PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-23:12:40
G02     245.2          77.2               13.9 +/-    0.29      14.2 +/-    0.29  0.050 / 0.030
G05     170.5          17.7               21.9 +/-    1.95      51.0 +/-    1.95  0.050 / 0.040
G06     40.6           56.6               13.6 +/-    0.57      16.0 +/-    0.57  0.120 / 0.160
G12     321.7          53.6               13.8 +/-    0.80      16.7 +/-    0.80  0.160 / 0.130
G17     70.4           24.3               13.4 +/-    2.65      26.6 +/-    2.65  0.330 / 0.260
G19     56.9           39.3               14.3 +/-    1.41      21.1 +/-    1.41  0.420 / 0.360
G24     243.9          34.2               18.8 +/-    2.77      30.3 +/-    2.77  0.060 / 0.040
G25     316.8          12.5                6.8 +/-   23.57      17.9 +/-   23.57  0.070 / 0.050