PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/30-22:42:10
G02     201.2          28.8               15.5 +/-    1.70      27.9 +/-    1.70  0.040 / 0.030
G06     166.1          62.2               13.9 +/-    0.48      15.5 +/-    0.48  0.030 / 0.040
G17     24.5           57.5               10.6 +/-    1.07      12.3 +/-    1.07  0.060 / 0.140
G19     341.5          68.9               10.0 +/-    0.65      10.6 +/-    0.65  0.100 / 0.130
G24     304.6          34.4               10.0 +/-    1.88      16.1 +/-    1.88  0.060 / 0.080
G28     96.0           35.2               12.2 +/-    0.93      19.3 +/-    0.93  0.040 / 0.090