PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/17-00:57:40
G01     63.0           31.3                5.3 +/-    1.28       8.9 +/-    1.28  0.040 / 0.040
G07     140.4          21.2                7.2 +/-    2.17      15.5 +/-    2.17  0.050 / 0.040
G11     48.7           24.7                5.2 +/-    2.10      10.2 +/-    2.10  0.090 / 0.090
G13     265.4          36.7                6.3 +/-    1.83       9.6 +/-    1.83  0.080 / 0.090
G15     296.4          16.2                5.9 +/-    1.73      14.2 +/-    1.73  0.070 / 0.120
G17     252.3          76.9                7.2 +/-    0.25       7.4 +/-    0.25  0.070 / 0.160
G18     41.7           11.9                3.3 +/-    1.60       8.9 +/-    1.60  0.090 / 0.080
G19     229.1          47.3                7.0 +/-    2.29       9.2 +/-    2.29  0.100 / 0.120
G28     25.1           59.0                6.4 +/-    1.52       7.3 +/-    1.52  0.320 / 0.290
G30     141.7          55.6                7.2 +/-    0.64       8.5 +/-    0.64  0.190 / 0.310