PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-14:12:40
G01     85.8           32.6                8.2 +/-    1.36      13.6 +/-    1.36  0.020 / 0.030
G07     128.8          42.2                9.4 +/-    1.43      13.3 +/-    1.43  0.040 / 0.040
G11     63.8           37.6                6.3 +/-    0.52       9.6 +/-    0.52  0.060 / 0.100
G13     290.0          37.1                8.7 +/-    1.13      13.2 +/-    1.13  0.060 / 0.090
G17     217.4          57.8                9.6 +/-    1.47      11.1 +/-    1.47  0.040 / 0.060
G18     59.7           22.8                6.9 +/-    1.05      14.2 +/-    1.05  0.040 / 0.050
G19     216.6          27.5                8.5 +/-    1.66      15.7 +/-    1.66  0.070 / 0.100
G28     356.0          61.5                8.5 +/-    1.33       9.6 +/-    1.33  0.060 / 0.110
G30     113.7          74.4                7.8 +/-    0.71       8.0 +/-    0.71  0.050 / 0.080