PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-02:43:00
G01     43.5           19.4                3.5 +/-    2.43       7.9 +/-    2.43  0.040 / 0.060
G06     177.5          33.1                6.6 +/-    2.52      10.9 +/-    2.52  0.050 / 0.050
G13     242.1          24.7                5.5 +/-    0.92      10.8 +/-    0.92  0.070 / 0.090
G15     273.9          13.8                3.2 +/-    1.66       8.2 +/-    1.66  0.070 / 0.090
G17     346.1          74.2                5.7 +/-    0.33       5.9 +/-    0.33  0.020 / 0.020
G19     267.0          67.2                5.0 +/-    0.73       5.4 +/-    0.73  0.020 / 0.020
G24     318.0          15.2                1.7 +/-    3.29       4.2 +/-    3.29  0.130 / 0.310
G28     66.8           48.4                5.5 +/-    1.46       7.0 +/-    1.46  0.110 / 0.160
G30     152.2          27.7                7.1 +/-    1.59      13.1 +/-    1.59  0.270 / 0.230