PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-17:28:00
G02     318.4          79.9                6.9 +/-    0.98       7.0 +/-    0.98  0.040 / 0.100
G05     165.7          31.4               10.0 +/-    1.29      16.9 +/-    1.29  0.060 / 0.110
G06     41.8           39.6                7.2 +/-    0.76      10.5 +/-    0.76  0.120 / 0.210
G12     312.1          74.8                7.2 +/-    1.02       7.4 +/-    1.02  0.160 / 0.240
G17     85.3           11.0                8.6 +/-    1.71      23.5 +/-    1.71  0.030 / 0.040
G19     71.3           31.3                9.0 +/-    0.49      15.4 +/-    0.49  0.020 / 0.040
G24     227.9          23.4               12.5 +/-    2.11      25.2 +/-    2.11  0.040 / 0.050
G25     317.4          28.2                5.1 +/-    2.29       9.3 +/-    2.29  0.040 / 0.060