PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/18-21:43:00
G01     228.3          19.3                9.4 +/-    1.54      21.0 +/-    1.54  0.150 / 0.270
G03     294.4          65.8                7.9 +/-    1.42       8.5 +/-    1.42  0.180 / 0.340
G14     84.2           25.4                9.9 +/-    1.24      19.2 +/-    1.24  0.040 / 0.040
G16     150.1          41.3               11.3 +/-    1.23      16.1 +/-    1.23  0.040 / 0.040
G22     226.0          72.6                9.7 +/-    0.81      10.1 +/-    0.81  0.040 / 0.090
G23     304.0          33.4               10.8 +/-    1.42      17.7 +/-    1.42  0.050 / 0.090
G26     107.4          53.9               10.7 +/-    0.57      12.9 +/-    0.57  0.100 / 0.220
G31     43.1           38.6                6.3 +/-    0.79       9.4 +/-    0.79  0.090 / 0.180