PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/22-14:27:40
G01     91.1           31.6                8.8 +/-    0.79      14.9 +/-    0.79  0.030 / 0.020
G07     124.8          46.2               10.7 +/-    0.75      14.2 +/-    0.75  0.030 / 0.030
G11     68.8           39.7                7.9 +/-    1.10      11.5 +/-    1.10  0.040 / 0.060
G13     295.3          35.9                9.4 +/-    2.45      14.7 +/-    2.45  0.040 / 0.050
G17     213.8          53.0               11.3 +/-    0.78      13.8 +/-    0.78  0.080 / 0.110
G18     64.2           23.8                7.5 +/-    1.61      15.1 +/-    1.61  0.070 / 0.100
G19     214.5          23.6               10.3 +/-    2.16      20.9 +/-    2.16  0.070 / 0.110
G28     347.3          61.8                8.5 +/-    0.67       9.5 +/-    0.67  0.070 / 0.110
G30     98.9           77.5               10.4 +/-    0.43      10.6 +/-    0.43  0.080 / 0.130