Retrievals of Water Vapour around PMCs from Odin-SMR
Christensen, Ole Martin; Eriksson, Patrick
Chalmers University of Technology, SWEDEN

Odin-SMR is a microwave limb sounder on board the Odin satellite, which was launched February 2001. It measures thermal emission from water vapour at 486-581\,GHz and has provided global maps of water vapour. One of the measured lines is the strong 557 GHz line which allows for retrieval of water vapour up to altitudes of 110\,km. During 2010 and 2011 dedicated measurements of water vapour in the summers mesopause was made by SMR in order to study the formation of Polar Mesospheric Clouds (PMCs). To achieve the best possible spacial resolution, the measurements were performed using short scans, and tomographic retrievals of water vapour was performed. These retrievals constitutes the first tomographic retrievals from Odin-SMR. This study presents this dataset and evaluates its usefulness for the studying PMCs.