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                7.1 +/-    1.23      14.5 +/-    1.23  0.030 / 0.020
G10     22.0           63.2                6.7 +/-    1.28       7.4 +/-    1.28  0.030 / 0.020
G14     238.6          54.9                8.5 +/-    2.56      10.2 +/-    2.56  0.090 / 0.240
G18     71.1           48.6                6.5 +/-    1.28       8.4 +/-    1.28  0.120 / 0.200
G21     149.4          32.9                9.3 +/-    1.58      15.4 +/-    1.58  0.030 / 0.020
G24     50.7           22.9                6.1 +/-    2.33      12.5 +/-    2.33  0.040 / 0.030
G27     245.0          27.0                7.7 +/-    2.10      14.3 +/-    2.10  0.050 / 0.100
G31     181.9          13.3                7.3 +/-    3.25      19.0 +/-    3.25  0.070 / 0.090
G32     265.0          72.5                6.6 +/-    0.63       6.9 +/-    0.63  0.070 / 0.120