PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/26-14:13:00
G01     90.3           31.8                7.3 +/-    0.54      12.3 +/-    0.54  0.030 / 0.030
G07     125.4          45.6                7.4 +/-    0.88      10.0 +/-    0.88  0.030 / 0.030
G11     68.0           39.4                5.7 +/-    0.26       8.4 +/-    0.26  0.100 / 0.120
G13     294.5          36.1                7.1 +/-    1.47      11.0 +/-    1.47  0.100 / 0.130
G17     214.3          53.8                9.2 +/-    0.98      11.1 +/-    0.98  0.040 / 0.060
G18     63.5           23.7                5.7 +/-    0.80      11.4 +/-    0.80  0.050 / 0.050
G19     214.8          24.1                9.2 +/-    1.88      18.4 +/-    1.88  0.040 / 0.080
G28     348.5          61.8                4.2 +/-    0.68       4.7 +/-    0.68  0.050 / 0.080
G30     101.2          77.2                6.9 +/-    0.75       7.1 +/-    0.75  0.040 / 0.060