PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-15:12:50
G01     49.4           25.0                6.6 +/-    0.68      12.9 +/-    0.68  0.040 / 0.060
G06     176.1          27.5               10.1 +/-    1.29      18.6 +/-    1.29  0.040 / 0.050
G07     146.5          11.7                8.8 +/-    1.71      23.7 +/-    1.71  0.070 / 0.100
G11     44.2           13.6                5.0 +/-    1.30      12.8 +/-    1.30  0.050 / 0.120
G13     249.3          30.0                8.7 +/-    2.18      15.3 +/-    2.18  0.110 / 0.270
G15     285.8          14.7                5.6 +/-    1.46      13.9 +/-    1.46  0.110 / 0.260
G17     322.0          78.4                8.2 +/-    0.77       8.4 +/-    0.77  0.040 / 0.060
G19     245.9          57.4                9.9 +/-    0.96      11.5 +/-    0.96  0.040 / 0.060
G28     53.5           52.6                7.2 +/-    0.62       8.8 +/-    0.62  0.070 / 0.250
G30     150.5          41.7                9.7 +/-    1.02      13.7 +/-    1.02  0.100 / 0.210