PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/18-04:12:30
G02     230.1          72.0                4.8 +/-    0.31       5.0 +/-    0.31  0.050 / 0.040
G05     173.6          11.7               -0.8 +/-   12.29      -2.0 +/-   12.29  0.050 / 0.050
G06     42.8           69.6                3.9 +/-    0.78       4.1 +/-    0.78  0.050 / 0.080
G12     320.4          44.1                2.4 +/-    0.47       3.3 +/-    0.47  0.060 / 0.090
G17     67.3           23.6                4.3 +/-    1.50       8.6 +/-    1.50  0.040 / 0.050
G19     50.5           42.6                3.8 +/-    1.18       5.4 +/-    1.18  0.030 / 0.040
G24     247.9          37.5                5.6 +/-    0.84       8.5 +/-    0.84  0.210 / 0.450