PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/19-14:27:30
G02     204.5          33.3                9.3 +/-    1.62      15.2 +/-    1.62  0.080 / 0.070
G06     154.2          70.8                7.9 +/-    0.70       8.3 +/-    0.70  0.070 / 0.090
G12     307.6          16.0                5.9 +/-    2.44      14.3 +/-    2.44  0.030 / 0.050
G17     33.7           51.0                6.4 +/-    1.13       8.0 +/-    1.13  0.060 / 0.050
G19     7.6            63.7                7.1 +/-    0.61       7.8 +/-    0.61  0.030 / 0.030
G24     296.9          37.9                6.6 +/-    3.22       9.9 +/-    3.22  0.040 / 0.030
G28     100.3          36.0                8.3 +/-    0.88      12.9 +/-    0.88  0.040 / 0.040