Satellite sensor calibration and validation efforts have been integral components of ESSIC’s research and development activities, supporting a range of satellite instruments, including those operated by NASA and NOAA. These efforts play a crucial role in monitoring and understanding changes in the Earth’s environment, enhancing weather forecasting capabilities, tracking climate trends, and providing valuable data for sustainable resource management and disaster mitigation strategies.The ESSIC Satellite Cal/Val affinity group serves as a platform to bring together scientists and researchers specializing in satellite sensor calibration and validation, fostering collaboration among individuals who may not regularly have the opportunity to work together. Our group convenes regularly, offering a space for sharing scientific progress through both formal and informal discussions. Additionally, this affinity group facilitates enhanced interactions and interdisciplinary engagement among members across various fields. Collaboration, interaction, knowledge sharing, and fostering interdisciplinary engagement are the core principles guiding our group’s activities.