PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-07:43:10
G03     248.2          68.1                6.3 +/-    1.02       6.8 +/-    1.02  0.090 / 0.170
G09     304.1          20.6                2.0 +/-    1.33       4.4 +/-    1.33  0.100 / 0.200
G14     99.9           13.3                4.3 +/-    1.99      11.1 +/-    1.99  0.040 / 0.060
G16     131.7          58.4                8.4 +/-    0.47       9.7 +/-    0.47  0.040 / 0.050
G22     194.9          56.5                6.6 +/-    0.65       7.7 +/-    0.65  0.030 / 0.040
G23     317.5          47.0                5.9 +/-    0.77       7.7 +/-    0.77  0.040 / 0.040
G26     73.0           53.6                7.0 +/-    0.50       8.5 +/-    0.50  0.040 / 0.040
G31     51.4           21.1                2.2 +/-    2.23       4.7 +/-    2.23  0.040 / 0.040