I haven't been paying attention to the WISP market, so I'm not up to speed on these issues. https://www.fcc.gov/document/fcc-proposes-fines-against-wisps-and-issues-war... The Federal Communications Commission’s Enforcement Bureau today announced proposed fines and issued a formal industry warning related to devices that apparently caused interference to the Federal Aviation Administration’s terminal doppler weather radar station in San Juan, Puerto Rico. The Enforcement Bureau proposed three separate $25,000 fines against wireless Internet service providers Boom Solutions, Integra Wireless, and WinPR. [...] In addition to the proposed fines, the Bureau’s Enforcement Advisory warned operators, manufacturers, and marketers of Unlicensed National Information Infrastructure devices that these devices must be certified under FCC rules. Such devices that operate in the 5.25 GHz to 5.35 GHz and 5.47 GHz to 5.725 GHz bands risk interfering with radar systems if not properly configured to share the spectrum [...]