Affiliation history for 0000-0001-6952-7343

The table below gives the affiliation history of the author based on the affiliations assigned to the author's articles.

Start	End	Country	Affiliation
2002	Present	US	NASA Goddard
2002	2002	France	Observatoire de Paris
2002	2002	US	Naval Research Laboratory
1999	2002	US	NASA Goddard
1999	1999	US	Space Applications Corporation.
1999	1999	Finland	Space Research Laboratory, Department of Physics, Turku University, FIN-20014, Finland
1998	1998	US	Space Applications Corp, 22180, Vienna, VA, U.S.A.
1997	1998	US	NASA Goddard