Latitude and local time dependence of ULF wave power at the magnetopause:: A Cluster-Double Star study - Cornilleau-Wehrlin,N; Grison,B; Attie,D; Belmont,G; Rezeau,L; Robert,P; Alleyne,HSC; Yearby,K; Lucek,E; Carr,C (JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2008)