PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-13:12:30
G03     230.1          66.9                7.8 +/-    0.66       8.4 +/-    0.66  0.110 / 0.210
G09     304.4          19.4                5.2 +/-    1.78      11.6 +/-    1.78  0.150 / 0.240
G14     99.7           17.3                6.3 +/-    1.91      14.9 +/-    1.91  0.040 / 0.060
G16     119.3          60.5                8.6 +/-    0.50       9.7 +/-    0.50  0.040 / 0.060
G22     188.8          50.5                8.8 +/-    0.76      11.0 +/-    0.76  0.030 / 0.030
G23     324.7          54.4                6.6 +/-    0.54       8.0 +/-    0.54  0.040 / 0.040
G26     64.3           49.1                6.4 +/-    0.67       8.2 +/-    0.67  0.030 / 0.030
G31     53.8           16.3                6.4 +/-    3.51      15.3 +/-    3.51  0.050 / 0.040