PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-17:42:50
G07     329.8          56.7               11.2 +/-    0.93      13.1 +/-    0.93  0.030 / 0.070
G08     107.6          52.0               13.3 +/-    0.43      16.4 +/-    0.43  0.030 / 0.050
G09     196.2          75.7               12.2 +/-    1.03      12.5 +/-    1.03  0.050 / 0.100
G11     148.0          11.7               14.5 +/-    2.37      38.9 +/-    2.37  0.050 / 0.120
G23     153.3          38.5               14.2 +/-    0.54      21.2 +/-    0.54  0.030 / 0.050
G27     56.2           32.2               10.7 +/-    0.72      17.8 +/-    0.72  0.040 / 0.060
G28     236.2          28.6               12.6 +/-    2.21      22.7 +/-    2.21  0.140 / 0.400
G30     301.6          35.3               11.0 +/-    0.79      17.4 +/-    0.79  0.110 / 0.410