This is a Sources Sought/Request for Information (RFI) issued for market research and planning purposes only, seeking highly mobile, production-ready commercial solutions to modernize Ground Control Approach and Precision Approach Radar systems for the Brazilian Air Force and potentially other Foreign Military Sales partners. The government is interested in systems that meet specific threshold and objective capabilities for surveillance, precision landing, communications, reliability, maintainability, and transportability, including rapid setup and KC-390 aircraft transport. Respondents are asked to provide company status, relevant experience, training and sustainment experience, past performance, and cost and delivery schedule estimates for their proposed solutions. Responses are voluntary and submitted at the respondent's own expense, and the information may be used to develop an acquisition strategy or a future solicitation, though no commitment to issue one is implied.