Special Notice: COMMERCE, DEPARTMENT OF, NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, is intending to negotiate a sole source contract with Peak Design Ltd. for the procurement of four HSR1 Hyperspectral Radiometers. These radiometers are used by the NOAA Global Monitoring Laboratory (GML) for measuring Aerosol Optical Depth (AOD) and spectrally resolved solar radiation at the Earth's surface. The HSR1 radiometers are compact, easily portable, and designed for automatic unattended operation with low power requirements. They do not require external solar trackers, shading bands, or moving parts. Peak Design Ltd. is the sole provider of this instrument that meets all the requirements of the NOAA GML. The radiometers have been successfully tested in comparative evaluations and are compatible with existing systems. The delivery date for these instruments is 9/30/2024 to Boulder, CO. This notice is not a request for competitive proposals, but firms that believe they can meet the government's requirements may submit documentation within 15 days after publication of this synopsis for evaluation.