PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-22:57:40
G02     225.7          69.4               12.5 +/-    0.33      13.3 +/-    0.33  0.040 / 0.050
G05     173.9          10.4               -4.2 +/-   27.44     -11.7 +/-   27.44  0.040 / 0.070
G06     44.4           65.4               11.2 +/-    0.35      12.2 +/-    0.35  0.040 / 0.050
G12     321.0          44.9               11.6 +/-    0.61      15.6 +/-    0.61  0.040 / 0.060
G17     63.0           29.5               10.7 +/-    1.44      19.0 +/-    1.44  0.030 / 0.020
G19     47.7           44.8               11.9 +/-    0.77      16.1 +/-    0.77  0.030 / 0.030
G24     253.8          38.7               14.7 +/-    1.49      21.9 +/-    1.49  0.090 / 0.250