Introduction Radio occultation uses observed radio wave bending angles from global navigation satellite systems (including GPS and GLONASS) to derive atmospheric properties. The resulting derived profiles provide a high-accuracy, high vertical resolution, limited footprint, product featuring atmospheric variables such as dry temperature and refractivity. For more detailed information please refer to https://www.cosmic.ucar.edu/what-we-do/gnss-radio-occultation This gridded, monthly mean dataset is constructed through merging 13 radio occultation (RO) profile datasets provided by the COSMIC Data Analysis and Archive Center (CDAAC) and subsequently gridding into a monthly 5°x10° product. All valid (non-bad flagged) profiles from each mission were incorporated with the exception of COSMIC-2 data, which was bound to profiles within the 30 S - 30 N latitude window due to discrepancies found at higher latitudes. All tropopause calculations were carried out independently from CDAAC calculations and were derived directly from the profile data. Specifications Included datasets: Name Date Range Profile Count CHAMP 2002/03/01-2008/10/05 404,558 COSMIC 2006/04/22-2020/04/25 5,788,267 COSMIC-2 2019/10/01-2025/05/31 8,106,885 GRACE 2007/02/28-2017/11/30 428,668 KOMPSAT-5 2015/01/22-2025/05/31 614,590 MetOp-A 2007/10/01-2021/11/27 2,875,424 MetOp-B 2013/02/01-2025/05/31 2,198,720 MetOp-C 2019/07/14-2025/05/30 804,099 PAZ 2018/05/10-2025/05/31 267,172 SAC-C 2006/03/09-2011/08/03 348,812 Spire 2020/12/16-2025/05/31 3,874,933 TamDEM-X 2016/01/01-2025/05/31 292,896 TerraSAR-X 2008/02/10-2025/05/31 868,648 Gridded Resolution: 5° Latitude, 10° Longitude, 200 m Vertical for Dry Temperature 5° Latitude Zonal Mean, 200 m Vertical for Bending Angle and Refractivity 5° Latitude, 10° Longitude for tropopause parameters Variables included: Dry Temperature, (Temp), 10 – 40 km Bending Angle, (Bend_ang), 0 – 60 km Refractivity, (Ref), 0 – 60 km Tropopause Parameters Cold Point Temperature (cpt) (for latitudes 30 N - 30 S) Lapse Rate Tropopause (lapse_rate) Potential Temperature Gradient Tropopause (ptgt) Data Timeframe: March 2002 – May 2025