PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/02-21:57:30
G02     32.4           56.0                8.7 +/-    0.85      10.3 +/-    0.85  0.030 / 0.030
G05     137.6          62.5               10.3 +/-    0.32      11.5 +/-    0.32  0.030 / 0.030
G06     54.4           14.3                7.9 +/-    2.58      19.8 +/-    2.58  0.040 / 0.030
G12     193.4          65.9                9.2 +/-    0.72      10.0 +/-    0.72  0.030 / 0.030
G19     99.4           11.7               10.2 +/-    0.71      27.4 +/-    0.71  0.050 / 0.140
G25     296.6          53.6                8.8 +/-    2.32      10.7 +/-    2.32  0.050 / 0.130
G29     306.9          27.0                9.3 +/-    2.45      17.4 +/-    2.45  0.180 / 0.170