PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-08:27:50
G02     35.7           53.5                3.7 +/-    1.24       4.5 +/-    1.24  0.020 / 0.030
G05     136.9          62.5                6.9 +/-    0.56       7.7 +/-    0.56  0.030 / 0.030
G06     53.0           18.7                2.8 +/-    3.28       6.4 +/-    3.28  0.030 / 0.030
G12     203.2          68.7                6.2 +/-    0.33       6.6 +/-    0.33  0.020 / 0.030
G20     200.4          22.4                6.1 +/-    2.16      12.6 +/-    2.16  0.210 / 0.250
G25     297.4          53.1                3.7 +/-    2.52       4.5 +/-    2.52  0.360 / 0.260
G29     308.5          29.9                3.1 +/-    1.52       5.5 +/-    1.52  0.030 / 0.060