This is a Request for Information (RFI) only for planning purposes and is not a solicitation for bids or proposals. The purpose is to obtain services for modernizing and modifying the Very Long Baseline Interferometry (VLBI) Correlator System to implement a state-of-the-art, software-based capability for near real-time operations and high-performance data processing. Responses are requested by a to-be-determined date at 1:00pm EST, to be submitted via email to the specified government point of contact. The RFI asks responders to address their capability, similar experience, and company information. No budget, performance location, or specific submission deadline is provided.