On August 27, 2026, the Federal Communications Commission's Wireless Telecommunications Bureau and Office of Engineering and Technology issued Public Notice DA 26-901 approving additional Environmental Sensing Capability (ESC) sensor deployment and coverage plans for Key Bridge Wireless, LLC in the 3.5 GHz band. The approval covers Dynamic Protection Areas (DPAs) Alaska 28 through 37 and authorizes the operator to deploy the approved sensor configurations and coverage consistent with its June 22, 2026 filing. Before providing commercial service for a DPA, Key Bridge Wireless must file a notification in GN Docket No. 15-319 confirming that the approved sensors are constructed and operational and identifying the approved Spectrum Access Systems (SASs) with which the ESC is communicating. The Public Notice also modifies the procedural route for future ESC Sensor Registrations and supplements: ESC operators must file them through the FCC's Electronic Comment Filing System (ECFS), with filings referring to GN Docket No. 15-319. The modified filing requirements supersede the earlier procedures. The action supports protection of Department of War radar systems while enabling CBRS operations in the approved areas.

Impact

Impact assessment: Medium. Key reasons: the notice approves specific ESC configurations and changes the filing procedure for future ESC registrations, but it is limited to ESC operators and 3.5 GHz spectrum-sharing operations rather than a broad equipment authorization change.

Who is affected?

ESC operators, SAS administrators, CBRS stakeholders and entities deploying 3.5 GHz systems in or near the covered DPAs.

Conclusion:

affected operators should use ECFS for future ESC registrations and supplements and ensure required pre-service notifications are filed for each applicable DPA.