PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/14-20:57:50
G02     27.0           60.2               12.0 +/-    0.35      13.6 +/-    0.35  0.030 / 0.050
G05     145.8          58.2               15.4 +/-    0.91      17.7 +/-    0.91  0.040 / 0.040
G06     51.8           17.8                9.1 +/-    0.94      21.2 +/-    0.94  0.030 / 0.040
G12     197.7          70.9               13.1 +/-    0.71      13.8 +/-    0.71  0.040 / 0.040
G19     95.3           14.9               11.4 +/-    1.24      28.4 +/-    1.24  0.050 / 0.060
G25     302.9          50.5               11.5 +/-    1.31      14.4 +/-    1.31  0.040 / 0.060
G29     303.5          23.5               10.9 +/-    1.71      22.1 +/-    1.71  0.030 / 0.090