PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-22:43:10
G05     48.3           20.8                8.9 +/-    0.61      19.2 +/-    0.61  0.120 / 0.300
G10     236.5          11.7               19.1 +/-   49.74      51.4 +/-   49.74  0.120 / 0.330
G13     77.1           37.5               13.9 +/-    0.46      21.1 +/-    0.46  0.040 / 0.080
G15     126.1          52.1               18.0 +/-    0.92      22.1 +/-    0.92  0.050 / 0.070
G16     315.7          11.2                9.5 +/-    4.02      25.9 +/-    4.02  0.130 / 0.350
G18     245.5          41.7               18.1 +/-    1.25      25.7 +/-    1.25  0.130 / 0.300
G20     29.5           65.1               13.4 +/-    0.54      14.6 +/-    0.54  0.060 / 0.160
G21     313.3          47.6               13.5 +/-    0.85      17.5 +/-    0.85  0.060 / 0.140
G26     289.5          19.7               13.0 +/-    2.02      28.9 +/-    2.02  0.030 / 0.050
G29     154.7          68.9               16.6 +/-    0.93      17.7 +/-    0.93  0.020 / 0.040