PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/17-02:57:40
G07     57.2           68.5                4.2 +/-    0.56       4.4 +/-    0.56  0.030 / 0.030
G08     49.5           37.6                3.3 +/-    0.96       5.0 +/-    0.96  0.030 / 0.030
G09     176.5          35.0                5.8 +/-    0.76       9.3 +/-    0.76  0.110 / 0.240
G11     116.8          35.4                5.1 +/-    0.84       8.0 +/-    0.84  0.090 / 0.230
G17     198.7          16.6                4.5 +/-    2.27      10.7 +/-    2.27  0.060 / 0.260
G18     100.9          16.3                5.5 +/-    1.34      13.3 +/-    1.34  0.060 / 0.250
G23     161.5          10.1                5.1 +/-    2.09      14.1 +/-    2.09  0.130 / 0.130
G27     37.7           9.9                 2.5 +/-    5.55       7.0 +/-    5.55  0.090 / 0.140
G28     272.7          50.9                2.9 +/-    3.21       3.7 +/-    3.21  0.040 / 0.030
G30     330.2          58.9                2.6 +/-    0.43       3.0 +/-    0.43  0.040 / 0.040