PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/15-12:42:40
G02     205.1          36.5                4.1 +/-    1.64       6.3 +/-    1.64  0.060 / 0.160
G06     147.9          73.3                4.8 +/-    0.98       5.0 +/-    0.98  0.070 / 0.210
G12     309.2          18.9                4.3 +/-    2.61       9.8 +/-    2.61  0.070 / 0.100
G17     37.3           48.1                3.8 +/-    0.60       4.9 +/-    0.60  0.080 / 0.090
G19     12.6           61.9                5.0 +/-    0.82       5.6 +/-    0.82  0.030 / 0.050
G24     294.4          38.7                4.1 +/-    1.82       6.1 +/-    1.82  0.050 / 0.050
G28     102.5          34.9                4.3 +/-    0.96       6.9 +/-    0.96  0.120 / 0.190