PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-07:57:50
G07     329.1          56.6                2.4 +/-    1.03       2.8 +/-    1.03  0.070 / 0.130
G08     101.5          50.5                6.3 +/-    0.66       7.9 +/-    0.66  0.080 / 0.110
G09     180.7          73.0                3.7 +/-    0.70       3.9 +/-    0.70  0.120 / 0.190
G11     146.8          11.7                6.1 +/-    2.00      16.3 +/-    2.00  0.100 / 0.170
G23     154.8          46.2                6.5 +/-    0.80       8.6 +/-    0.80  0.030 / 0.060
G27     59.4           34.1                3.9 +/-    0.60       6.2 +/-    0.60  0.040 / 0.050
G28     234.5          26.0                4.1 +/-    0.94       7.7 +/-    0.94  0.050 / 0.070
G30     298.5          31.6                3.3 +/-    1.87       5.5 +/-    1.87  0.050 / 0.090