PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/09-02:27:50
G01     63.9           31.7                3.4 +/-    1.16       5.7 +/-    1.16  0.040 / 0.050
G07     140.7          25.7                7.0 +/-    2.00      13.5 +/-    2.00  0.040 / 0.050
G11     51.3           28.3                3.1 +/-    1.66       5.5 +/-    1.66  0.020 / 0.030
G13     267.9          36.1                4.7 +/-    1.58       7.3 +/-    1.58  0.030 / 0.030
G15     296.4          16.6                3.4 +/-    1.14       8.1 +/-    1.14  0.050 / 0.080
G17     246.3          72.8                3.9 +/-    0.60       4.1 +/-    0.60  0.070 / 0.070
G19     229.5          48.1                4.4 +/-    2.15       5.6 +/-    2.15  0.070 / 0.110
G28     31.1           57.4                2.5 +/-    0.53       2.9 +/-    0.53  0.070 / 0.100
G30     140.3          51.4                7.4 +/-    0.30       9.2 +/-    0.30  0.070 / 0.190