PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-19:57:40
G02     306.9          80.2               10.8 +/-    0.96      11.0 +/-    0.96  0.030 / 0.020
G05     168.4          28.8               14.4 +/-    0.92      25.8 +/-    0.92  0.030 / 0.020
G06     41.4           42.1                9.0 +/-    1.09      12.7 +/-    1.09  0.030 / 0.020
G12     314.1          70.3               10.2 +/-    0.76      10.7 +/-    0.76  0.030 / 0.030
G17     85.7           10.4                9.4 +/-    1.44      25.9 +/-    1.44  0.090 / 0.130
G19     74.4           26.9                9.0 +/-    2.51      16.9 +/-    2.51  0.090 / 0.140
G24     231.9          25.0               12.5 +/-    1.68      24.5 +/-    1.68  0.260 / 0.230
G25     317.2          31.5               10.3 +/-    1.43      17.6 +/-    1.43  0.170 / 0.210