PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-00:57:50
G02     37.2           51.9               10.9 +/-    0.86      13.4 +/-    0.86  0.030 / 0.040
G05     128.0          65.4               12.5 +/-    0.15      13.6 +/-    0.15  0.050 / 0.040
G06     56.2           12.3                8.0 +/-    1.81      21.2 +/-    1.81  0.030 / 0.030
G12     193.8          63.0               13.2 +/-    0.48      14.6 +/-    0.48  0.030 / 0.020
G25     291.6          55.1                9.9 +/-    1.58      11.8 +/-    1.58  0.040 / 0.040
G29     309.6          30.0               10.1 +/-    1.30      17.7 +/-    1.30  0.040 / 0.050