PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/09-04:13:10
G02     200.7          29.5                5.4 +/-    2.07       9.5 +/-    2.07  0.120 / 0.090
G06     171.2          59.6                5.2 +/-    0.49       6.0 +/-    0.49  0.060 / 0.090
G17     28.0           55.4                3.0 +/-    0.85       3.6 +/-    0.85  0.050 / 0.040
G19     346.0          68.7                2.8 +/-    0.52       2.9 +/-    0.52  0.040 / 0.040
G24     305.5          33.5                1.1 +/-    2.36       1.8 +/-    2.36  0.040 / 0.040
G28     96.0           35.0                5.3 +/-    0.99       8.4 +/-    0.99  0.040 / 0.030