Fig. 2
From: Impact and mitigation of space weather effects on GNSS receiver performance
Location of the G2 receivers in the Fugro network whose data was analysed for the peak of the solar burst (12:50–13:20 UT) on 24 September 2011. Nightside of the Earth is shown in grey shading. a Filled coloured circles indicate reduction in the L-band SNR; b filled coloured circles indicate the missing number of tracked GPS + GLONASS satellites (at L1 and L2) by the receiver; c filled coloured circles indicate maximum horizontal position error