PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/12-21:12:30
G01     224.0          14.7               12.6 +/-    1.85      31.7 +/-    1.85  0.040 / 0.040
G03     274.8          69.9                9.6 +/-    0.56      10.2 +/-    0.56  0.040 / 0.040
G14     89.5           22.5                8.3 +/-    1.40      17.1 +/-    1.40  0.140 / 0.240
G16     146.9          47.5               14.3 +/-    1.02      18.6 +/-    1.02  0.210 / 0.250
G22     209.0          67.8               11.4 +/-    1.40      12.2 +/-    1.40  0.060 / 0.110
G23     309.9          39.8               10.7 +/-    0.64      15.7 +/-    0.64  0.060 / 0.110
G26     92.2           54.9               10.7 +/-    0.68      12.7 +/-    0.68  0.040 / 0.080
G31     46.3           30.0                7.1 +/-    1.29      12.4 +/-    1.29  0.040 / 0.080