PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-00:27:50
G10     276.2          42.5                9.0 +/-    0.72      12.6 +/-    0.72  0.040 / 0.050
G13     39.3           13.1                6.7 +/-    1.04      17.3 +/-    1.04  0.040 / 0.050
G15     52.8           43.5                8.1 +/-    0.87      11.2 +/-    0.87  0.130 / 0.300
G18     318.2          66.1                7.9 +/-    1.00       8.6 +/-    1.00  0.110 / 0.260
G20     60.9           27.5                6.3 +/-    0.46      11.6 +/-    0.46  0.060 / 0.080
G21     31.2           76.3               10.2 +/-    0.35      10.4 +/-    0.35  0.050 / 0.070
G24     114.3          18.8               10.8 +/-    1.37      24.6 +/-    1.37  0.070 / 0.190
G27     312.8          26.5                9.7 +/-    2.09      18.4 +/-    2.09  0.060 / 0.170
G29     167.5          20.0               10.7 +/-    1.62      23.5 +/-    1.62  0.060 / 0.120
G32     206.3          15.7               13.0 +/-    0.95      31.9 +/-    0.95  0.070 / 0.130