PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/12-12:42:50
G02     219.1          59.9                6.5 +/-    1.09       7.4 +/-    1.09  0.070 / 0.070
G06     51.6           71.5                4.3 +/-    0.35       4.5 +/-    0.35  0.050 / 0.090
G12     319.8          40.4                4.2 +/-    0.91       6.1 +/-    0.91  0.050 / 0.070
G17     60.7           28.9                2.8 +/-    1.13       5.1 +/-    1.13  0.040 / 0.070
G19     37.9           50.5                2.8 +/-    0.67       3.5 +/-    0.67  0.040 / 0.030
G24     257.5          41.3                6.8 +/-    1.26       9.7 +/-    1.26  0.040 / 0.030
G28     124.0          12.7                5.2 +/-    2.84      13.5 +/-    2.84  0.050 / 0.050