PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/28-19:27:30
G01     237.9          27.1               10.2 +/-    1.71      19.1 +/-    1.71  0.050 / 0.140
G03     308.8          58.4                9.6 +/-    0.92      11.1 +/-    0.92  0.060 / 0.120
G14     73.0           33.6                8.5 +/-    0.44      13.8 +/-    0.44  0.060 / 0.150
G16     157.9          30.1               13.3 +/-    1.20      23.2 +/-    1.20  0.060 / 0.100
G22     268.8          75.6               10.2 +/-    0.86      10.5 +/-    0.86  0.040 / 0.050
G23     296.9          28.1                5.6 +/-    0.83      10.2 +/-    0.83  0.040 / 0.050
G26     121.5          48.0               11.5 +/-    1.21      14.9 +/-    1.21  0.040 / 0.070
G31     41.0           45.3                6.8 +/-    0.66       9.1 +/-    0.66  0.040 / 0.060
G32     88.4           14.5                8.6 +/-    1.74      21.6 +/-    1.74  0.100 / 0.140