PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-19:12:30
G03     225.7          66.5               13.1 +/-    0.63      14.2 +/-    0.63  0.040 / 0.060
G09     304.1          18.5               11.7 +/-    2.11      26.7 +/-    2.11  0.050 / 0.050
G14     100.8          14.5               13.2 +/-    2.37      33.3 +/-    2.37  0.030 / 0.040
G16     124.7          60.4               15.6 +/-    0.68      17.7 +/-    0.68  0.040 / 0.030
G22     192.0          52.7               13.7 +/-    0.51      16.8 +/-    0.51  0.310 / 0.210
G23     321.9          51.7               13.8 +/-    0.78      17.0 +/-    0.78  0.290 / 0.140
G26     65.9           50.4               13.2 +/-    1.12      16.5 +/-    1.12  0.090 / 0.270
G31     53.3           17.7               10.2 +/-    3.93      23.7 +/-    3.93  0.110 / 0.340