PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-17:27:50
G01     249.4          34.4                9.4 +/-    1.06      15.1 +/-    1.06  0.030 / 0.040
G03     315.3          48.7                6.9 +/-    1.12       8.9 +/-    1.12  0.040 / 0.040
G11     238.7          11.9                9.1 +/-    3.29      24.2 +/-    3.29  0.040 / 0.050
G14     60.8           41.1                8.2 +/-    1.24      11.8 +/-    1.24  0.040 / 0.040
G16     162.6          19.6               -4.0 +/-   20.19      -9.0 +/-   20.19  0.110 / 0.410
G22     300.9          69.2                8.7 +/-    1.63       9.2 +/-    1.63  0.100 / 0.300
G23     288.5          21.6                7.9 +/-    1.67      16.7 +/-    1.67  0.050 / 0.090
G26     134.0          39.6               11.2 +/-    1.04      16.3 +/-    1.04  0.050 / 0.110
G31     40.7           56.0                7.2 +/-    0.59       8.5 +/-    0.59  0.070 / 0.100
G32     79.1           21.2                8.1 +/-    1.44      17.4 +/-    1.44  0.070 / 0.100