PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-21:57:50
G10     246.7          23.5               11.4 +/-    1.64      23.1 +/-    1.64  0.030 / 0.040
G13     57.9           32.1                7.3 +/-    1.67      12.3 +/-    1.67  0.030 / 0.040
G15     103.3          59.1                8.7 +/-    1.70      10.0 +/-    1.70  0.160 / 0.410
G16     298.6          16.2                7.3 +/-    3.98      17.6 +/-    3.98  0.140 / 0.350
G20     250.1          14.0               11.5 +/-    3.39      29.3 +/-    3.39  0.060 / 0.100
G21     326.9          56.1                7.9 +/-    0.61       9.3 +/-    0.61  0.050 / 0.110
G26     270.7          17.5               10.8 +/-    3.13      25.4 +/-    3.13  0.030 / 0.030
G29     163.9          56.6                9.1 +/-    0.99      10.7 +/-    0.99  0.030 / 0.030