1. Department of Atmospheric Sciences University of Washington Seattle Washington USA
2. Robert Tardif, Vaisala Inc. Louisville Colorado USA
3. Cooperative Institute for Climate, Ocean and Ecosystem Studies University of Washington Seattle Washington USA
4. Antarctic Meteorological Research Center, Space Science and Engineering Center University of Wisconsin–Madison Madison Wisconsin USA
5. Department of Physical Sciences School of Engineering, Sciences, and Mathematics, Madison Area Technical College Madison Wisconsin USA
6. National Center for Atmospheric Research Boulder Colorado USA