McBride, BrentSmith, Rachel E.Greenberg, AndrewDixon, ScottMuller, Jan-PeterMartins, J. Vanderlei2025-01-082025-01-082024-11-20McBride, Brent A., Rachel E. Smith, Andrew Greenberg, Scott Dixon, Jan-Peter Muller, and J. Vanderlei Martins. “OreSat 0.5: Next-Generation Small Satellite for Global Cirrus Cloud Detection and Mapping.” In Sensors, Systems, and Next-Generation Satellites XXVIII, 13192:25–32. SPIE, 2024. https://doi.org/10.1117/12.3034013.https://doi.org/10.1117/12.3034013http://hdl.handle.net/11603/37258Proceedings Volume 13192, Sensors, Systems, and Next-Generation Satellites XXVIII, 16-20 September 2024, Edinburgh, United KingdomThe OreSat 0.5 is a novel small satellite developed in collaboration between Portland State University in Portland, Oregon, USA, the University of Maryland, Baltimore County, in Baltimore, MD, USA, and the Mullard Space Science Laboratory at University College London, Surrey, UK. OreSat 0.5 will demonstrate global cirrus cloud detection and mapping from a compact, low-cost platform. In this work, we preview the OreSat 0.5 mission and demonstrate the calibration and science behind its primary payload, the Cirrus Flux Camera (CFC). The CFC is a three-channel shortwave infrared radiometer (870, 1390, 1590 nm bands). Flux ratios between its three bands will be used to differentiate ice versus water and noncloud signals. Along-track and Across-track pointing up to ±45° will allow retrievals of heights and winds of the cirrus cloud tops. We discuss a preliminary pre-launch calibration of CFC and plans to expand upon and maintain this calibration vicariously on-orbit and through proxy sources. OreSat 0.5 launched to space on August 16 2024 and first light data is expected by Q4 2024.8 pagesen-US©2024 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.UMBC Earth and Space InstituteText