PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-15:12:40
G01     96.8           29.7                9.1 +/-    0.97      16.1 +/-    0.97  0.050 / 0.140
G07     120.0          47.0                8.9 +/-    0.86      11.7 +/-    0.86  0.060 / 0.130
G08     41.8           10.8                7.8 +/-    2.39      21.3 +/-    2.39  0.040 / 0.030
G11     73.8           39.1                8.0 +/-    1.48      11.9 +/-    1.48  0.050 / 0.020
G13     302.9          32.3                7.4 +/-    1.72      12.4 +/-    1.72  0.050 / 0.040
G17     209.9          49.9                8.0 +/-    0.52      10.0 +/-    0.52  0.050 / 0.030
G19     211.8          23.2               10.3 +/-    1.93      21.0 +/-    1.93  0.070 / 0.090
G28     336.8          61.6                7.2 +/-    0.54       8.0 +/-    0.54  0.080 / 0.100
G30     61.0           80.2                7.5 +/-    1.02       7.6 +/-    1.02  0.040 / 0.050