PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/04-20:27:10
G02     49.0           42.2                9.8 +/-    0.95      13.8 +/-    0.95  0.030 / 0.040
G05     83.4           68.7                9.8 +/-    0.34      10.5 +/-    0.34  0.030 / 0.030
G12     183.7          42.0               10.8 +/-    2.06      15.3 +/-    2.06  0.070 / 0.070
G25     256.1          57.9                9.4 +/-    0.85      10.8 +/-    0.85  0.050 / 0.070
G29     320.1          42.8               10.0 +/-    1.28      14.0 +/-    1.28  0.050 / 0.070