PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/11-19:57:40
G02     23.7           62.8               12.3 +/-    1.12      13.6 +/-    1.12  0.030 / 0.040
G05     155.0          54.4               14.6 +/-    0.56      17.5 +/-    0.56  0.030 / 0.040
G06     51.0           20.3                9.6 +/-    0.82      20.9 +/-    0.82  0.040 / 0.060
G12     207.8          73.4               11.6 +/-    0.49      12.0 +/-    0.49  0.040 / 0.070
G19     96.3           11.7               12.7 +/-    1.27      34.2 +/-    1.27  0.060 / 0.140
G20     197.3          21.5               17.1 +/-    1.40      36.2 +/-    1.40  0.070 / 0.140
G25     300.7          53.8               12.3 +/-    1.54      14.9 +/-    1.54  0.040 / 0.050
G29     304.2          25.5               12.0 +/-    1.45      23.1 +/-    1.45  0.030 / 0.050