PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-19:43:10
G02     55.0           37.4                9.5 +/-    0.49      14.5 +/-    0.49  0.030 / 0.030
G05     65.0           64.7               10.2 +/-    0.26      11.1 +/-    0.26  0.030 / 0.030
G12     182.0          33.1               11.7 +/-    1.31      19.3 +/-    1.31  0.130 / 0.560
G13     130.7          12.7               13.2 +/-    2.37      34.6 +/-    2.37  0.140 / 0.540
G21     267.9          14.0                9.1 +/-    1.50      23.2 +/-    1.50  0.060 / 0.070
G25     241.0          54.3                9.9 +/-    2.29      11.9 +/-    2.29  0.070 / 0.070
G29     324.9          49.6                9.3 +/-    0.58      11.8 +/-    0.58  0.080 / 0.080