PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-20:28:00
G01     224.0          14.7               12.4 +/-    7.92      31.1 +/-    7.92  0.040 / 0.040
G03     273.4          70.3                8.0 +/-    0.99       8.4 +/-    0.99  0.030 / 0.040
G14     89.4           22.7                8.6 +/-    1.89      17.8 +/-    1.89  0.030 / 0.050
G16     146.1          47.7               12.0 +/-    0.92      15.5 +/-    0.92  0.040 / 0.060
G22     208.1          67.7                9.5 +/-    0.68      10.2 +/-    0.68  0.250 / 0.560
G23     310.2          40.1                7.6 +/-    1.11      11.0 +/-    1.11  0.320 / 0.380
G26     91.5           54.7               10.0 +/-    1.53      11.9 +/-    1.53  0.090 / 0.120
G31     46.4           29.6                7.4 +/-    1.82      13.0 +/-    1.82  0.110 / 0.110