PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-09:58:00
G08     274.6          18.8                5.3 +/-    1.11      12.0 +/-    1.11  0.050 / 0.070
G10     54.3           59.9                4.4 +/-    0.62       5.0 +/-    0.62  0.050 / 0.070
G14     255.7          60.2                7.7 +/-    0.99       8.7 +/-    0.99  0.100 / 0.120
G18     314.3          27.9                5.5 +/-    3.10      10.1 +/-    3.10  0.140 / 0.100
G20     103.6          10.5                3.4 +/-    1.90       9.4 +/-    1.90  0.100 / 0.480
G21     154.0          18.6                5.6 +/-    2.42      12.8 +/-    2.42  0.090 / 0.530
G24     41.1           12.5                2.5 +/-    1.51       6.6 +/-    1.51  0.020 / 0.010
G27     233.9          18.0                6.3 +/-    1.45      14.5 +/-    1.45  0.030 / 0.010
G31     177.6          28.5                6.5 +/-    1.49      11.7 +/-    1.49  0.150 / 0.230
G32     332.9          75.4                4.4 +/-    0.78       4.6 +/-    0.78  0.140 / 0.250