PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-01:13:10
G10     249.3          24.6               11.1 +/-    1.00      22.0 +/-    1.00  0.080 / 0.440
G13     55.9           32.0                9.6 +/-    1.23      16.2 +/-    1.23  0.100 / 0.430
G15     94.7           58.8               12.3 +/-    1.06      14.1 +/-    1.06  0.170 / 0.340
G16     298.5          14.7                5.6 +/-    1.76      14.0 +/-    1.76  0.120 / 0.320
G18     265.5          53.6               10.2 +/-    2.70      12.3 +/-    2.70  0.070 / 0.120
G20     42.7           48.4                9.3 +/-    1.26      12.0 +/-    1.26  0.090 / 0.130
G21     331.1          59.1                9.1 +/-    0.42      10.4 +/-    0.42  0.030 / 0.030
G26     270.7          16.1               10.2 +/-    1.81      24.6 +/-    1.81  0.040 / 0.040
G29     163.9          49.7               11.1 +/-    0.76      14.1 +/-    0.76  0.040 / 0.050