PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/16-21:57:50
G02     54.0           37.8               11.1 +/-    1.43      16.7 +/-    1.43  0.030 / 0.030
G05     68.5           65.5               13.3 +/-    0.75      14.4 +/-    0.75  0.030 / 0.030
G12     183.5          36.7               16.4 +/-    1.02      25.3 +/-    1.02  0.270 / 0.400
G13     132.6          11.2               16.6 +/-    4.04      45.0 +/-    4.04  0.170 / 0.360
G21     266.3          12.8               17.2 +/-    4.78      45.1 +/-    4.78  0.180 / 0.430
G25     246.1          55.5               12.7 +/-    1.50      15.0 +/-    1.50  0.180 / 0.430
G29     323.6          47.8               11.8 +/-    0.44      15.3 +/-    0.44  0.040 / 0.040