PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-13:57:50
G02     201.2          18.0                6.6 +/-    3.02      15.4 +/-    3.02  0.040 / 0.040
G06     169.1          54.2                8.9 +/-    0.86      10.7 +/-    0.86  0.030 / 0.040
G13     226.0          13.5                5.2 +/-   10.99      13.5 +/-   10.99  0.170 / 0.980
G17     16.1           62.7                6.7 +/-    0.85       7.5 +/-    0.85  0.240 / 0.550
G19     327.5          71.5                6.2 +/-    0.91       6.5 +/-    0.91  0.040 / 0.040
G24     310.3          28.6                5.2 +/-    2.03       9.5 +/-    2.03  0.040 / 0.040
G28     82.7           45.2                8.3 +/-    1.00      11.1 +/-    1.00  0.030 / 0.030
G30     157.2          14.9                7.4 +/-    1.74      18.5 +/-    1.74  0.040 / 0.040