PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-14:27:50
G03     240.5          69.6               13.0 +/-    0.53      13.7 +/-    0.53  0.030 / 0.040
G09     301.5          15.5                8.7 +/-    1.85      21.5 +/-    1.85  0.030 / 0.040
G14     96.0           19.7               10.0 +/-    1.64      22.1 +/-    1.64  0.100 / 0.210
G16     129.3          57.1               13.4 +/-    0.47      15.6 +/-    0.47  0.120 / 0.230
G22     189.5          54.9               13.1 +/-    0.62      15.6 +/-    0.62  0.040 / 0.060
G23     320.7          50.9               11.5 +/-    1.18      14.4 +/-    1.18  0.040 / 0.060
G26     71.7           51.7               10.4 +/-    0.69      12.9 +/-    0.69  0.050 / 0.060
G31     51.3           20.1                8.7 +/-    1.69      19.0 +/-    1.69  0.050 / 0.050