PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-20:28:00
G03     227.0          66.3               13.5 +/-    0.83      14.6 +/-    0.83  0.050 / 0.050
G09     304.5          19.0               11.4 +/-    2.14      25.8 +/-    2.14  0.040 / 0.060
G14     101.5          13.7               13.1 +/-    1.46      33.6 +/-    1.46  0.120 / 0.370
G16     125.1          60.7               15.1 +/-    0.57      17.0 +/-    0.57  0.110 / 0.330
G22     192.6          52.6               14.6 +/-    1.05      17.8 +/-    1.05  0.260 / 0.320
G23     321.8          51.6               11.6 +/-    0.41      14.4 +/-    0.41  0.170 / 0.190
G26     65.7           50.5               11.2 +/-    1.10      14.0 +/-    1.10  0.030 / 0.030
G31     53.5           17.8                9.1 +/-    4.34      21.2 +/-    4.34  0.040 / 0.040