Radio Occultation Data Buy Processing Status and Evaluation

Under the National Oceanic and Atmospheric Administration (NOAA) Commercial Data Program (CDP) Radio Occultation Data Buy (RODB) program, the COSMIC Data Analysis and Archive Center (CDAAC) system processes observation data into higher level neutral atmosphere and ionosphere products in near real-time for operational and science users. In this presentation we focus on activities over the past year processing data provided by Spire Global and PlanetIQ. We summarize the processing system, data product volumes and geographic and local time distributions. Neutral atmosphere bending angle profile quality is evaluated by way of comparisons to global numerical weather prediction models, collocations with COSMIC-2 profiles, and uncertainty estimates obtained from the 3-cornered hat method. We assess electron density profiles (EDPs) via comparison to ionosondes and characterize total electron content (TEC) distributions. We also update on the recent addition of BeiDou Global Navigation Satellite System data to the RODB and compare with GPS, GLONASS, and Galileo.