06.22.2004 12:00 AM
International Bureau Clarifies Space Station Interference Analysis Requirements
The FCC International Bureau Satellite Division released a Public Notice regarding Clarification of 47 C.F.R. § 25.140(b)(2) - Space Station Application Interference Analysis. The Public Notice explains "Section 25.140(b)(2) states that each applicant must provide an interference analysis demonstrating the compatibility of its proposed system two degrees from any authorized space station," and notes that historically, applicants have submitted interference analyses based on other authorized or proposed systems or based on the technical data of the applicant's own satellite where there are no licensed or proposed satellite within two degrees of its proposed orbital location.

The FCC clarified that "the interference analysis required by Section 25.140(b)(2) must demonstrate the proposed satellite's two degree compatibility with currently authorized stations. Where there are no currently authorized stations within two degrees of the applicant's proposed station, the applicant must demonstrate the compatibility of its system with a proposed station at an assumed two-degree separation. In situations where there are no authorized or proposed stations within two degrees of the applicant's requested orbit location, the applicant must submit an interference analysis, with an assumed two degree separation, using either: (1) the technical characteristics of authorized or proposed satellites located more than two degrees away that meet U.S. two-degree compliance rules; or (2) the technical characteristics of the applicant's own satellite."

Applicants were warned, "Any geostationary satellite orbit space station applications for operation in any FSS frequency band received after the date of this public notice that do not contain an interference analysis meeting the requirements specified in the December 3 Public Notice and this Public Notice will be dismissed as defective."

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