*Note: This dataset version has been superseded by a newer version. It is highly recommended that users access the current version. Users should only use this version for special cases, such as reproducing studies that used this version.* This Fundamental Climate Data Record (CDR) contains radio occulation (RO) calibrated brightness temperatures from the Advanced Microwave Sounding Unit-A (AMSU-A) channel 9 measurements at 57.3 GHz from 2001 to 2010 on a 2.5 degree grid. The RO satellites measure the bending angle of GPS signals as they pass through the atmosphere. Temperature profiles are derived from these GPS bending angles from the COSMIC and CHAMP data from 2001 to 2010. Version 2010.2640 of the RO mission data from the UCAR COSMIC Data Analysis and Archival Center (CDAAC) were used for the calibration. Data are partitioned into monthly anomalies, where each month contains measurements from NOAA-15, 16, 17, 18, 19, NASA AQUA and Metop-A. A climatology file for 2001 to 2010 complements the anomaly files.