PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-06:43:00
G01     52.0           26.7                5.0 +/-    0.91       9.4 +/-    0.91  0.040 / 0.050
G06     181.7          18.9                6.8 +/-    2.28      15.3 +/-    2.28  0.030 / 0.050
G07     145.5          14.1                6.9 +/-    1.78      17.5 +/-    1.78  0.120 / 0.360
G11     45.4           17.2                2.8 +/-    0.87       6.5 +/-    0.87  0.110 / 0.330
G13     254.4          31.5               10.3 +/-    1.27      17.5 +/-    1.27  0.090 / 0.120
G15     285.3          16.4                7.8 +/-    3.35      18.9 +/-    3.35  0.090 / 0.160
G17     307.2          79.1                6.6 +/-    0.92       6.7 +/-    0.92  0.120 / 0.310
G19     244.2          59.5                9.6 +/-    0.68      10.9 +/-    0.68  0.110 / 0.270
G28     50.1           53.3                5.3 +/-    0.67       6.5 +/-    0.67  0.140 / 0.290
G30     148.0          42.1                9.8 +/-    0.88      13.8 +/-    0.88  0.140 / 0.290