PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/15-07:28:10
G01     226.5          18.6                4.9 +/-    1.62      11.3 +/-    1.62  0.030 / 0.040
G03     291.6          67.5                3.8 +/-    0.50       4.1 +/-    0.50  0.030 / 0.040
G14     83.9           26.1                2.8 +/-    1.46       5.3 +/-    1.46  0.040 / 0.040
G16     148.1          42.3                4.7 +/-    0.54       6.6 +/-    0.54  0.040 / 0.050
G22     222.7          71.9                4.0 +/-    0.32       4.2 +/-    0.32  0.230 / 0.440
G23     308.3          39.7                3.6 +/-    1.06       5.2 +/-    1.06  0.380 / 0.350
G26     101.8          53.7                4.1 +/-    0.39       4.9 +/-    0.39  0.090 / 0.160
G31     45.1           32.7                2.6 +/-    0.93       4.4 +/-    0.93  0.090 / 0.170