPE) limits for frequencies above 1.5 GHz are as follows: * General Population / Uncontrolled Exposure: 1.0 mW/cm* * Occupational / Controlled Exposure: 5.0 mW/icm* > The purpose of this study is to determine the power flux density levels for the earth station under study as compared with the MPE limits. This comparison is done in each of the following regions: 1. Far—field region 2. Near—field region 3. Transition region 4. The region between the feed and the antenna surface 5. The main reflector region 6. The region between the antenna edge and the ground Input Parameters The following input parameters were used in the calculations: Input Parameter Value Unit Symbol Antenna Diameter 1120 | m D Antenna Transmit Gain 48.50 dBi G Transmit Frequency 29100.0 _MHz f Antenna Feed Flange Diam. 6.00 cm d Power Input to the Antenna 20.00 Watts P Calculated Parameters The following values were calculated using the above input parameters and the corresponding formula: Page — 1 of 4

Radiation Hazard Study — Orbit AL—7103—Ka, 1.20 m Antenna Calculated Parameter Value Unit Symbol Formula Antenna Surface Area 1.13 m A TD*/4 Area of Antenna Flange 28.3 cm* a Td*/4 Antenna Efficiency 0.53 real n g\*/(mD") Gain Factor 70795 real q 10*(G/10) Wavelength 0.010 m A 300/f Behavior of EM Fields as a Function of Distance The behavior of the characteristics of EM fields varies depending on the distance from the radiating antenna. These characteristics are analyzed in three primary regions: the near—field region, the far—field region and the transition region. Of interest also are the region between the antenna main reflector and the subreflector, the region of the main reflector area and the region between the main reflector and ground. Region of 3 Main Reflector C Region between Main Reflector & Subreflector Region between Main Reflector & Ground 1W Figure 1. Electro—Magnetic Fields as a Function of Distance For parabolic aperture antennas with circular cross sections, such as the antenna under study, the near—field, far—field and transition region distances are calculated as follows: Page — 2 of 4

Radiation Hazard Study — Orbit AL—7103—Ka, 1.20 m Antenna Calculated Parameter Value Unit Symbol Formula Near—Field Distance 34.92 m Rnf D*/(4A) Distance to Far—Field 83.81 m Rff 0.6D%/A Distance of Transition Region 34.92 m Rt Rt=Rnf The distance in the transition region is between the near and far fields. Thus, Rnf < Rts< Rff . However, the power density in the transition region will not exceed the power density in the near—field. Therefore, for purposes of the present analysis, the distance of the transition region can equate the distance to the near—field. Power Flux Density Calculations The power flux density is considered to be at a maximum through the entire length of the ._ near—field. This region is contained within a cylindrical volume with a diameter, D, equal to the diameter of the antenna. In the transition region and the far—field, the power density decreases inversely with the square of the distance. The following equations are used to calculate power density in these regions: Calculated Parameter Value Unit Symbol Formula Power Density in the Near—Field 3.74 _|mWi/icm*| __Snf 16nP/(nD*) Power Density in the Far—Field 1.60 mW/icm*| __Sff |gP/(4nRff) Power Density in the Transition Region 3.74 _|mW/icm* St Snf*Rnf/Rt The region between the main reflector and the subreflector is confined to within a conical shape defined by the feed assembly. The most common feed assemblies are waveguide flanges. This energy is determined as follows: Calculated Parameter Value Unit Symbol Formula Power Density at the Feed Flange | 2829.4 |mW/icm*| Sfa 4P/a The power density in the main reflector is determined similarly to the power density at the feed flange; except that the area of the reflector is used. Calculated Parameter Value Unit Symbol Formula Power Density at Main Reflector | __7.07 mW/em? Ssurface| 4P/A The power density between the reflector and ground, assuming uniform illumination of the reflector surface, is calculated as follows: Calculated Parameter Value Unit Symbol Formula Power Density between Reflector & Gnd | 1.77 _|mW/cm*| Sg P/A Page — 3 of 4

Radiation Hazard Study — Orbit AL—7103—Ka, 1.20 m Antenna Summary of Calculations Table 1 below summarizes the calculated power flux density values for each region. In a controlled environment, the only regions that exceed FCC limitations are the regions between the main reflector and the sub—reflector as well as the main reflector region. These regions are only accessible by trained technicians who, as a matter of procedure, turn off transmit power before performing any work in these areas. Table 1. Power Flux Density for Each Region: Calculated Parameter Unit Exposure Limit Exposure Limit Uncontrolled Controlled Power Densities mW/cm* Environment Environment $1 mW/icm* s 5 mW/cm* Far Field Calculation 1.60 Exceeds limitations Satisfies FCC MPE Near Field Calculation 3.74 Exceeds limitations Satisfies FCC MPE Transition Region 3.74 Exceeds limitations Satisfies FCC MPE Region between Main & Subreflector 2829.4 Exceeds limitations Exceeds limitations Main Reflector Region 7.07 Exceeds limitations Exceeds limitations Region between Main Reflector & Gnd 1.17 Exceeds limitations Satisfies FCC MPE In conclusion, the results show that the antenna, in a controlled environment, and under the proper mitigation procedures, meets the guidelines specified in § 1.1310 of the Regulations. Page — 4 of 4


Document Created: 2014-11-04 17:28:28
Document Modified: 2014-11-04 17:28:28
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