PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/31-05:42:50
G08     298.6          22.2                4.5 +/-    1.06       9.4 +/-    1.06  0.100 / 0.120
G10     1.4            62.6                4.2 +/-    0.41       4.7 +/-    0.41  0.090 / 0.130
G14     225.9          43.0                8.1 +/-    0.92      11.3 +/-    0.92  0.050 / 0.080
G20     59.4           54.4                4.6 +/-    0.55       5.5 +/-    0.55  0.040 / 0.090
G21     144.4          44.2               -2.4 +/-    1.61      -3.2 +/-    1.61  0.050 / 0.090
G24     59.8           27.0                3.9 +/-    0.71       7.2 +/-    0.71  0.050 / 0.110
G27     260.3          33.9                6.6 +/-    1.20      10.6 +/-    1.20  0.030 / 0.040
G32     236.5          61.1                7.6 +/-    0.62       8.6 +/-    0.62  0.030 / 0.030