PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/18-07:27:50
G01     89.3           30.8                5.4 +/-    0.64       9.2 +/-    0.64  0.030 / 0.040
G07     124.4          45.5                7.0 +/-    1.19       9.4 +/-    1.19  0.030 / 0.050
G11     71.5           42.6                5.1 +/-    0.46       7.2 +/-    0.46  0.050 / 0.080
G13     294.7          37.0                4.9 +/-    0.56       7.5 +/-    0.56  0.040 / 0.070
G17     212.5          51.5                7.0 +/-    0.80       8.7 +/-    0.80  0.040 / 0.080
G19     212.9          28.3                4.6 +/-    1.92       8.3 +/-    1.92  0.050 / 0.090
G28     330.0          60.8                4.1 +/-    1.09       4.6 +/-    1.09  0.080 / 0.110
G30     93.1           79.5                5.3 +/-    0.92       5.4 +/-    0.92  0.090 / 0.120