PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/12-12:27:50
G02     201.7          28.8                5.6 +/-    1.55      10.1 +/-    1.55  0.070 / 0.130
G06     169.4          61.7                5.5 +/-    0.80       6.1 +/-    0.80  0.070 / 0.140
G12     304.5          10.5               -7.9 +/-    9.79     -21.7 +/-    9.79  0.040 / 0.100
G17     33.3           51.5                2.1 +/-    0.40       2.6 +/-    0.40  0.050 / 0.120
G19     353.7          67.6                2.2 +/-    0.82       2.4 +/-    0.82  0.030 / 0.040
G24     305.0          33.9                2.0 +/-    1.90       3.3 +/-    1.90  0.030 / 0.040
G28     97.6           34.2                3.4 +/-    0.75       5.5 +/-    0.75  0.100 / 0.000