PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/12-15:27:50
G01     49.9           25.2                8.7 +/-    2.21      17.0 +/-    2.21  0.040 / 0.050
G06     177.3          24.0               10.0 +/-    1.33      20.0 +/-    1.33  0.040 / 0.060
G11     44.6           16.0                7.5 +/-    3.51      18.2 +/-    3.51  0.140 / 0.310
G13     250.0          31.5                9.3 +/-    2.29      15.7 +/-    2.29  0.160 / 0.310
G15     284.1          15.8               10.1 +/-    0.67      24.6 +/-    0.67  0.040 / 0.030
G17     295.0          78.2               11.2 +/-    0.68      11.4 +/-    0.68  0.030 / 0.020
G19     245.2          60.7               10.1 +/-    0.99      11.4 +/-    0.99  0.040 / 0.050
G28     42.6           56.7               10.5 +/-    1.01      12.3 +/-    1.01  0.040 / 0.040
G30     149.0          40.7               10.4 +/-    0.79      15.0 +/-    0.79  0.100 / 0.170