PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-06:43:10
G01     55.0           28.3                3.8 +/-    1.56       6.8 +/-    1.56  0.050 / 0.040
G06     182.3          15.9                5.6 +/-    1.33      13.7 +/-    1.33  0.040 / 0.030
G07     144.3          17.0                6.0 +/-    1.10      14.2 +/-    1.10  0.130 / 0.250
G11     46.5           19.8                3.0 +/-    3.08       6.6 +/-    3.08  0.110 / 0.210
G13     258.1          33.0                5.9 +/-    2.62       9.7 +/-    2.62  0.030 / 0.020
G15     288.5          16.7                4.9 +/-    1.52      11.6 +/-    1.52  0.020 / 0.010
G17     288.5          79.2                6.7 +/-    0.91       6.8 +/-    0.91  0.130 / 0.060
G19     239.5          56.7                7.6 +/-    2.56       8.9 +/-    2.56  0.130 / 0.090
G28     45.1           54.5                5.5 +/-    0.81       6.5 +/-    0.81  0.100 / 0.140
G30     146.3          45.5                7.7 +/-    0.49      10.3 +/-    0.49  0.080 / 0.130