PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-14:43:10
G01     97.0           29.6                7.5 +/-    1.00      13.2 +/-    1.00  0.040 / 0.050
G07     119.8          47.4                9.0 +/-    1.07      11.7 +/-    1.07  0.040 / 0.050
G08     41.8           10.9                6.9 +/-    1.63      18.9 +/-    1.63  0.060 / 0.140
G11     74.1           39.3                8.5 +/-    1.35      12.6 +/-    1.35  0.050 / 0.170
G13     303.1          32.1                7.7 +/-    1.54      12.9 +/-    1.54  0.040 / 0.020
G17     209.8          49.8                9.2 +/-    0.41      11.6 +/-    0.41  0.030 / 0.020
G19     211.7          23.0               11.1 +/-    1.91      22.7 +/-    1.91  0.040 / 0.040
G28     336.5          61.6                9.0 +/-    0.69      10.1 +/-    0.69  0.050 / 0.050
G30     60.5           80.2                8.1 +/-    1.11       8.2 +/-    1.11  0.070 / 0.100