PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-08:12:40
G01     230.2          20.7                4.1 +/-   17.97       8.8 +/-   17.97  0.040 / 0.050
G03     298.9          63.6               -0.1 +/-    6.39      -0.1 +/-    6.39  0.040 / 0.060
G14     80.9           29.4                1.5 +/-    8.65       2.7 +/-    8.65  0.050 / 0.090
G16     147.8          41.3                6.2 +/-    5.57       8.9 +/-    5.57  0.040 / 0.080
G18     206.5          10.5                6.4 +/-    6.01      17.7 +/-    6.01  0.080 / 0.180
G22     228.8          73.9                4.4 +/-    3.59       4.6 +/-    3.59  0.080 / 0.170
G23     304.2          34.8                2.9 +/-    5.30       4.6 +/-    5.30  0.090 / 0.150
G26     102.9          52.5                6.5 +/-    6.49       8.0 +/-    6.49  0.080 / 0.160
G31     44.1           34.5               -0.4 +/-    7.13      -0.7 +/-    7.13  0.070 / 0.130