PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-20:58:00
G03     231.0          67.2                9.2 +/-    0.47       9.9 +/-    0.47  0.050 / 0.050
G09     303.8          18.1                7.6 +/-    1.15      17.4 +/-    1.15  0.040 / 0.050
G14     100.6          14.3                9.5 +/-    2.15      24.2 +/-    2.15  0.030 / 0.040
G16     128.2          59.8               11.0 +/-    0.78      12.6 +/-    0.78  0.030 / 0.040
G22     193.7          54.1               10.0 +/-    0.37      12.1 +/-    0.37  0.210 / 0.190
G23     320.5          50.4                8.5 +/-    0.75      10.6 +/-    0.75  0.230 / 0.260
G26     67.7           51.4                8.7 +/-    1.20      10.8 +/-    1.20  0.050 / 0.060
G31     52.7           19.0                6.5 +/-    3.40      14.6 +/-    3.40  0.050 / 0.050