PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-12:27:30
G01     73.1           33.0                5.1 +/-    1.27       8.4 +/-    1.27  0.060 / 0.090
G07     136.1          30.5                6.0 +/-    0.95      10.4 +/-    0.95  0.060 / 0.090
G11     54.4           30.0                4.7 +/-    1.96       8.3 +/-    1.96  0.060 / 0.070
G13     279.7          36.9                6.2 +/-    1.00       9.5 +/-    1.00  0.060 / 0.090
G15     305.9          14.2                2.3 +/-    1.82       5.7 +/-    1.82  0.040 / 0.030
G17     231.0          69.9                6.7 +/-    0.49       7.1 +/-    0.49  0.030 / 0.030
G19     222.8          42.0                6.8 +/-    1.87       9.6 +/-    1.87  0.030 / 0.030
G28     16.5           59.5                5.6 +/-    0.83       6.4 +/-    0.83  0.030 / 0.030
G30     132.0          65.5                7.0 +/-    0.91       7.6 +/-    0.91  0.080 / 0.230