PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-22:28:10
G02     213.7          58.0               18.1 +/-    0.74      20.9 +/-    0.74  0.070 / 0.090
G06     64.3           75.8               15.8 +/-    0.84      16.2 +/-    0.84  0.070 / 0.080
G12     317.9          34.3               13.1 +/-    0.91      21.1 +/-    0.91  0.050 / 0.090
G17     53.3           36.5               13.7 +/-    0.44      21.1 +/-    0.44  0.060 / 0.110
G19     34.3           52.1               15.3 +/-    0.50      18.9 +/-    0.50  0.100 / 0.230
G24     268.7          42.1               16.9 +/-    0.77      23.8 +/-    0.77  0.090 / 0.280
G28     120.9          15.4               18.0 +/-    3.46      44.4 +/-    3.46  0.040 / 0.050