PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-18:28:00
G01     246.1          32.6                9.0 +/-    1.17      14.9 +/-    1.17  0.040 / 0.040
G03     314.3          50.9                8.1 +/-    0.96      10.0 +/-    0.96  0.040 / 0.030
G14     64.3           39.0                7.2 +/-    0.61      10.7 +/-    0.61  0.040 / 0.040
G16     161.7          22.1               10.9 +/-    1.77      22.8 +/-    1.77  0.040 / 0.040
G22     295.6          71.1                8.4 +/-    0.66       8.9 +/-    0.66  0.120 / 0.260
G23     290.6          23.1                8.3 +/-    0.72      17.0 +/-    0.72  0.090 / 0.200
G26     131.4          41.9                9.2 +/-    0.49      13.0 +/-    0.49  0.050 / 0.110
G31     40.3           53.4                7.3 +/-    0.46       8.9 +/-    0.46  0.050 / 0.090
G32     81.6           19.6                7.9 +/-    1.22      17.7 +/-    1.22  0.090 / 0.140