Locations of various space and ground instruments. The upper panels show the locations of GOES 13 and 15 (black curve), THE (blue curve) and THD (red curve) spacecraft in (a) the X-Y plane and (b) the X-Z plane in Solar Magnetic coordinates from 20:00 UT on 24 January 2016 to 02:00 UT on 25 January 2016. The lower panel (c) shows the locations of ionospheric footprints of GOES 13 and 15 (black diamonds), THE (blue asterisk) and THD (red asterisk), ground magnetometers (black dots), and SuperDARN radar FOV and camping beams of PGR (cyan), SAS (green), and KAP (orange) in AACGM coordinates at 23:00 UT on 24 January 2016.