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               20.1 +/-    1.81      47.0 +/-    1.81  0.050 / 0.090
G06     173.5          48.5               17.0 +/-    0.98      21.9 +/-    0.98  0.050 / 0.080
G13     228.7          15.6               17.5 +/-    1.72      42.9 +/-    1.72  0.070 / 0.180
G17     17.7           62.5               14.8 +/-    0.88      16.5 +/-    0.88  0.070 / 0.150
G19     312.5          71.7               14.9 +/-    0.66      15.6 +/-    0.66  0.060 / 0.180
G24     311.5          27.7               11.9 +/-    1.22      22.0 +/-    1.22  0.140 / 0.210
G28     80.2           45.4               14.9 +/-    0.71      19.9 +/-    0.71  0.040 / 0.080
G30     155.9          15.5               19.3 +/-    3.39      47.3 +/-    3.39  0.040 / 0.060