PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-23:28:00
G01     126.9          11.9               11.6 +/-    2.76      31.2 +/-    2.76  0.120 / 0.140
G07     52.4           69.6               10.5 +/-    0.25      11.1 +/-    0.25  0.110 / 0.110
G08     51.6           41.6                8.1 +/-    0.92      11.4 +/-    0.92  0.250 / 0.250
G09     179.0          36.9               10.5 +/-    0.72      16.2 +/-    0.72  0.320 / 0.320
G11     121.5          34.7               10.7 +/-    1.04      17.1 +/-    1.04  0.040 / 0.050
G13     321.4          11.1               -1.1 +/-   19.60      -2.9 +/-   19.60  0.050 / 0.050
G17     200.6          13.7                9.3 +/-    2.04      24.0 +/-    2.04  0.080 / 0.280
G28     277.5          53.5               10.4 +/-    3.63      12.6 +/-    3.63  0.260 / 0.270
G30     340.0          64.0                9.8 +/-    0.85      10.7 +/-    0.85  0.030 / 0.030