PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-13:42:50
G01     117.9          18.8                9.8 +/-    1.84      22.3 +/-    1.84  0.030 / 0.030
G07     84.1           65.9                9.0 +/-    0.32       9.7 +/-    0.32  0.040 / 0.040
G08     44.2           29.7                6.0 +/-    0.62      10.6 +/-    0.62  0.150 / 0.240
G09     175.6          23.1                9.3 +/-    1.26      19.0 +/-    1.26  0.120 / 0.230
G11     104.1          40.5                9.6 +/-    0.82      13.9 +/-    0.82  0.030 / 0.040
G13     316.9          20.7                5.6 +/-    1.62      12.1 +/-    1.62  0.020 / 0.040
G17     202.0          26.0                9.0 +/-    0.92      17.1 +/-    0.92  0.040 / 0.090
G18     92.5           21.3                8.6 +/-    1.07      18.2 +/-    1.07  0.050 / 0.080
G28     295.1          57.8                7.9 +/-    1.14       9.1 +/-    1.14  0.040 / 0.060
G30     347.2          69.2                6.5 +/-    1.03       6.9 +/-    1.03  0.050 / 0.060