PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/12-04:12:40
G01     68.9           32.7                3.4 +/-    1.63       5.7 +/-    1.63  0.030 / 0.040
G07     138.3          29.4                6.2 +/-    1.86      11.0 +/-    1.86  0.030 / 0.040
G11     53.6           30.6                3.7 +/-    1.90       6.4 +/-    1.90  0.030 / 0.030
G13     273.7          36.9                5.4 +/-    2.84       8.3 +/-    2.84  0.030 / 0.020
G15     300.5          16.1                2.3 +/-    1.63       5.5 +/-    1.63  0.050 / 0.070
G17     236.9          70.4                5.6 +/-    0.56       5.9 +/-    0.56  0.050 / 0.080
G19     225.6          44.5                6.4 +/-    2.30       8.7 +/-    2.30  0.100 / 0.200
G28     23.7           58.6                3.2 +/-    2.58       3.7 +/-    2.58  0.090 / 0.250
G30     136.6          57.2                5.3 +/-    0.49       6.1 +/-    0.49  0.050 / 0.080