PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/15-04:43:10
G02     255.0          79.0                4.6 +/-    0.59       4.7 +/-    0.59  0.050 / 0.020
G05     170.3          18.9                5.0 +/-    1.32      11.3 +/-    1.32  0.060 / 0.040
G06     38.7           60.6                4.1 +/-    0.59       4.6 +/-    0.59  0.040 / 0.040
G12     320.9          52.7                2.5 +/-    1.20       3.1 +/-    1.20  0.030 / 0.040
G17     74.2           18.5                2.4 +/-    1.87       5.6 +/-    1.87  0.100 / 0.100
G19     59.2           37.4                4.3 +/-    1.42       6.5 +/-    1.42  0.070 / 0.120
G24     238.8          32.6                4.8 +/-    2.23       8.0 +/-    2.23  0.060 / 0.070
G25     316.9          17.8                1.0 +/-    1.83       2.2 +/-    1.83  0.060 / 0.050