PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/17-04:28:00
G02     36.7           51.9                5.9 +/-    0.78       7.3 +/-    0.78  0.040 / 0.040
G05     130.7          64.8                7.2 +/-    0.47       7.9 +/-    0.47  0.030 / 0.040
G06     53.7           17.7                3.0 +/-    1.81       7.1 +/-    1.81  0.070 / 0.130
G12     200.4          66.6                6.9 +/-    0.41       7.5 +/-    0.41  0.080 / 0.100
G25     289.5          56.8                3.3 +/-    2.03       3.9 +/-    2.03  0.030 / 0.030
G29     312.4          35.3                5.1 +/-    0.78       8.1 +/-    0.78  0.030 / 0.030