PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/25-14:13:00
G01     92.6           31.2                7.2 +/-    1.08      12.3 +/-    1.08  0.020 / 0.020
G07     123.6          47.3                8.0 +/-    0.65      10.4 +/-    0.65  0.020 / 0.020
G11     70.3           40.1                6.7 +/-    1.12       9.7 +/-    1.12  0.040 / 0.050
G13     296.7          35.5                7.2 +/-    3.19      11.4 +/-    3.19  0.040 / 0.040
G17     212.9          51.9                7.9 +/-    0.72       9.8 +/-    0.72  0.100 / 0.120
G18     65.5           24.0                6.9 +/-    1.75      13.8 +/-    1.75  0.080 / 0.120
G19     214.0          22.4                6.4 +/-    1.42      13.3 +/-    1.42  0.100 / 0.100
G28     344.7          61.8                6.2 +/-    0.77       6.9 +/-    0.77  0.090 / 0.080
G30     93.1           78.4                6.6 +/-    0.51       6.7 +/-    0.51  0.060 / 0.120