PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-10:12:40
G01     89.4           32.0                4.5 +/-    0.98       7.5 +/-    0.98  0.050 / 0.050
G07     126.3          44.1                7.1 +/-    0.66       9.7 +/-    0.66  0.050 / 0.040
G11     66.4           38.8                4.8 +/-    1.08       7.2 +/-    1.08  0.080 / 0.110
G13     293.4          36.5                6.3 +/-    2.33       9.7 +/-    2.33  0.100 / 0.090
G17     214.5          56.1                6.6 +/-    0.80       7.7 +/-    0.80  0.020 / 0.020
G18     61.6           23.0                3.5 +/-    1.65       7.2 +/-    1.65  0.030 / 0.030
G19     215.2          23.6                6.9 +/-    2.12      13.8 +/-    2.12  0.100 / 0.110
G28     348.3          61.8                5.0 +/-    0.61       5.6 +/-    0.61  0.100 / 0.120
G30     103.4          77.2                5.5 +/-    0.43       5.7 +/-    0.43  0.080 / 0.160