PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-13:58:00
G01     237.3          26.7                7.9 +/-    2.00      15.0 +/-    2.00  0.060 / 0.140
G03     307.8          59.8                7.5 +/-    0.93       8.5 +/-    0.93  0.070 / 0.160
G14     71.9           35.6                7.8 +/-    0.68      12.2 +/-    0.68  0.050 / 0.130
G16     154.9          32.2                9.6 +/-    1.07      16.1 +/-    1.07  0.050 / 0.130
G18     212.4          17.1                8.8 +/-    2.09      20.7 +/-    2.09  0.040 / 0.040
G22     246.5          77.7                8.6 +/-    0.35       8.8 +/-    0.35  0.040 / 0.050
G23     299.3          31.8                6.4 +/-    1.43      10.8 +/-    1.43  0.090 / 0.160
G26     117.6          48.6               10.2 +/-    1.63      13.1 +/-    1.63  0.090 / 0.130
G31     41.7           42.7                7.7 +/-    0.68      10.8 +/-    0.68  0.080 / 0.140
G32     89.4           13.1                7.8 +/-    1.27      20.4 +/-    1.27  0.070 / 0.130