1. U.S. Naval Research Laboratory,Washington,DC,United States of America,20375
2. University of California Berkeley,Space Sciences Laboratory,Berkeley,California,United States of America,94720
3. University of Michigan,Ann Arbor,Michigan,United States of America,48104
4. University of California San Diego,Center for Astrophysics and Space Sciences,La Jolla,California,United States of America,92093
5. George Mason University,Resident at the U.S. Naval Research Laboratory,Washington,DC,United States of America,20375