PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-12:43:10
G03     246.3          69.8                6.8 +/-    0.46       7.2 +/-    0.46  0.100 / 0.220
G09     301.2          15.4                4.4 +/-    1.48      10.7 +/-    1.48  0.110 / 0.210
G14     95.0           20.9                6.3 +/-    1.69      13.7 +/-    1.69  0.040 / 0.040
G16     129.7          56.6                7.9 +/-    0.53       9.2 +/-    0.53  0.040 / 0.040
G22     192.2          56.8                7.0 +/-    0.50       8.2 +/-    0.50  0.030 / 0.030
G23     319.5          49.7                5.4 +/-    0.56       6.8 +/-    0.56  0.040 / 0.030
G26     72.6           51.8                5.7 +/-    0.73       7.1 +/-    0.73  0.040 / 0.040
G31     51.0           20.5                5.9 +/-    2.37      12.7 +/-    2.37  0.040 / 0.040