PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-06:12:40
G01     72.6           33.1                4.3 +/-    0.83       7.1 +/-    0.83  0.040 / 0.050
G07     136.5          31.9                9.1 +/-    0.74      15.3 +/-    0.74  0.030 / 0.040
G11     55.3           31.8                4.1 +/-    0.55       6.9 +/-    0.55  0.040 / 0.070
G13     278.1          37.1                6.1 +/-    1.13       9.3 +/-    1.13  0.050 / 0.090
G15     303.5          15.4                1.8 +/-    1.88       4.4 +/-    1.88  0.090 / 0.340
G17     231.4          68.7                5.0 +/-    0.88       5.3 +/-    0.88  0.080 / 0.300
G19     223.2          41.9                6.9 +/-    0.84       9.8 +/-    0.84  0.030 / 0.040
G28     18.1           59.3                3.7 +/-    0.31       4.2 +/-    0.31  0.030 / 0.030
G30     133.3          61.7                7.2 +/-    0.90       8.1 +/-    0.90  0.040 / 0.080