PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-18:57:10
G02     224.0          66.0               13.5 +/-    0.78      14.6 +/-    0.78  0.090 / 0.110
G06     45.4           65.6               13.0 +/-    0.49      14.2 +/-    0.49  0.060 / 0.090
G12     321.5          46.3               13.2 +/-    0.65      17.4 +/-    0.65  0.030 / 0.030
G17     63.5           27.9               12.3 +/-    2.18      22.5 +/-    2.18  0.030 / 0.030
G19     44.9           46.6               12.5 +/-    1.10      16.4 +/-    1.10  0.060 / 0.060
G24     254.1          39.3               15.5 +/-    2.83      22.9 +/-    2.83  0.040 / 0.060