PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-10:58:10
G01     86.4           32.4                4.0 +/-    1.62       6.7 +/-    1.62  0.080 / 0.140
G07     128.3          40.7                6.9 +/-    1.06       9.9 +/-    1.06  0.080 / 0.110
G11     64.4           36.7                5.7 +/-    1.44       8.7 +/-    1.44  0.030 / 0.020
G13     293.1          35.6                8.2 +/-    2.67      12.9 +/-    2.67  0.030 / 0.020
G15     314.1          10.8               -6.6 +/-   12.32     -18.2 +/-   12.32  0.060 / 0.050
G17     216.8          59.2                6.9 +/-    0.84       7.9 +/-    0.84  0.060 / 0.060
G19     216.0          31.6                8.2 +/-    2.08      13.9 +/-    2.08  0.040 / 0.040
G28     356.1          61.3                5.5 +/-    0.71       6.2 +/-    0.71  0.040 / 0.050
G30     110.4          74.8                6.5 +/-    0.82       6.8 +/-    0.82  0.200 / 0.180