PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/16-21:57:40
G02     54.0           37.8               10.9 +/-    0.71      16.5 +/-    0.71  0.030 / 0.040
G05     68.5           65.5               11.5 +/-    0.58      12.5 +/-    0.58  0.040 / 0.040
G12     183.5          36.7               16.2 +/-    1.64      25.0 +/-    1.64  0.060 / 0.060
G13     132.6          11.2                4.1 +/-   36.97      11.1 +/-   36.97  0.040 / 0.070
G21     266.3          12.8               16.1 +/-    4.84      42.1 +/-    4.84  0.230 / 0.460
G25     246.1          55.5               14.0 +/-    1.26      16.5 +/-    1.26  0.140 / 0.320
G29     323.6          47.8               11.8 +/-    1.14      15.3 +/-    1.14  0.180 / 0.390