PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/20-14:43:00
G01     308.6          32.7                4.9 +/-    1.48       8.2 +/-    1.48  0.100 / 0.130
G10     104.4          40.2                6.5 +/-    0.98       9.4 +/-    0.98  0.100 / 0.130
G11     282.2          28.3                3.3 +/-    0.76       6.0 +/-    0.76  0.060 / 0.040
G14     355.6          67.5                4.5 +/-    0.80       4.9 +/-    0.80  0.050 / 0.040
G18     274.9          51.5               10.9 +/-    1.83      13.4 +/-    1.83  0.030 / 0.020
G20     119.5          15.1                8.4 +/-    2.01      20.9 +/-    2.01  0.030 / 0.040
G22     309.8          26.5                4.4 +/-    1.62       8.4 +/-    1.62  0.040 / 0.050
G25     81.2           15.3                8.1 +/-    2.48      20.0 +/-    2.48  0.030 / 0.040
G31     173.2          60.3                7.7 +/-    0.63       8.7 +/-    0.63  0.080 / 0.140
G32     30.1           56.3                5.3 +/-    0.86       6.3 +/-    0.86  0.080 / 0.140