PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-14:58:00
G03     243.1          70.2                8.4 +/-    0.60       8.9 +/-    0.60  0.080 / 0.190
G09     300.7          14.5                5.6 +/-    1.66      14.1 +/-    1.66  0.080 / 0.240
G14     95.1           20.2                8.4 +/-    0.71      18.4 +/-    0.71  0.050 / 0.080
G16     131.7          56.1               10.7 +/-    0.48      12.6 +/-    0.48  0.040 / 0.080
G22     191.0          56.6               10.3 +/-    1.50      12.1 +/-    1.50  0.030 / 0.050
G23     319.3          49.5                6.6 +/-    0.88       8.3 +/-    0.88  0.040 / 0.040
G26     73.8           52.2                9.1 +/-    0.37      11.2 +/-    0.37  0.040 / 0.040
G31     50.7           21.2                4.6 +/-    0.85       9.8 +/-    0.85  0.040 / 0.060