PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-19:57:30
G03     227.4          66.6               10.8 +/-    0.31      11.7 +/-    0.31  0.040 / 0.040
G09     304.1          18.5                9.2 +/-    1.65      21.0 +/-    1.65  0.040 / 0.050
G14     100.9          14.2               10.4 +/-    1.84      26.5 +/-    1.84  0.180 / 0.220
G16     125.6          60.3               11.1 +/-    0.34      12.6 +/-    0.34  0.330 / 0.170
G22     192.6          53.0               11.5 +/-    0.88      14.0 +/-    0.88  0.030 / 0.040
G23     321.5          51.3                9.9 +/-    0.60      12.3 +/-    0.60  0.030 / 0.040
G26     66.3           50.7                8.8 +/-    1.23      11.0 +/-    1.23  0.180 / 0.390
G31     53.2           18.0                7.7 +/-    4.07      17.7 +/-    4.07  0.140 / 0.340