PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-04:27:50
G08     283.5          23.2                8.8 +/-    3.57      18.0 +/-    3.57  0.040 / 0.030
G10     22.0           63.2                5.9 +/-    1.04       6.5 +/-    1.04  0.040 / 0.030
G14     238.6          54.9                8.1 +/-    1.67       9.7 +/-    1.67  0.100 / 0.140
G18     71.1           48.6                7.5 +/-    0.75       9.6 +/-    0.75  0.110 / 0.130
G21     149.4          32.9                8.8 +/-    1.83      14.6 +/-    1.83  0.060 / 0.120
G24     50.7           22.9                7.3 +/-    1.25      15.0 +/-    1.25  0.050 / 0.120
G27     245.0          27.0                9.8 +/-    2.65      18.3 +/-    2.65  0.030 / 0.030
G31     181.9          13.3                9.3 +/-    2.19      24.1 +/-    2.19  0.030 / 0.030
G32     265.0          72.5                6.6 +/-    1.09       6.8 +/-    1.09  0.060 / 0.070