Figure 9From: Polarization analysis of VLF/ELF waves observed at subauroral latitudes during the VLF-CHAIN campaign Polarization angle and mean value variation with time for simultaneously observed chorus. Spatial movement with time of the ionospheric exit point for three simultaneously observed chorus emissions detected during three contiguous days at ATH and FVM. (a) 18 February 2012. (b) 19 February 2012. (c) 20 February 2012.Back to article page