PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-18:28:00
G02     314.9          80.4               12.9 +/-    0.51      13.0 +/-    0.51  0.030 / 0.040
G05     169.5          27.9               15.6 +/-    0.82      28.6 +/-    0.82  0.030 / 0.040
G06     41.3           42.7               10.3 +/-    0.36      14.4 +/-    0.36  0.070 / 0.130
G12     314.3          69.4                9.9 +/-    0.56      10.5 +/-    0.56  0.090 / 0.130
G17     85.7           10.4               12.0 +/-    2.60      33.1 +/-    2.60  0.080 / 0.160
G19     74.3           27.0               11.2 +/-    0.62      21.0 +/-    0.62  0.080 / 0.180
G24     231.9          25.0               13.4 +/-    0.89      26.2 +/-    0.89  0.080 / 0.310
G25     317.2          31.0               10.6 +/-    1.32      18.3 +/-    1.32  0.060 / 0.330