§ 27.1321   Requirements for operation of base and fixed stations in the 600
MHz downlink band in close proximity to Radio Astronomy Observatories.

   (a) Licensees must make reasonable efforts to protect the radio
   astronomy observatory at Green Bank, WV, Arecibo, PR, and those
   identified in § 15.712(h)(3) of this chapter as part of the Very Long
   Baseline Array (VLBA) from interference.

   (b) 600 MHz band base and fixed stations in the 600 MHz downlink band
   within 25 kilometers of VLBA observatories are subject to coordination
   with the National Science Foundation (NSF) prior to commencing
   operations. The appropriate NSF contact point to initiate coordination
   is Electromagnetic Spectrum Manager, NSF, 4201 Wilson Blvd., Suite
   1045, Arlington, VA 22203, fax 703-292-9034, email esm@nsf.gov.

   (c) Any licensee that intends to operate base and fixed stations in the
   600 MHz downlink band in locations near the Radio Astronomy Observatory
   site located in Green Bank, Pocahontas County, West Virginia, or near
   the Arecibo Observatory in Puerto Rico, must comply with the provisions
   in § 1.924 of this chapter.

   [ 79 FR 48538 , Aug. 15, 2014. Redesignated at  81 FR 4975 , Jan. 29, 2016]

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