National Academy Asks FCC to Block Aeronautical 4.9 GHz Use
The National Academy of Sciences’ Committee on Radio Frequencies asked the FCC to not allow aeronautical use of the 4.9 GHz band. “An aeronautical service transmitting down to Earth is the worst-case scenario in regard to potential interference problems for…
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Radio Astronomy Service observatories,” said a filing posted Friday in docket 07-100. Observations in the band are “extremely useful in studying the brightness distributions of objects such as ionized hydrogen clouds surrounding young stars; remnants of supernovae, which mark the cataclysmic end of stars; and ejecta traveling at nearly the speed of light from black holes in the nuclei of galaxies,” the committee said. Grandfather in existing public safety licensees, asked the New York State Division of Homeland Security and Emergency Services: “Public safety use of the 4.9 GHz band is widespread and crucial in New York state.”