PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-03:57:50
G01     44.2           20.2                3.5 +/-    2.99       7.7 +/-    2.99  0.040 / 0.060
G06     178.5          31.0                5.6 +/-    1.80       9.6 +/-    1.80  0.030 / 0.040
G11     43.8           9.9                 2.5 +/-    2.85       7.0 +/-    2.85  0.170 / 0.140
G13     243.4          25.5                5.2 +/-    1.38      10.0 +/-    1.38  0.110 / 0.170
G15     275.0          14.2                2.1 +/-    0.62       5.3 +/-    0.62  0.120 / 0.290
G17     345.5          74.6                4.9 +/-    0.32       5.1 +/-    0.32  0.190 / 0.260
G19     264.4          66.7                4.6 +/-    0.88       5.0 +/-    0.88  0.020 / 0.020
G24     318.3          14.0               -0.0 +/-    1.64      -0.1 +/-    1.64  0.020 / 0.020
G28     65.2           48.9                3.8 +/-    0.53       4.8 +/-    0.53  0.090 / 0.210
G30     151.9          29.5                7.4 +/-    1.64      13.1 +/-    1.64  0.110 / 0.170