PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/17-04:12:30
G02     226.8          70.2                5.0 +/-    0.65       5.3 +/-    0.65  0.320 / 0.530
G06     44.7           71.4                1.9 +/-    0.41       2.0 +/-    0.41  0.370 / 0.670
G12     320.0          42.4                3.0 +/-    0.59       4.2 +/-    0.59  0.050 / 0.040
G17     65.8           24.7                3.4 +/-    0.81       6.6 +/-    0.81  0.040 / 0.050
G19     48.5           43.8                3.6 +/-    0.85       5.0 +/-    0.85  0.060 / 0.070
G24     250.0          38.4                4.4 +/-    1.78       6.6 +/-    1.78  0.070 / 0.090
G28     127.5          9.5                 4.2 +/-    2.63      11.8 +/-    2.63  0.060 / 0.050