PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/16-04:13:10
G02     55.6           35.4                4.6 +/-    1.33       7.2 +/-    1.33  0.060 / 0.040
G05     66.9           64.3                5.1 +/-    0.51       5.6 +/-    0.51  0.050 / 0.030
G12     186.6          39.6                6.7 +/-    0.76       9.8 +/-    0.76  0.040 / 0.010
G13     133.2          11.0                3.5 +/-   12.24       9.5 +/-   12.24  0.040 / 0.010
G20     213.5          25.8                6.5 +/-    2.22      12.5 +/-    2.22  0.140 / 0.260
G21     266.5          13.7                6.4 +/-    2.30      16.5 +/-    2.30  0.080 / 0.160
G25     248.7          55.5                6.5 +/-    1.98       7.7 +/-    1.98  0.180 / 0.240
G29     324.2          48.6                4.6 +/-    0.37       5.9 +/-    0.37  0.210 / 0.270