1. High Altitude ObservatoryNational Center for Atmospheric Research Boulder Colorado USA
2. COSMIC Program OfficeUniversity Corporation for Atmospheric Research Boulder Colorado USA
3. Haystack ObservatoryMassachusetts Institute of Technology Westford Massachusetts USA
4. Space Department, Applied Physics LaboratoryJohns Hopkins University Laurel Maryland USA
5. Air Force Research LaboratoryKirtland AFB Albuquerque New Mexico USA