The Department of Commerce, specifically the National Oceanic and Atmospheric Administration (NOAA), is seeking qualified U.S. businesses to provide Kipp & Zonen pyranometers and accessories, particularly the CMP21 and CMP22 models, as part of its initiative to enhance the Surface Radiation Budget Network (SURFRAD) and portable radiation systems. The procurement aims to replace aging instrumentation to ensure consistent and accurate solar radiation data collection, which is vital for climate modeling, renewable energy studies, and environmental monitoring. These high-quality pyranometers are essential for measuring solar irradiance and must meet specific performance standards outlined in ISO 9060:2018, ensuring reliability in various environmental conditions. Interested firms are required to submit their capabilities and relevant documentation by April 28, 2025, to Isabel Vigil at isabel.vigil@noaa.gov, with delivery of the instruments expected by July 1, 2025.