PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-22:12:50
G10     246.2          23.1               12.2 +/-    2.05      24.9 +/-    2.05  0.040 / 0.040
G13     58.6           32.4                7.9 +/-    1.64      13.2 +/-    1.64  0.030 / 0.050
G15     104.3          58.9                9.5 +/-    1.13      10.8 +/-    1.13  0.220 / 0.480
G16     299.2          16.1                8.1 +/-    2.49      19.5 +/-    2.49  0.200 / 0.430
G20     250.2          15.6                5.1 +/-    3.87      12.6 +/-    3.87  0.070 / 0.120
G21     326.3          55.7                8.2 +/-    0.73       9.7 +/-    0.73  0.060 / 0.150
G26     271.3          17.7               10.5 +/-    1.57      24.5 +/-    1.57  0.030 / 0.030
G29     163.7          57.3               10.3 +/-    0.22      12.0 +/-    0.22  0.020 / 0.030