Inter-instrument calibration using magnetic field data from Flux Gate Magnetometer (FGM) and Electron Drift Instrument (EDI) onboard Cluster - Nakamura, R; Plaschke, F; Teubenbacher, R; Giner, L; Baumjohann, W; Magnes, W; Steller, M; Torbert, RB; Vaith, H; Chutter, M; Fornacon, K-H; Glassmeier, K-H; et al. (GEOSCIENTIFIC INSTRUMENTATION METHODS AND DATA SYSTEMS, 2013)