PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-03:42:50
G08     285.2          22.8               12.6 +/-    1.51      25.8 +/-    1.51  0.080 / 0.130
G10     24.7           62.8                5.9 +/-    0.59       6.5 +/-    0.59  0.090 / 0.130
G14     237.1          50.8               12.6 +/-    1.16      15.7 +/-    1.16  0.050 / 0.070
G18     317.5          16.3                9.1 +/-    2.55      22.1 +/-    2.55  0.050 / 0.080
G20     54.9           61.0                7.6 +/-    0.49       8.6 +/-    0.49  0.050 / 0.120
G21     150.2          33.6               10.1 +/-    0.79      16.5 +/-    0.79  0.050 / 0.110
G24     48.8           20.8                4.4 +/-    1.46       9.4 +/-    1.46  0.030 / 0.030
G27     246.7          27.4               13.0 +/-    1.82      24.1 +/-    1.82  0.030 / 0.040
G31     180.7          14.8               12.8 +/-    0.99      32.1 +/-    0.99  0.090 / 0.130
G32     270.8          74.9                8.6 +/-    0.64       8.9 +/-    0.64  0.070 / 0.140