PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-22:57:50
G02     201.0          28.2               15.4 +/-    1.71      28.0 +/-    1.71  0.040 / 0.030
G06     166.7          61.5               13.1 +/-    0.49      14.7 +/-    0.49  0.030 / 0.040
G17     23.5           58.1               10.4 +/-    1.11      12.1 +/-    1.11  0.090 / 0.110
G19     340.0          69.2               10.1 +/-    0.44      10.7 +/-    0.44  0.080 / 0.190
G24     305.2          33.9               10.1 +/-    1.41      16.4 +/-    1.41  0.050 / 0.110
G28     95.4           35.6               11.7 +/-    1.55      18.4 +/-    1.55  0.050 / 0.100