PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-19:42:50
G01     240.1          28.7               10.8 +/-    1.42      19.4 +/-    1.42  0.030 / 0.040
G03     311.0          55.9                8.9 +/-    0.67      10.6 +/-    0.67  0.030 / 0.040
G14     70.7           35.0                8.0 +/-    1.04      12.7 +/-    1.04  0.030 / 0.060
G16     159.3          27.6               12.9 +/-    1.77      23.7 +/-    1.77  0.030 / 0.060
G22     279.0          74.5                9.4 +/-    0.64       9.7 +/-    0.64  0.080 / 0.170
G23     295.0          26.4                9.7 +/-    2.51      18.4 +/-    2.51  0.080 / 0.180
G26     125.0          46.3               12.5 +/-    0.84      16.6 +/-    0.84  0.070 / 0.160
G31     40.5           47.9                7.4 +/-    0.39       9.6 +/-    0.39  0.080 / 0.140
G32     86.4           16.1                8.8 +/-    0.82      21.2 +/-    0.82  0.050 / 0.160