1. IMSG at NOAA Center for Satellite Applications and Research; College Park; Maryland USA
2. National Environmental Satellite, Data, and Information Service, NOAA; Silver Spring Maryland USA
3. Science and Technology Corporation; Hampton Virginia USA
4. Department of Earth and Planetary Sciences; Harvard University; Cambridge Massachusetts USA
5. State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing Applications; Chinese Academy of Sciences; Beijing China
6. NOAA/ESRL, Global Monitoring Division; Boulder Colorado USA