PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-21:27:40
G02     199.8          18.7               15.9 +/-    2.40      36.1 +/-    2.40  0.240 / 0.180
G06     171.0          51.5               14.4 +/-    0.77      17.8 +/-    0.77  0.190 / 0.370
G13     229.4          14.9               16.3 +/-    1.31      40.7 +/-    1.31  0.070 / 0.150
G17     12.7           64.4               12.4 +/-    0.58      13.5 +/-    0.58  0.070 / 0.130
G19     308.7          70.9               12.0 +/-    0.65      12.7 +/-    0.65  0.040 / 0.050
G24     311.7          27.8               11.3 +/-    1.95      20.7 +/-    1.95  0.040 / 0.050
G28     85.1           41.1               12.8 +/-    1.30      18.3 +/-    1.30  0.060 / 0.080
G30     156.5          16.4               15.0 +/-    2.40      36.0 +/-    2.40  0.050 / 0.070