PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-19:58:00
G07     135.1          27.9               14.9 +/-    0.68      27.3 +/-    0.68  0.070 / 0.180
G11     55.1           32.4               10.3 +/-    0.75      17.2 +/-    0.75  0.070 / 0.210
G13     278.0          38.6               15.6 +/-    0.98      23.3 +/-    0.98  0.030 / 0.040
G15     304.7          14.9                9.8 +/-    3.18      24.5 +/-    3.18  0.030 / 0.040
G17     226.7          66.6               16.4 +/-    0.94      17.7 +/-    0.94  0.080 / 0.130
G18     50.0           18.5                9.0 +/-    1.24      20.5 +/-    1.24  0.100 / 0.110
G19     221.0          39.2               17.8 +/-    0.92      26.2 +/-    0.92  0.070 / 0.100
G28     4.1            61.1               12.3 +/-    0.54      13.9 +/-    0.54  0.070 / 0.100
G30     131.9          63.2               14.4 +/-    0.48      16.0 +/-    0.48  0.120 / 0.320