This is a market research request to identify potential sources capable of repairing the APS-133 Radar Modulator for a Weather Radar System. The government does not own the technical data for repair and finds it uneconomical to acquire, and Ontic is identified as the known sole-source repair contractor. The contractor will be fully responsible for furnishing all materials, equipment, and services, including maintenance and calibration at their own or a subcontractor's facility. The government clarifies this is for planning purposes only and does not intend to award a contract based on this request, nor will it reimburse participants for any expenses. Performance of services would occur at the contractor's or subcontractor's facility.