PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/12-15:58:10
G01     39.2           12.7                8.6 +/-    1.49      22.5 +/-    1.49  0.080 / 0.260
G06     173.8          44.0               12.4 +/-    0.70      16.9 +/-    0.70  0.090 / 0.260
G13     235.9          19.3               11.2 +/-    4.06      25.1 +/-    4.06  0.300 / 0.270
G15     269.7          10.8                9.6 +/-    1.70      26.3 +/-    1.70  0.300 / 0.320
G17     15.0           65.1                9.7 +/-    0.74      10.5 +/-    0.74  0.210 / 0.460
G19     298.2          72.0               10.2 +/-    0.98      10.6 +/-    0.98  0.260 / 0.380
G24     315.8          21.3                6.9 +/-    5.50      14.8 +/-    5.50  0.110 / 0.100
G28     77.7           44.4               11.0 +/-    1.99      14.9 +/-    1.99  0.080 / 0.140
G30     156.1          25.2                9.5 +/-    1.28      18.6 +/-    1.28  0.030 / 0.030