PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-17:42:30
G01     242.4          30.3               10.2 +/-    1.80      17.7 +/-    1.80  0.040 / 0.030
G03     312.2          55.2                9.1 +/-    1.57      10.8 +/-    1.57  0.030 / 0.030
G14     67.8           37.1                8.9 +/-    1.28      13.5 +/-    1.28  0.090 / 0.140
G16     159.5          25.9               13.0 +/-    1.10      24.9 +/-    1.10  0.090 / 0.170
G22     284.4          74.2                9.5 +/-    0.48       9.8 +/-    0.48  0.030 / 0.040
G23     293.6          25.8                7.9 +/-    1.22      15.2 +/-    1.22  0.030 / 0.040
G26     126.7          44.8               11.2 +/-    0.66      15.2 +/-    0.66  0.050 / 0.100
G31     40.5           49.3                7.8 +/-    0.44       9.9 +/-    0.44  0.050 / 0.100
G32     84.7           17.1                9.4 +/-    0.98      22.3 +/-    0.98  0.070 / 0.110