PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/16-12:27:30
G01     229.8          20.3                4.8 +/-    1.52      10.5 +/-    1.52  0.060 / 0.150
G03     295.0          66.1                3.7 +/-    0.64       4.0 +/-    0.64  0.070 / 0.160
G14     80.2           31.0                5.9 +/-    0.78      10.2 +/-    0.78  0.030 / 0.030
G16     148.3          41.6                7.2 +/-    0.65      10.2 +/-    0.65  0.030 / 0.030
G18     206.7          10.4                4.8 +/-   13.28      13.3 +/-   13.28  0.040 / 0.090
G22     213.6          72.7                6.7 +/-    0.50       7.0 +/-    0.50  0.050 / 0.090
G23     306.5          38.0                3.3 +/-    0.94       4.9 +/-    0.94  0.030 / 0.050
G26     102.1          52.7                6.1 +/-    0.49       7.5 +/-    0.49  0.030 / 0.050
G31     44.3           34.0                4.3 +/-    0.58       6.9 +/-    0.58  0.040 / 0.040