PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/20-17:12:30
G03     219.9          65.2                9.5 +/-    1.16      10.4 +/-    1.16  0.160 / 0.370
G09     304.8          19.5                6.4 +/-    1.83      14.3 +/-    1.83  0.150 / 0.360
G14     101.5          14.6                9.0 +/-    2.59      22.6 +/-    2.59  0.040 / 0.040
G16     119.8          61.2               11.7 +/-    0.43      13.2 +/-    0.43  0.040 / 0.040
G22     189.5          50.2               10.9 +/-    0.86      13.8 +/-    0.86  0.170 / 0.390
G23     324.2          53.9                8.9 +/-    0.63      10.7 +/-    0.63  0.200 / 0.350
G26     63.5           49.1               10.7 +/-    0.68      13.7 +/-    0.68  0.040 / 0.060
G31     54.2           16.1                6.3 +/-    2.30      15.2 +/-    2.30  0.040 / 0.060