high-quality data products along with additional products as a direct result of instrument upgrades and science improvements. The JPSS-2 and the Polar Follow-On (PFO) satellites (JPSS-3, JPSS-4) will continue to host similar instrument complements for consistent long-term science products. The JPSS program also supplements these datasets with long-term agreements with the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT), the Japan Aerospace Exploration Agency (JAXA), and other international agencies to provide increased temporal and spatial coverages and types of satellite products. The JPSS constellation of polar-orbiting satellites provides a diverse set of ultraviolet (UV), visible and near infrared (VIS/NIR), infrared (IR), and microwave (MW) sensors, as well as essential observations for many important applications for operational weather forecasting, environmental monitoring, and climate research. The JPSS program at the center for SaTellite Applications and Research (JSTAR) led the development and calibration/validation (Cal/Val) of JPSS science algorithms to generate a vast number of products [2], which are operationally available to NOAA stakeholders and users worldwide through NOAA Product Distribution and Access (PDA), Comprehensive Large Array-data Stewardship System (CLASS, [3]), and Direct Broadcast (DB), respectively. JSTAR includes a large team of scientists and engineers from government, academia, and industry. Details on the JPSS algorithms, performance, team leads and members, and data product access are available at the JSTAR website [4]. The S-NPP products served as a gateway to introduce algorithm upgrades and mitigations during the pre-launch phase of NOAA-20. As a result of the lessons learned through S-NPP product operationalization, and based on pre-launch characterization of the NOAA-20 instruments, the JSTAR teams developed necessary algorithm upgrades and mitigations to ensure NOAA-20 data product readiness. The JSTAR teams also developed the NOAA-20 Cal/Val plans for use during the Early Orbit Checkout (EOC), Intensive Cal/Val (ICV) and Long-Term Monitoring (LTM) phases for the NOAA-20 data products. The Integrated Calibration and Validation System (ICVS) and the Long-Term Monitoring System (LTM) developed for S-NPP have been augmented on NOAA-20 for spacecraft/sensor health and satellite product display/monitoring. The JSTAR teams are currently focusing on NOAA-20 data product Cal/Val and performance evaluation. The generation and dissemination of the NOAA-20 satellite products follow the same protocols as the S-NPP. One of the major strengths of polar-orbiting satellites is the collection of global observations needed for the Numerical Weather Prediction (NWP) assimilation worldwide. CrIS and ATMS observations are assimilated into NWP models on a routine basis and have been found to improve 5-7 day forecasts and hurricane track predictions [1]. In fact, 85% of all data assimilated into forecast models are from infrared and microwave sounders on polar orbiting satellites contributing to about 60% of forecast error reduction [5; 6]. The availability of two down-link stations (Svalbard and McMurdo) for NOAA-20 coupled with the implementation of Community Satellite Processing Packages (CSPP, [7]) implemented at the DB network of stations enables improved latency for many real-time applications [8]. The S-NPP and NOAA-20 satellite data products have been proven to be invaluable over the data-sparse polar regions [9]. To complement these data products, the JPSS Program Science Office has established the Proving Ground and Risk Reduction (PGRR) Program [10] initiatives to address data needs for near-real-time (NRT) applications and retrospective evaluations across NOAA line offices and other user agencies. The JSTAR teams have developed plans for an enterprise algorithms approach for S-NPP and NOAA-20, as well as future mission data processing.