Fig. 1From: GPS and in situ Swarm observations of the equatorial plasma density irregularities in the topside ionosphereTemporal difference between SWA/SWB satellites from August 2014 till January 2016: a LT coverage during the considered seasons and LT satellite separation, b progressive time shift in hours between satellites. Minutes are indicated in decimal format. Months are marked by the first letter of their names. Gray shadows indicate a post-sunset interval of 18–06 LT, when equatorial plasma irregularities often occurBack to article page