PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/20-10:42:50
G01     48.0           23.7                4.7 +/-    0.93       9.4 +/-    0.93  0.040 / 0.060
G06     178.9          26.1                5.9 +/-    1.76      11.2 +/-    1.76  0.040 / 0.080
G11     43.9           11.6                2.9 +/-    1.32       7.9 +/-    1.32  0.070 / 0.210
G13     249.7          28.8                7.0 +/-    3.20      12.5 +/-    3.20  0.090 / 0.180
G15     281.5          15.4                5.2 +/-    2.53      12.9 +/-    2.53  0.200 / 0.280
G17     338.3          77.1                6.5 +/-    0.64       6.7 +/-    0.64  0.160 / 0.330
G19     253.5          64.0                5.9 +/-    0.80       6.5 +/-    0.80  0.020 / 0.030
G28     57.3           51.4                5.3 +/-    0.96       6.5 +/-    0.96  0.020 / 0.030
G30     150.8          39.0                8.5 +/-    1.21      12.5 +/-    1.21  0.080 / 0.160