PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-17:43:00
G02     53.4           39.1                8.7 +/-    0.83      12.9 +/-    0.83  0.030 / 0.040
G05     70.1           67.4                8.0 +/-    0.36       8.6 +/-    0.36  0.030 / 0.030
G12     183.2          35.3                8.8 +/-    2.29      13.9 +/-    2.29  0.130 / 0.300
G13     131.4          12.0               11.0 +/-    3.09      29.2 +/-    3.09  0.120 / 0.310
G21     267.7          14.4               10.4 +/-    1.50      26.4 +/-    1.50  0.090 / 0.110
G25     240.2          54.7                9.6 +/-    0.83      11.5 +/-    0.83  0.040 / 0.090
G29     324.9          49.4                8.6 +/-    1.25      11.0 +/-    1.25  0.050 / 0.070