PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-17:57:40
G02     223.9          64.9               10.2 +/-    1.15      11.1 +/-    1.15  0.040 / 0.060
G06     45.5           66.9                8.8 +/-    0.50       9.5 +/-    0.50  0.030 / 0.050
G12     321.0          44.4                9.5 +/-    0.68      12.9 +/-    0.68  0.060 / 0.090
G17     65.9           25.0                8.4 +/-    1.70      16.3 +/-    1.70  0.070 / 0.070
G19     50.7           42.2                8.0 +/-    0.91      11.2 +/-    0.91  0.030 / 0.060
G24     257.3          39.2               11.8 +/-    2.78      17.5 +/-    2.78  0.030 / 0.050