PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-13:28:00
G03     231.1          67.2                6.4 +/-    0.86       6.9 +/-    0.86  0.120 / 0.280
G09     304.1          18.9                5.9 +/-    1.23      13.2 +/-    1.23  0.120 / 0.390
G14     99.3           17.6                7.0 +/-    1.42      16.4 +/-    1.42  0.040 / 0.060
G16     120.7          60.2                9.1 +/-    0.83      10.3 +/-    0.83  0.040 / 0.060
G22     188.8          51.0                7.7 +/-    1.06       9.6 +/-    1.06  0.040 / 0.050
G23     324.4          54.1                6.3 +/-    0.96       7.6 +/-    0.96  0.040 / 0.050
G26     65.1           49.5                5.3 +/-    0.85       6.8 +/-    0.85  0.030 / 0.040
G31     53.5           16.7                5.2 +/-    1.71      12.5 +/-    1.71  0.040 / 0.060