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SCS Could Destroy Radio Astronomy: Observatory

Supplemental coverage from space activities could make radio astronomy impossible from 600 MHz to 2700 MHz and beyond, the National Radio Astronomy Observatory said Tuesday in FCC docket 22-271. NRAO said strong beam coupling or high passband occupation by SCS…

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will destroy or permanently impair a radio astronomy receiver, though this could be mitigated. It said large swaths of spectrum where terrestrial interference has been coordinated away or otherwise obviated will be blocked by bands allocated to SCS. SCS emissions would block even protected bands, NRAO said, noting SCS undermines the protections the National Radio Quiet Zone and other remote locations enjoy today. Accordingly, it said the FCC should make SCS applicants show they can operate without directly illuminating, incapacitating or damaging radio astronomy observatory receivers. NRAO also urged cumulative limits on SCS interference.