PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/24-21:28:10
G02     30.8           57.5                9.0 +/-    0.83      10.5 +/-    0.83  0.040 / 0.050
G05     143.2          62.4               10.7 +/-    0.62      11.9 +/-    0.62  0.060 / 0.060
G06     55.2           14.1                7.4 +/-    2.48      18.8 +/-    2.48  0.040 / 0.050
G12     194.7          64.6                9.4 +/-    0.95      10.2 +/-    0.95  0.040 / 0.040
G20     197.8          29.5               13.7 +/-    2.76      24.2 +/-    2.76  0.030 / 0.040
G25     288.3          58.3                7.7 +/-    2.01       8.9 +/-    2.01  0.030 / 0.040
G29     309.3          30.6                9.1 +/-    1.67      15.8 +/-    1.67  0.030 / 0.030