Fig. 1From: Comparison of three retrievals of COSMIC GPS radio occultation results in the tropical upper troposphere and lower stratosphereNumber of COSMIC GPS-RO profiles retrieved by atmPrf2010 (red), atmPrf2013 (green) and rishfsi2013 (blue) in 180°E–180°W and 10°S–10°N from October 1, 2011, to March 31, 2012. Tick marks on the horizontal axis indicate the first day of the corresponding monthBack to article page