PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/23-04:58:00
G01     223.4          15.7                7.0 +/-    2.07      17.2 +/-    2.07  0.100 / 0.210
G03     284.1          68.6                6.5 +/-    0.97       6.9 +/-    0.97  0.130 / 0.220
G14     86.9           24.6                4.9 +/-    1.22       9.7 +/-    1.22  0.090 / 0.170
G16     143.3          46.5                7.0 +/-    0.76       9.2 +/-    0.76  0.090 / 0.180
G22     216.7          69.3                5.6 +/-    0.72       6.0 +/-    0.72  0.040 / 0.040
G23     310.4          41.1                6.1 +/-    1.29       8.6 +/-    1.29  0.030 / 0.060
G26     93.7           54.2                6.2 +/-    0.60       7.5 +/-    0.60  0.040 / 0.090
G31     46.6           29.1                1.8 +/-    0.92       3.3 +/-    0.92  0.040 / 0.070