PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/18-23:57:50
G01     61.2           30.9               13.3 +/-    1.01      22.9 +/-    1.01  0.060 / 0.070
G06     181.0          13.5               24.1 +/-   21.85      62.1 +/-   21.85  0.050 / 0.080
G07     141.9          23.6               18.7 +/-    2.17      37.7 +/-    2.17  0.350 / 0.300
G11     49.9           26.7               10.5 +/-    2.42      19.7 +/-    2.42  0.230 / 0.200
G13     264.4          35.4               18.1 +/-    1.82      28.5 +/-    1.82  0.040 / 0.040
G15     294.2          16.6               12.7 +/-    1.33      30.4 +/-    1.33  0.040 / 0.050
G17     250.6          72.8               15.8 +/-    0.49      16.4 +/-    0.49  0.030 / 0.030
G19     231.8          49.7               17.5 +/-    2.42      22.2 +/-    2.42  0.030 / 0.030
G28     35.1           56.7               15.7 +/-    0.65      18.4 +/-    0.65  0.110 / 0.160
G30     142.4          50.1               17.9 +/-    0.78      22.6 +/-    0.78  0.110 / 0.160