PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-06:43:10
G08     298.4          21.6                5.2 +/-    1.22      11.1 +/-    1.22  0.050 / 0.130
G10     0.5            62.8                3.5 +/-    0.46       3.9 +/-    0.46  0.050 / 0.130
G14     227.1          39.4                9.3 +/-    1.22      13.7 +/-    1.22  0.050 / 0.090
G20     72.9           43.5                4.4 +/-    0.36       6.1 +/-    0.36  0.050 / 0.090
G21     145.0          44.0                8.1 +/-    1.08      11.0 +/-    1.08  0.060 / 0.110
G24     58.5           26.5                3.2 +/-    0.95       6.1 +/-    0.95  0.080 / 0.120
G27     257.4          33.0                7.5 +/-    2.06      12.4 +/-    2.06  0.030 / 0.030
G32     241.7          67.2                8.2 +/-    0.74       8.8 +/-    0.74  0.040 / 0.030