PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-07:57:50
G08     289.3          21.9                5.4 +/-    1.50      11.3 +/-    1.50  0.080 / 0.090
G10     21.5           63.0                4.8 +/-    0.86       5.3 +/-    0.86  0.080 / 0.090
G14     235.2          47.1                8.9 +/-    1.62      11.6 +/-    1.62  0.070 / 0.110
G18     317.7          14.5                1.6 +/-    1.77       4.0 +/-    1.77  0.090 / 0.120
G20     86.9           31.0                6.1 +/-    1.16      10.5 +/-    1.16  0.080 / 0.150
G21     149.5          34.3                9.0 +/-    1.72      14.6 +/-    1.72  0.060 / 0.130
G24     50.4           22.2                2.5 +/-    1.18       5.3 +/-    1.18  0.040 / 0.100
G27     247.4          28.0                7.5 +/-    2.55      13.8 +/-    2.55  0.040 / 0.100
G31     181.0          13.7                6.8 +/-    2.28      17.4 +/-    2.28  0.030 / 0.030
G32     266.1          74.1                7.6 +/-    0.51       7.9 +/-    0.51  0.030 / 0.030