PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/30-18:58:10
G02     54.8           37.7                7.4 +/-    1.11      11.3 +/-    1.11  0.020 / 0.030
G05     65.3           64.9                9.3 +/-    0.33      10.2 +/-    0.33  0.030 / 0.030
G12     181.6          32.7                9.2 +/-    1.42      15.3 +/-    1.42  0.110 / 0.500
G13     130.7          12.7               12.7 +/-    2.50      33.3 +/-    2.50  0.120 / 0.380
G21     267.9          13.9                9.8 +/-    2.27      24.9 +/-    2.27  0.070 / 0.110
G25     240.7          54.3                8.3 +/-    2.66       9.9 +/-    2.66  0.080 / 0.090
G29     324.9          49.6                7.1 +/-    0.54       9.0 +/-    0.54  0.060 / 0.100