PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-02:12:50
G01     108.7          24.7                3.6 +/-    0.85       7.1 +/-    0.85  0.040 / 0.040
G07     104.1          59.5                4.4 +/-    0.47       5.0 +/-    0.47  0.040 / 0.040
G08     42.3           22.8                2.2 +/-    1.30       4.6 +/-    1.30  0.050 / 0.070
G09     175.8          16.0                6.7 +/-    0.84      16.4 +/-    0.84  0.060 / 0.070
G11     93.8           42.8                5.0 +/-    0.30       7.0 +/-    0.30  0.030 / 0.030
G13     311.5          26.7                2.6 +/-    1.68       4.9 +/-    1.68  0.030 / 0.040
G17     205.4          35.8                3.8 +/-    1.56       6.0 +/-    1.56  0.060 / 0.130
G19     208.6          12.1                5.4 +/-    3.75      14.5 +/-    3.75  0.080 / 0.130
G28     316.1          60.9                2.9 +/-    0.67       3.3 +/-    0.67  0.160 / 0.170
G30     33.7           77.6                3.3 +/-    0.84       3.4 +/-    0.84  0.160 / 0.220