PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/22-14:27:50
G01     91.1           31.6                8.2 +/-    0.44      13.9 +/-    0.44  0.030 / 0.040
G07     124.8          46.2                9.2 +/-    1.77      12.1 +/-    1.77  0.040 / 0.030
G11     68.8           39.7                7.0 +/-    0.25      10.3 +/-    0.25  0.120 / 0.130
G13     295.3          35.9                7.0 +/-    1.33      11.0 +/-    1.33  0.100 / 0.110
G17     213.8          53.0               12.3 +/-    1.42      15.0 +/-    1.42  0.040 / 0.060
G18     64.2           23.8                6.9 +/-    0.86      13.9 +/-    0.86  0.040 / 0.060
G19     214.5          23.6               11.2 +/-    1.10      22.6 +/-    1.10  0.040 / 0.080
G28     347.3          61.8                5.7 +/-    0.94       6.4 +/-    0.94  0.040 / 0.080
G30     98.9           77.5                8.4 +/-    1.15       8.6 +/-    1.15  0.040 / 0.060