Attachment SUPPLEMENT

This document pretains to SES-MOD-20030512-00639 for Modification on a Satellite Earth Station filing.

IBFS_SESMOD2003051200639_324736

1330 Connecticut Avenue, NW STEPTOE & JOHNSON ur Washington, DC 20036—1795 Telephone 202.429.3000 ATTORNEYS AT LAW sZ&'I.,?.'iZ 202.429.3902 www.steptoe.com Philip L. Malet 202.429.6239 pmalet@steptoe.com VIA HAND DELIVERY June 30, 2003 RECEiVE| ECEIVvEp Ms. Marlene H. Dortch JUN 3 o 2003 Secretary FEERAL 0o ' Federal Communications Commission afg;s?'éfi”r’?????%?fgwgg@% 445 12"" Street, SW — Room TW—A325 Washington, D.C. 20554 Re: The Boeing Company‘s Application to Modify Transmit/Receive Authorization Call Sign £000723; File No. SES—MOD—20030512—00639 Dear Ms. Dortch: The Boeing Company hereby submits for association with the above—referenced application additional clarifying information that may be useful in evaluating the application. If you have any questions concerning this submission, please do not hesitate to contact the undersigned. Respectfully submitted, Philip L.%Ialet f — Carlos M. Nalda Counselfor The Boeing Company Attachment cce (w/ att.): Howard Griboff WASHINGTON PHOENIX LOS ANGELES LONDON BRUSSELS

Supplemental Technical Information The Boeing Company ("Boeing") hereby submits the following information which clarifies certain portions of its application to modify the blanket transmit—receive aircraft earth station authorization (Call Sign EO0O0723) to add a new reflector antenna and make certain other changes. Specifically, Boeing notes the following: 1. At pages 9—10 of the Technical Appendix (Exhibit 1) to the Application, Boeing supplied four figures (Figures 6 thru 9) which depict the measured antenna transmit gain patterns for the azimuth and elevation planes for the new reflector antenna at 14.2 GHz. Attachment 1 hereto shows additional details of these antenna patterns at 14.0 GHz, 14.2 GHz and 14.4 GHz. As indicated in these antenna patterns, the first sidelobe will be at least 6.7 dB below the mainbeam gain of the new reflector antenna; At page 12 of the Technical Appendix, Boeing supplied a "typical" link budget (Figure 11) for the return uplink of the new reflector antenna on a single aircraft assuming "a nominal 1024 kbps data signal" spread to 32.4 MHz. This link budget assumes, among other parameters, ITU Rain Region "E", an elevation angle of 45 degrees, transmit EIRP of 44.6 dBW, and a satellite gain of 30 dB. While the maximum throughput of the system for multiple aircraft operations may be greater than the nominal data rate indicated in the typical link budget without exceeding the off—axis EIRP density limits established by the FCC‘s Rules, at the present time the system cannot support two aircraft platforms having this "typical" link budget and operating over the same transponder spreading bandwidth in the United States. Therefore, multiple aircraft operations over the same transponder spreading bandwidth in the United States within the off—axis EIRP density limits established by the FCC‘s Rules may require operations at reduced data rates, which in turn would result in lower transmit EIRP values in this link budget calculation for each aircraft platform; At pages 35—36 of the original transmit—receive application (File No. SES—LIC— 20001204—02300), Boeing supplied figures (Figures 6.1—1 and 6.1—2) depicting an example of multiple aircraft aggregation for the 99.99 % probability envelope of the phased array antenna when accounting for mis—pointing, power control and antenna pattern variations. Attachment 2 hereto replicates these figures and compares them with the results achieved for the new reflector antenna. In both . cases, the aggregate off—axis emissions are below the EIRP density limits established by the FCC‘s Rules at all points along the GSO arc.

Attachment 1 Normalized Gain (dB) — i 1|fi + i 1 )4 /\ 2. i i AC DulZ 2 220 Fouca h 1 _ SeMSbr4oPOAz Detail | _ ~10 —8 —2 0 2 Off—Axis Angle (degrees) Fig. 1. Azimuth Plane Transmit Pattern 14.0 GHz (Detail) Normalized Gain (dB) 130 10 Off—Axis Angle (degrees) Fig. 2. Elevation Plane Transmit Pattern 14.0 GHz (Detail)

Normalized Gain (dB) ag w LNCV 1 1 ceereboepeai . 1.( 1/ [/ —10 —8 —6 —4 —2 0 2 4 6 8 10 OffAxis Angle (degrees) Fig. 3. Azimuth Plane Transmit Pattern 14.2 GHz (Detail) Normalized Gain (dB) B7 [dbnmfmfmmfanee3 -30, L ; | . ; i 1 . ; : i l i0g BBMSb142IOE! Detail : 1 i ; ; 1 ; : ; 1 1 i 1 1os ; : 1 : ; 1 i 10 —8 —6 —4 —2 0 2 4 6 8 10 OffAxis Angle (degrees) Fig. 4. Elevation Plane Transmit Pattern 14.2 GHz (Detail)

Normalized Gain (dB) so Ni [ _ _ | covebteaborebawi | _ —10 —4 —2 0 2 OffAxis Angle (degrees) Fig. 10. Azimuth Plane Transmit Pattern 14.4 GHz (Detail) Normalized Gain (dB) leplll 12 1 1 . | gomatefoet bewi | _ . [ . 1 . ; . [ . _ ~10 —8 —6 —4 —2 0 2 4 6 8 10 Off—Axis Angle (degrees) Fig. 12. Elevation Plane Transmit Pattern 14.4 GHz (Detail)

Attachment 2 Example of Multiple Aircraft Aggregation con Phased Array Reflector Mc r snn gronssnoooominnoponoorntnn uons on n ns 1~~> Offaxis Limit : 1 z:1 Aircmil 99.99% Probabilty Envelopes .: ao? 1 u 223 +43 —133 423 13 403 43 43 J3 410 $3 43 + Replicates Figure 6.1—1 from initial application + Off—axis limits from 25.209 and 25.134 + Shows 99.99% probability envelopes when accounting for mis—pointing, power control, and antenna pattern variation + Off—axis limits met at all points along the GSO arc Example of Multiple Aircraft Aggregation (Detail) conne Phased Array Reflector i —— Offaxis Link i =—.—!—~——| —— Aircraf 99.99% Probability Envelopes |. .l ———.— 4 + Replicates Figure 6.1—2 from initial application + Detail of previous figure + Shows 99.99% probability envelopes when accounting for mis—pointing, power control, and antenna pattern variation * Off—axis limits met at all points along the GSO arc


Document Created: 2003-07-10 09:21:50
Document Modified: 2003-07-10 09:21:50
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