PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-21:13:10
G01     44.1           20.3               11.8 +/-    2.78      25.8 +/-    2.78  0.260 / 0.370
G06     177.8          30.3               14.1 +/-    1.20      24.5 +/-    1.20  0.180 / 0.210
G13     242.1          26.4               15.0 +/-    1.65      28.5 +/-    1.65  0.060 / 0.090
G15     275.6          14.2               12.8 +/-    1.40      32.6 +/-    1.40  0.050 / 0.090
G17     348.8          74.8               13.4 +/-    0.48      13.8 +/-    0.48  0.040 / 0.060
G19     260.9          65.9               15.1 +/-    1.04      16.4 +/-    1.04  0.050 / 0.060
G24     317.7          15.1               11.2 +/-    2.21      27.8 +/-    2.21  0.080 / 0.110
G28     58.0           52.7               11.7 +/-    0.97      14.2 +/-    0.97  0.080 / 0.110
G30     152.3          32.0               12.8 +/-    1.07      21.6 +/-    1.07  0.080 / 0.210