Massachusetts Institute of technology [Cambridge] (MIT)
EISCAT Scientific Association ; EISCAT Scientific Association
Space Physics Division ; Rutherford Appleton Laboratory
University of Colorado at Boulder ; University of Colorado
Institute for Ionosphere ; Institute for Ionosphere
Institute for Solar-Terrestrial Physics ; Institute for Solar-Terrestrial Physics
Electrical and Computer Eng. Dept. ; Miami University
Radio Observatorio de Jicamarca ; Radio Observatorio de Jicamarca