Attachment letter

letter

LETTER submitted by IB, FCC

letter

2008-04-21

This document pretains to SAT-MOD-20070924-00130 for Modification on a Satellite Space Stations filing.

IBFS_SATMOD2007092400130_636240

Federal Communications Commission Washington, D.C. 20554 April 2 1, 2008 James M. Talens, Esq. Counsel for ATCONTACT Communications, Inc. 60 17 Woodley Road McLean, VA 22 10 1 Re: ATCONTACT Communications, LLC SAT-MOD-20070924-00 130 (Call Sign: S2680) Dear Mr. Talens: This letter refers to the above-referenced application filed by ATCONTACT Communications, LLC (ATCONTACT). In the application, ATCONTACT proposes to add the following frequencies to its current authorization at the 83" W.L. orbital location: 18.3-18.8 GHz, 19.7-20.2 GHz, 28.35-28.6 GHz and 29.25-30.0 GHz. Section 25.140(b) of the Commission's rules requires ATCONTACT to demonstrate that its proposed operations at the 83" W.L. orbital location are compatible with the Commission's two-degree spacing environment. ATCONTACT provides this analysis using the SES Americom AMC-16 satellite, which is operating at the 85" W.L. orbital location. To assist the Commission in processing this application, ATCONTACT should amend its application to include information responding to the following: 1) In Table 12, explain why the calculations are based on ATCONTACT's proposed satellite operating at 89" W.L. and an SES Americom satellite (AMC-16) at 87" W.L., when ATCONTACT proposes to operate at 83" W.L. and AMC-16 is operating at 85" W.L; 2) In Tables 11 and 12, state why the satellite transmit EIRP density values are different; 3) In Tables 11 and 12, state why the earth station receive system noise temperature values are different; 4) In Tables 11 and 12, state why the earth station transmit EIRP density values are different; 5) After making corrections to Tables 11 and 12, state whether the I,, IJN,, and uplinWdownlink degradation values, when recalculated in Table 12, still offer the '47 C.F.R. tj 25.140(b)(2). See also Public Notice, International Bureau, Satellite Division Information: Clarification of 47 C.F. R. tj 25.140(b)(2), Space Station Application Interference Analysis, 19 FCC Rcd 10652 (Int'l Bur. 2004).

positive link margin needed to prove successful operation can occur in a two- degree environment. In amending this application, please take the appropriate steps to assure that the application is accurate and complete. ATCONTACT’S response must be filed with the Commission’s Secretary within 15 days of the date of this letter, with a courtesy copy to Kal Krautkramer of my staff. Please contact Kal at (202) 418-1335 if you have any questions. Sincerely, Robert G. Nelson Chief, Satellite Division International Bureau cc: Mr. David M. Drucker Manager, ATCONTACT Communications, LLC 2


Document Created: 2008-04-21 15:54:34
Document Modified: 2008-04-21 15:54:34
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