PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/12-14:28:00
G03     306.9          60.8                9.5 +/-    1.10      10.7 +/-    1.10  0.070 / 0.090
G14     72.7           35.0                9.0 +/-    0.66      14.3 +/-    0.66  0.070 / 0.090
G16     154.8          32.7               11.7 +/-    1.21      19.3 +/-    1.21  0.090 / 0.130
G18     212.0          16.7               11.2 +/-    2.60      26.6 +/-    2.60  0.050 / 0.130
G22     245.8          77.5               11.5 +/-    0.28      11.7 +/-    0.28  0.080 / 0.100
G23     299.6          31.9               10.2 +/-    2.46      17.2 +/-    2.46  0.070 / 0.110
G26     116.9          49.0               11.2 +/-    1.29      14.3 +/-    1.29  0.040 / 0.040
G31     41.8           42.2                7.4 +/-    1.18      10.3 +/-    1.18  0.040 / 0.040
G32     89.8           12.7                9.5 +/-    2.93      24.8 +/-    2.93  0.030 / 0.050