PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-12:28:10
G01     72.5           32.9                5.4 +/-    1.41       8.8 +/-    1.41  0.030 / 0.040
G07     136.3          30.1                6.0 +/-    0.82      10.5 +/-    0.82  0.040 / 0.040
G11     54.1           29.7                4.0 +/-    0.67       7.1 +/-    0.67  0.050 / 0.070
G13     279.2          36.8                6.6 +/-    0.83      10.1 +/-    0.83  0.050 / 0.120
G15     305.5          14.3                2.4 +/-    2.47       6.0 +/-    2.47  0.110 / 0.290
G17     231.9          70.3                6.0 +/-    0.66       6.4 +/-    0.66  0.120 / 0.280
G19     223.1          42.5                7.9 +/-    1.30      11.0 +/-    1.30  0.050 / 0.070
G28     17.4           59.4                5.3 +/-    0.55       6.1 +/-    0.55  0.040 / 0.070
G30     132.6          65.0                5.8 +/-    0.51       6.3 +/-    0.51  0.030 / 0.030