PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-02:43:00
G07     334.2          58.3                2.8 +/-    0.56       3.3 +/-    0.56  0.110 / 0.200
G08     98.0           51.9                4.3 +/-    0.40       5.3 +/-    0.40  0.120 / 0.140
G09     192.5          73.8                6.1 +/-    0.67       6.4 +/-    0.67  0.040 / 0.040
G11     145.9          12.9                4.1 +/-    1.10      10.8 +/-    1.10  0.040 / 0.040
G16     46.6           10.3                2.3 +/-    2.53       6.3 +/-    2.53  0.250 / 0.340
G23     155.8          42.0                5.0 +/-    0.38       7.1 +/-    0.38  0.100 / 0.520
G27     53.9           30.7                3.9 +/-    1.87       6.7 +/-    1.87  0.030 / 0.020
G28     238.0          30.6                4.6 +/-    1.94       7.9 +/-    1.94  0.030 / 0.020
G30     303.3          36.7                3.9 +/-    1.50       6.1 +/-    1.50  0.090 / 0.130