PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-20:43:00
G01     87.3           32.4               14.0 +/-    0.52      23.4 +/-    0.52  0.090 / 0.340
G07     127.7          43.9               15.8 +/-    0.68      21.6 +/-    0.68  0.140 / 0.410
G11     67.4           39.8               11.7 +/-    0.46      17.1 +/-    0.46  0.070 / 0.100
G13     292.1          36.5               12.9 +/-    0.75      20.0 +/-    0.75  0.060 / 0.100
G15     313.6          11.1                4.6 +/-   23.73      12.4 +/-   23.73  0.040 / 0.070
G17     217.1          51.4               17.2 +/-    1.95      21.3 +/-    1.95  0.040 / 0.060
G18     61.8           23.6               11.3 +/-    0.94      22.8 +/-    0.94  0.050 / 0.090
G19     215.9          28.4               18.2 +/-    0.93      33.0 +/-    0.93  0.050 / 0.080
G28     354.7          61.5               13.9 +/-    1.14      15.6 +/-    1.14  0.050 / 0.060
G30     113.5          72.6               14.9 +/-    0.73      15.5 +/-    0.73  0.060 / 0.050