PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/14-14:27:30
G02     215.8          53.9                8.7 +/-    0.85      10.5 +/-    0.85  0.040 / 0.050
G06     60.9           74.7                9.1 +/-    0.47       9.4 +/-    0.47  0.040 / 0.050
G12     318.9          37.8                4.7 +/-    0.66       7.2 +/-    0.66  0.040 / 0.060
G17     56.8           32.1                6.5 +/-    0.63      10.9 +/-    0.63  0.050 / 0.070
G19     31.1           53.8                7.3 +/-    0.62       8.8 +/-    0.62  0.060 / 0.140
G24     264.4          42.5                6.0 +/-    1.15       8.4 +/-    1.15  0.050 / 0.140
G28     121.2          15.7                7.8 +/-    1.19      19.0 +/-    1.19  0.030 / 0.030