PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/19-13:12:30
G02     216.8          58.6                7.5 +/-    0.76       8.7 +/-    0.76  0.080 / 0.120
G06     56.3           73.2                5.6 +/-    1.28       5.9 +/-    1.28  0.080 / 0.090
G12     318.3          36.9                4.1 +/-    1.15       6.2 +/-    1.15  0.050 / 0.070
G17     55.8           33.8                3.8 +/-    0.64       6.1 +/-    0.64  0.050 / 0.080
G19     41.1           47.5                4.5 +/-    0.59       5.8 +/-    0.59  0.060 / 0.080
G24     266.6          40.9                7.8 +/-    1.89      11.2 +/-    1.89  0.060 / 0.060
G28     120.6          20.0                7.0 +/-    1.54      15.5 +/-    1.54  0.050 / 0.060