PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/12-12:28:00
G01     45.6           21.8                3.9 +/-    2.23       8.2 +/-    2.23  0.060 / 0.070
G06     175.5          32.1                6.6 +/-    1.21      11.1 +/-    1.21  0.050 / 0.070
G13     244.1          27.0                7.0 +/-    1.70      13.1 +/-    1.70  0.120 / 0.130
G15     283.6          13.2                3.0 +/-    1.86       7.9 +/-    1.86  0.230 / 0.250
G17     346.7          75.3                5.4 +/-    0.55       5.5 +/-    0.55  0.070 / 0.190
G19     253.1          59.8                6.2 +/-    0.78       7.1 +/-    0.78  0.060 / 0.130
G24     317.8          15.1                1.7 +/-    2.34       4.2 +/-    2.34  0.040 / 0.050
G28     60.2           51.0                4.9 +/-    0.62       6.0 +/-    0.62  0.050 / 0.050
G30     152.7          36.8                6.2 +/-    0.90       9.6 +/-    0.90  0.220 / 0.280