NASA's National Aeronautics and Space Administration (NASA) is seeking to procure a 280mm inner diameter integrating sphere, which is crucial for the calibration of spectrometers at the Goddard Space Flight Center (GSFC). The primary objective of this procurement is to facilitate the transfer of NIST-traceable calibrations to an uncalibrated spectroradiometer, utilizing the sphere as a monochromatic source in conjunction with a multi-wavelength laser system. This specialized equipment is essential for ensuring precise scientific measurements and adherence to stringent calibration standards in technical fields. Interested organizations must submit their capabilities and qualifications in writing to Katheryn Thomas at katheryn.a.thomas@nasa.gov by 11:59 a.m. Eastern Standard Time on September 19, 2024, to be considered for this sole source contract, which is anticipated to be awarded to Gigahertz-Optik.