PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-01:42:10
G02     34.4           53.9                7.0 +/-    0.27       8.4 +/-    0.27  0.040 / 0.060
G05     134.9          63.1                9.2 +/-    0.41      10.2 +/-    0.41  0.050 / 0.050
G06     53.0           17.6                6.2 +/-    0.71      14.4 +/-    0.71  0.030 / 0.040
G12     203.9          69.2                8.1 +/-    0.81       8.6 +/-    0.81  0.030 / 0.040
G25     295.0          54.5                6.5 +/-    0.94       7.8 +/-    0.94  0.030 / 0.090
G29     309.8          32.1                6.6 +/-    0.93      11.1 +/-    0.93  0.030 / 0.040