PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-03:27:40
G02     37.6           51.6                6.9 +/-    0.96       8.5 +/-    0.96  0.030 / 0.010
G05     128.6          65.0                7.6 +/-    0.38       8.2 +/-    0.38  0.040 / 0.020
G06     55.6           13.6                5.0 +/-    1.64      12.8 +/-    1.64  0.040 / 0.010
G12     196.6          64.6                7.4 +/-    0.75       8.1 +/-    0.75  0.040 / 0.010
G25     293.0          54.6                8.1 +/-    1.76       9.7 +/-    1.76  0.050 / 0.020
G29     309.5          30.2                6.1 +/-    0.82      10.7 +/-    0.82  0.040 / 0.020