47 CFR 87.479 - Harmful interference to radionavigation land stations.

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There is 1 rule appearing in the Federal Register for 47 CFR 87. View below or at eCFR (GPOAccess)
§ 87.479 Harmful interference to radionavigation land stations.
(a) Military or other Government stations have been authorized to establish wide-band systems using frequency-hopping spread spectrum techniques in the 960-1215 MHz band. Authorization for a Joint Tactical Information Distribution Systems (JTIDS) has been permitted on the basis of non-interference to the established aeronautical radionavigation service in this band. In order to accommodate the requirements for the system within the band, restrictions are imposed. Transmissions will be automatically prevented if:
(1) The frequency-hopping mode fails to distribute the JTIDS spectrum uniformly across the band;
(2) The radiated pulse varies from the specified width of 6.4 microseconds ±5%;
(3) The energy radiated within ±7 MHz of 1030 and 1090 MHz exceeds a level of 60 dB below the peak of the JTIDS spectrum as measured in a 300 kHz bandwidth. The JTIDS will be prohibited from transmitting if the time slot duty factor exceeds a 20 percent duty factor for any single user and a 40 percent composite duty factor for all JTIDS emitters in a geographic area.
(b) If radionavigation systems operating in the 960-1215 MHz band experience interference or unexplained loss of equipment performance, the situation must be reported immediately to the nearest office of the FAA, the National Telecommunications and Information Administration, Washington, DC 20504, or the nearest Federal Communications Commission field office. The following information must be provided to the extent available:
(1) Name, call sign and category of station experiencing the interference;
(2) Date and time of occurrence;
(3) Geographical location at time of occurrence;
(4) Frequency interfered with;
(5) Nature of interference; and
(6) Other particulars.

Title 47 published on 2013-10-01

The following are only the Rules published in the Federal Register after the published date of Title 47.

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  • 2013-10-03; vol. 78 # 192 - Thursday, October 3, 2013
    1. 78 FR 61203 - Aviation Services
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      Final rule.
      Effective November 4, 2013. The incorporation by reference of certain publications listed in the rule is approved by the Director of the Federal Register as of November 4, 2013.
      47 CFR Part 87

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United States Code

Title 47 published on 2013-10-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 47 CFR 87 after this date.

  • 2014-03-17; vol. 79 # 51 - Monday, March 17, 2014
    1. 79 FR 14634 - Expanding Access to Mobile Wireless Services Onboard Aircraft
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      Proposed rule; extension of comment period.
      The reply comment period for the proposed rule published January 15, 2014 (79 FR 2615), is extended. Submit reply comments on or before May 16, 2014.
      47 CFR parts 22, 24, 27, 87 and 90