PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-15:57:40
G02     228.4          69.6                9.6 +/-    1.00      10.2 +/-    1.00  0.060 / 0.050
G06     43.1           64.9                8.6 +/-    0.31       9.4 +/-    0.31  0.040 / 0.050
G12     321.3          46.4                8.6 +/-    1.53      11.3 +/-    1.53  0.190 / 0.510
G17     68.3           23.3                8.5 +/-    0.60      17.2 +/-    0.60  0.170 / 0.420
G19     53.7           40.4                9.8 +/-    0.50      14.1 +/-    0.50  0.040 / 0.040
G24     253.5          37.8               11.4 +/-    1.18      17.2 +/-    1.18  0.030 / 0.040
G25     315.8          10.8              -11.7 +/-   33.71     -32.1 +/-   33.71  0.060 / 0.140