PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/17-12:43:10
G01     89.8           31.9                4.9 +/-    0.96       8.2 +/-    0.96  0.030 / 0.030
G07     125.8          45.1                5.9 +/-    0.55       8.0 +/-    0.55  0.020 / 0.020
G11     67.0           38.8                5.0 +/-    1.39       7.4 +/-    1.39  0.040 / 0.050
G13     293.9          36.4                3.6 +/-    2.14       5.6 +/-    2.14  0.050 / 0.030
G17     214.3          55.4                6.2 +/-    0.67       7.4 +/-    0.67  0.080 / 0.100
G18     62.8           23.5                4.7 +/-    1.27       9.6 +/-    1.27  0.100 / 0.100
G19     215.0          24.0                5.6 +/-    3.16      11.2 +/-    3.16  0.090 / 0.110
G28     349.2          61.7                4.1 +/-    0.49       4.6 +/-    0.49  0.090 / 0.120
G30     101.6          77.5                5.3 +/-    0.38       5.5 +/-    0.38  0.050 / 0.120