PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-18:58:00
G02     227.9          67.1               14.4 +/-    1.10      15.5 +/-    1.10  0.050 / 0.050
G06     43.2           63.5               13.1 +/-    0.47      14.4 +/-    0.47  0.040 / 0.040
G12     321.7          47.9               11.8 +/-    0.93      15.3 +/-    0.93  0.110 / 0.090
G17     68.4           23.1                9.4 +/-    3.10      19.3 +/-    3.10  0.060 / 0.070
G19     53.9           40.2               10.8 +/-    1.52      15.7 +/-    1.52  0.130 / 0.250
G24     253.4          37.9               12.7 +/-    3.04      19.1 +/-    3.04  0.140 / 0.320
G25     316.0          12.4               10.6 +/-    2.18      28.1 +/-    2.18  0.040 / 0.040