PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/17-15:27:30
G01     41.4           16.3                6.5 +/-    0.89      15.7 +/-    0.89  0.130 / 0.200
G06     175.1          38.8               13.3 +/-    1.48      19.7 +/-    1.48  0.110 / 0.190
G13     240.0          22.4                8.6 +/-    2.51      17.9 +/-    2.51  0.140 / 0.340
G15     273.8          12.5                8.6 +/-    1.23      22.8 +/-    1.23  0.120 / 0.330
G17     7.7            69.0                9.1 +/-    0.91       9.7 +/-    0.91  0.050 / 0.120
G19     281.5          70.6                8.5 +/-    0.58       8.9 +/-    0.58  0.060 / 0.120
G24     317.4          17.4                8.2 +/-    2.89      19.3 +/-    2.89  0.030 / 0.030
G28     71.6           46.8                8.1 +/-    0.46      10.6 +/-    0.46  0.030 / 0.030
G30     154.8          29.8               12.1 +/-    0.75      21.2 +/-    0.75  0.110 / 0.190