PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-07:27:50
G08     285.1          22.8                3.0 +/-    1.04       6.1 +/-    1.04  0.120 / 0.110
G10     28.3           62.2                2.4 +/-    2.31       2.7 +/-    2.31  0.110 / 0.160
G14     237.9          54.2                4.0 +/-    2.44       4.8 +/-    2.44  0.070 / 0.100
G18     317.4          18.4                1.5 +/-    2.64       3.5 +/-    2.64  0.070 / 0.120
G20     76.5           47.4                4.5 +/-    0.54       5.9 +/-    0.54  0.040 / 0.030
G21     150.2          31.3                4.6 +/-    0.98       7.8 +/-    0.98  0.040 / 0.030
G24     48.9           20.7                3.3 +/-    2.79       7.1 +/-    2.79  0.040 / 0.020
G27     247.4          27.5                6.7 +/-    3.21      12.3 +/-    3.21  0.030 / 0.040
G31     182.0          13.6                5.2 +/-    1.73      13.4 +/-    1.73  0.100 / 0.070
G32     259.8          70.1                3.6 +/-    0.77       3.8 +/-    0.77  0.130 / 0.100