PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/01-21:42:40
G02     201.5          29.5               15.3 +/-    1.63      27.0 +/-    1.63  0.060 / 0.100
G06     169.3          61.2               13.7 +/-    0.80      15.4 +/-    0.80  0.070 / 0.110
G17     31.0           53.0               10.7 +/-    0.65      13.0 +/-    0.65  0.050 / 0.100
G19     348.9          68.2               10.1 +/-    0.86      10.7 +/-    0.86  0.040 / 0.090
G24     302.5          35.7               11.1 +/-    0.99      17.4 +/-    0.99  0.030 / 0.030
G28     94.1           38.6               11.0 +/-    0.82      16.3 +/-    0.82  0.030 / 0.030