PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-14:28:00
G01     40.2           14.9                6.1 +/-    3.07      15.2 +/-    3.07  0.070 / 0.120
G06     172.2          43.2                9.5 +/-    0.96      13.2 +/-    0.96  0.070 / 0.130
G13     235.6          20.7                8.1 +/-    3.28      17.6 +/-    3.28  0.110 / 0.170
G15     272.7          11.1                6.1 +/-    1.46      16.6 +/-    1.46  0.140 / 0.160
G17     9.1            67.9                8.8 +/-    0.36       9.5 +/-    0.36  0.250 / 0.420
G19     275.5          67.1                9.4 +/-    0.65      10.1 +/-    0.65  0.130 / 0.370
G24     315.2          22.4                6.2 +/-    1.43      12.8 +/-    1.43  0.170 / 0.380
G28     73.9           46.0                7.8 +/-    0.54      10.4 +/-    0.54  0.120 / 0.360
G30     155.7          27.1                8.4 +/-    0.73      15.6 +/-    0.73  0.070 / 0.060