Plasmaspheric drainage plumes: Simultaneous remote sensing and in-situ observations plus the ionospheric footprints H. Vo (1), H. Laakso (2), E. Pryse (1), C. Bridgeman (1), B. Sandel (3), M. Hernandez-Pajares (4) (1) University of Wales Aberystwyth (2) ESA/ESTEC (3) University of Arizona (4) Technical University of Catalonia Our current understanding of the plasmasphere has been revived with the global perspective provided by the IMAGE EUV imager. Truly simultaneous in situ obervations of the plasmaspheric drainage plumes are obtained by the electric field experiments from the Polar and Cluster satellites which provide density profiles across the plasmapause. For instance, detached plasma as seen from Cluster is seen as IMAGE EUV as plumes thus constraints can be put on the EUV image and help to resolve the plasmaspheric forms. Global GPS VTEC provides a mean to study the footprint of the drainage plumes in the ionosphere to understand how plasmaspheric feature can be linked to ionospheric forms. _______________ Presented at the 35th COSPAR Scientific Assembly, Paris, France, July 18-25, 2004.