PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/22-00:12:30
G10     246.7          23.4               12.6 +/-    1.57      25.5 +/-    1.57  0.030 / 0.050
G13     58.0           32.2                8.1 +/-    1.71      13.5 +/-    1.71  0.030 / 0.050
G15     100.7          58.7               10.2 +/-    0.70      11.7 +/-    0.70  0.150 / 0.340
G16     298.9          16.0                7.4 +/-    1.79      17.9 +/-    1.79  0.160 / 0.390
G20     255.5          31.1               13.6 +/-    3.36      23.2 +/-    3.36  0.060 / 0.130
G21     327.1          56.2                8.7 +/-    0.54      10.2 +/-    0.54  0.050 / 0.120
G26     270.8          17.5               10.6 +/-    2.34      24.9 +/-    2.34  0.030 / 0.030
G29     163.9          56.4                9.6 +/-    0.47      11.3 +/-    0.47  0.030 / 0.040