Until the launch of COSMIC in April 2006, there had been little GPS-RO data available for performing forecast impact studies. The major source had been the German CHAMP satellite (above), which has delivered 150-200 profiles per day globally since mid-2000. Nonetheless, some evaluations were attempted. A European team (Healy and Thépaut, 2006) added a mere 80 GPS profiles to a data set that included hundreds of thousands of standard satellite and ground measurements and 20,000 AIRS profiles, every 12 hours. The minuscule GPS data set boosted the total information content of the data by 4%, on top of a 10% increase provided by the AIRS data. On a per-profile basis, that's roughly 100 times the information content from GPSRO than from any previous remote sensing masurement.