PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/27-16:12:40
G02     62.0           30.4                9.4 +/-    1.27      16.2 +/-    1.27  0.030 / 0.040
G05     57.0           61.6               10.4 +/-    0.33      11.6 +/-    0.33  0.040 / 0.040
G12     185.5          30.9               11.5 +/-    0.71      19.8 +/-    0.71  0.070 / 0.110
G13     127.9          16.7               15.0 +/-    1.65      35.8 +/-    1.65  0.080 / 0.090
G15     161.9          14.1               12.9 +/-    2.53      32.7 +/-    2.53  0.070 / 0.320
G20     209.6          61.8               13.1 +/-    0.63      14.7 +/-    0.63  0.090 / 0.260
G21     274.0          21.2                7.5 +/-    2.87      16.1 +/-    2.87  0.040 / 0.060
G25     231.0          49.7               13.1 +/-    1.55      16.5 +/-    1.55  0.060 / 0.060
G29     336.0          62.5                9.6 +/-    0.48      10.6 +/-    0.48  0.040 / 0.040