PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-20:28:00
G02     199.7          17.6               18.9 +/-    2.94      44.1 +/-    2.94  0.070 / 0.070
G06     173.5          48.5               17.4 +/-    0.82      22.4 +/-    0.82  0.050 / 0.080
G13     228.7          15.6               18.7 +/-    1.68      45.8 +/-    1.68  0.080 / 0.150
G17     17.7           62.5               14.9 +/-    0.84      16.5 +/-    0.84  0.090 / 0.120
G19     312.5          71.7               14.5 +/-    0.52      15.2 +/-    0.52  0.110 / 0.300
G24     311.5          27.7               11.6 +/-    1.60      21.3 +/-    1.60  0.230 / 0.260
G28     80.2           45.4               15.1 +/-    0.67      20.3 +/-    0.67  0.220 / 0.340
G30     155.9          15.5               18.5 +/-    3.43      45.4 +/-    3.43  0.110 / 0.380