PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-20:42:30
G02     36.1           52.9                9.9 +/-    1.02      12.0 +/-    1.02  0.040 / 0.030
G05     128.6          66.0               10.5 +/-    0.48      11.3 +/-    0.48  0.030 / 0.030
G06     57.1           10.5                7.9 +/-    1.23      21.9 +/-    1.23  0.030 / 0.040
G12     188.6          59.6               10.4 +/-    0.61      11.8 +/-    0.61  0.040 / 0.050
G25     288.1          56.5                4.5 +/-    2.58       5.3 +/-    2.58  0.040 / 0.040
G29     310.2          30.5                9.6 +/-    1.74      16.7 +/-    1.74  0.030 / 0.040