PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/15-12:43:10
G01     119.5          17.4                4.5 +/-    1.78      10.6 +/-    1.78  0.030 / 0.030
G07     83.0           64.3                4.8 +/-    0.69       5.2 +/-    0.69  0.030 / 0.030
G08     44.8           30.4                4.4 +/-    0.47       7.6 +/-    0.47  0.030 / 0.040
G09     175.2          24.7                5.5 +/-    1.20      10.9 +/-    1.20  0.030 / 0.040
G11     104.9          38.1                5.3 +/-    0.82       7.9 +/-    0.82  0.090 / 0.320
G13     319.0          16.9                3.2 +/-    1.25       7.6 +/-    1.25  0.140 / 0.280
G17     200.8          26.1                4.2 +/-    1.94       8.0 +/-    1.94  0.050 / 0.150
G28     291.7          57.0                4.7 +/-    0.66       5.5 +/-    0.66  0.060 / 0.180
G30     341.7          66.1                4.4 +/-    0.64       4.7 +/-    0.64  0.120 / 0.210