PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/17-01:58:00
G03     298.1          63.8                1.9 +/-    0.91       2.1 +/-    0.91  0.030 / 0.030
G14     82.6           26.9                3.5 +/-    1.06       6.5 +/-    1.06  0.040 / 0.040
G16     148.7          41.2                5.9 +/-    0.71       8.4 +/-    0.71  0.090 / 0.180
G22     233.0          73.5                4.2 +/-    0.75       4.3 +/-    0.75  0.120 / 0.190
G23     303.3          33.0                4.7 +/-    1.02       7.7 +/-    1.02  0.060 / 0.130
G26     105.2          53.1                5.0 +/-    0.86       6.1 +/-    0.86  0.060 / 0.130
G31     43.7           36.5                2.2 +/-    1.19       3.5 +/-    1.19  0.060 / 0.080