Attachment letter

letter

LETTER submitted by FCC, IB, SATELLITE, SA

Letter

2003-04-25

This document pretains to SES-LIC-20021028-01926 for License on a Satellite Earth Station filing.

IBFS_SESLIC2002102801926_330980

FEDERAL COMMUNICATIONS COMMISSION 445 TWELFTH STREET SW WASHINGTON DC 20554 INTERNATIONAL BUREAU PROCESSING ENGINEER: HSlNG LIU SATELLITE RADIOCOMMUNICATIONS TELEPHONE: (202) 418-0759 SATELLITE ENGINEERING BRANCH FACSIMILE: (202) 418-0748 HOME PAGE: WWW.FCC.GOV/IB MAIL STOP: 7-A431 APPLICATION STATUS: (202) 418-2222 E-MAIL ADDRESS: HLIU@FCC.GOV April 25,2003 Robert J. Miller, Esq. Gardere Wynne Sewell LLP 1601 Elm Street, Suite 3000 Dallas, TX 75201 Re: Call Sign: E020303 File No. SES-LIC-20021028-01926 Schlumberger Omnes, Inc. (“SOI”) Dear Counsel: We have under consideration the above-captioned license application filed on behalf of SOI. For the reason stated below, we require SO1 to submit additional information. I In this application, SO1 seeks blanket authorization for 300 Ku-band VSAT Earth Stations on Vessel (ESV) with antennas mounted on river barges traveling along the United States Inland Waterway systems. As barges traveling in water, the onboard antenna mounts can be inherently unstable. There are concerns on antenna pointing errors which to the satellite it desires to communicate and to the neighboring satellites it may adversely interfere. SO1 attempted to address this issue in its application. However, the paragraph was too brief and lacked detailed explanation. Therefore, we ask SO1 to submit additional information in the following for further review: 1) Describe, with functional block diagram and schematic, the operation of “carrier detect”, “transmit mute”, “de-activate’’ and “re-activate”. List the operation criteria and specifications. Describe if additional stability control devices are equipped (e.g. gyro antenna platform); 2) Describe if any multiple access (MA) scheme and/or random access (RA) protocol to be used in the VSAT network. If so, explain how the traffic and power loading are regulated in compliance with the FCC Rules; 3) Submit antenna gain pattern plots as specified in CFR47 Sect. 25.209 for the receive and transmit antennas; 4) Submit field test report to demonstrate the proposed operation will not cause spectral interferences to other satellite communications. Further action on the subject application will be withheld for a period of k t y days from the date of this letter to provide SO1 an opportunity to respond. Failure to respond within this time period will result in the dismissal of the application pursuant to 47 CFR 425.1 12(c). Please note that any amendment must be submitted to the Office of the Secretary in triplicate and signed in the same manner as the original application. Sincerely, Hsing Liu Electronics Engineer


Document Created: 2003-08-26 16:36:08
Document Modified: 2003-08-26 16:36:08
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