The Department of Homeland Security has issued a Request for Information on sensors capable of detecting and localizing positioning, navigation and timing (PNT) interference, whether intentional or unintentional, with intent to cause harm or to disrupt routine operations of the 18 critical infrastructure and key resource sectors. Intentional interference is described as deliberate attempts to jam, meacon or spoof GPS receivers. Information collected from the survey will help establish a common framework from which to plan for enterprise PNT Interference Detection and Mitigation (IDM) solutions that the DHS will develop and field in the future. As part of this architecture development the DHS Geospatial Management Office has identified the need for a centralized space-based PNT IDM service that leverages existing federal infrastructure. Sol. No. HSHQDC-10-Q-00048. Respond by Jan. 21. Contact: Andrew Cole, contracting officer, 202-447-5586, [email protected].