PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/13-21:12:30
G01     222.7          13.4               12.8 +/-    2.23      33.1 +/-    2.23  0.040 / 0.050
G03     268.7          70.3               12.5 +/-    0.56      13.2 +/-    0.56  0.030 / 0.050
G14     91.1           21.4                9.8 +/-    1.47      20.8 +/-    1.47  0.040 / 0.080
G16     145.0          49.3               15.0 +/-    0.96      19.1 +/-    0.96  0.040 / 0.070
G22     205.9          66.1               13.7 +/-    0.82      14.9 +/-    0.82  0.200 / 0.390
G23     311.3          41.1               12.1 +/-    0.92      17.3 +/-    0.92  0.250 / 0.440
G26     88.6           54.9               10.9 +/-    0.34      13.0 +/-    0.34  0.040 / 0.100
G31     47.1           28.4                7.4 +/-    0.60      13.4 +/-    0.60  0.050 / 0.110