PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-14:57:40
G01     85.8           32.6               10.4 +/-    0.64      17.2 +/-    0.64  0.030 / 0.030
G07     128.8          42.3               10.8 +/-    1.04      15.2 +/-    1.04  0.030 / 0.030
G11     64.1           37.8                8.2 +/-    0.36      12.4 +/-    0.36  0.070 / 0.100
G13     290.0          37.1               10.2 +/-    1.29      15.6 +/-    1.29  0.060 / 0.090
G17     217.5          57.2               11.5 +/-    0.85      13.4 +/-    0.85  0.030 / 0.060
G18     59.8           22.9                7.6 +/-    0.72      15.7 +/-    0.72  0.030 / 0.060
G19     216.6          27.7               10.2 +/-    1.50      18.8 +/-    1.50  0.060 / 0.090
G28     356.2          61.5                9.8 +/-    0.94      11.0 +/-    0.94  0.060 / 0.090
G30     114.1          74.1               10.9 +/-    1.16      11.3 +/-    1.16  0.050 / 0.130