PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-20:42:40
G02     36.1           52.9                8.2 +/-    0.46       9.9 +/-    0.46  0.030 / 0.040
G05     128.6          66.0                9.4 +/-    0.67      10.2 +/-    0.67  0.040 / 0.040
G06     57.1           10.5                7.5 +/-    2.18      20.8 +/-    2.18  0.040 / 0.050
G12     188.6          59.6                9.1 +/-    1.22      10.4 +/-    1.22  0.030 / 0.050
G25     288.1          56.5                7.8 +/-    1.17       9.2 +/-    1.17  0.040 / 0.050
G29     310.2          30.5                7.6 +/-    1.51      13.2 +/-    1.51  0.040 / 0.060