PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/19-06:27:50
G02     41.8           47.5                2.6 +/-    0.81       3.4 +/-    0.81  0.040 / 0.040
G05     116.5          68.1                5.9 +/-    0.62       6.3 +/-    0.62  0.030 / 0.040
G06     57.2           13.6                0.9 +/-    2.27       2.4 +/-    2.27  0.030 / 0.030
G12     194.3          59.7                6.8 +/-    0.65       7.7 +/-    0.65  0.030 / 0.030
G25     275.8          59.5                5.3 +/-    1.84       6.0 +/-    1.84  0.090 / 0.250
G29     316.0          38.8                2.7 +/-    0.66       4.0 +/-    0.66  0.080 / 0.200