PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-11:28:10
G01     63.1           31.3                4.1 +/-    0.76       7.1 +/-    0.76  0.100 / 0.380
G06     181.8          11.4               -4.3 +/-   31.31     -11.5 +/-   31.31  0.090 / 0.310
G07     140.7          23.1                4.9 +/-    1.66      10.1 +/-    1.66  0.060 / 0.170
G11     49.2           24.3                2.7 +/-    1.79       5.3 +/-    1.79  0.060 / 0.210
G13     268.5          35.7                6.0 +/-    1.47       9.4 +/-    1.47  0.030 / 0.060
G15     297.6          16.0                4.0 +/-    1.74       9.6 +/-    1.74  0.040 / 0.050
G17     254.0          76.8                5.0 +/-    0.67       5.2 +/-    0.67  0.070 / 0.080
G19     230.2          50.0                6.7 +/-    1.32       8.4 +/-    1.32  0.060 / 0.110
G28     31.7           57.3                3.3 +/-    0.82       3.9 +/-    0.82  0.160 / 0.300
G30     141.1          56.4                5.2 +/-    0.36       6.1 +/-    0.36  0.140 / 0.440