PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-18:27:30
G03     233.2          68.9               10.2 +/-    1.07      10.8 +/-    1.07  0.040 / 0.070
G09     302.0          15.8                7.4 +/-    1.87      18.1 +/-    1.87  0.060 / 0.060
G14     97.8           17.1               11.4 +/-    2.13      27.0 +/-    2.13  0.030 / 0.050
G16     130.6          57.7               14.4 +/-    0.42      16.7 +/-    0.42  0.030 / 0.050
G22     193.7          56.2               14.1 +/-    1.24      16.6 +/-    1.24  0.100 / 0.200
G23     319.2          49.2                9.6 +/-    0.43      12.3 +/-    0.43  0.100 / 0.190
G26     71.2           52.0               11.6 +/-    0.59      14.3 +/-    0.59  0.110 / 0.470
G31     51.5           20.2                7.1 +/-    1.67      15.5 +/-    1.67  0.110 / 0.510