PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/14-04:12:30
G02     203.0          38.5                7.1 +/-    2.43      10.6 +/-    2.43  0.050 / 0.140
G06     163.3          69.5                5.7 +/-    1.11       6.1 +/-    1.11  0.060 / 0.150
G12     308.3          15.4                1.4 +/-    2.77       3.5 +/-    2.77  0.030 / 0.050
G17     36.5           49.0                2.2 +/-    0.24       2.8 +/-    0.24  0.030 / 0.040
G19     6.2            63.9                2.7 +/-    0.58       3.0 +/-    0.58  0.030 / 0.040
G24     296.8          38.4                4.1 +/-    0.79       6.1 +/-    0.79  0.030 / 0.030
G28     104.7          29.4                4.4 +/-    0.75       7.8 +/-    0.75  0.130 / 0.320