PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/17-07:58:00
G03     236.2          66.1                4.6 +/-    0.47       5.0 +/-    0.47  0.090 / 0.440
G07     250.8          11.8                5.2 +/-    3.01      14.0 +/-    3.01  0.070 / 0.300
G09     306.6          23.9                2.9 +/-    0.79       5.9 +/-    0.79  0.050 / 0.070
G14     103.4          10.4                2.5 +/-    2.64       7.0 +/-    2.64  0.050 / 0.060
G16     123.2          61.7                8.0 +/-    0.73       8.9 +/-    0.73  0.040 / 0.060
G22     192.0          51.8                6.6 +/-    1.61       8.1 +/-    1.61  0.030 / 0.060
G23     320.9          50.5                3.4 +/-    1.16       4.3 +/-    1.16  0.030 / 0.050
G26     66.0           51.5                4.9 +/-    0.44       6.0 +/-    0.44  0.040 / 0.040
G31     53.7           17.7                2.3 +/-    0.73       5.4 +/-    0.73  0.090 / 0.530