1. 1Code 971, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
2. Code 910, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
3. Code 972, NASA GSFC/Wallops Flight Facility, Wallops Island, VA 23337, USA
4. Department of Mathematical Sciences, University of Alberta, Edmonton T6G 2G1, Canada
5. Engineering Sciences, Mail Stop 104–44, California Institute of Technology, Pasadena, CA 91125, USA
6. Institute of Oceanography, National Taiwan University, N0. 1, Sec. 4, Roosevelt Road, Taipei POB 23‐13, Tainwan 106, Republic of China