PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-04:27:50
G01     308.5          33.3                6.3 +/-    1.44      10.3 +/-    1.44  0.070 / 0.160
G10     104.0          39.9                7.3 +/-    0.71      10.6 +/-    0.71  0.090 / 0.170
G11     284.4          27.3                5.2 +/-    0.74       9.7 +/-    0.74  0.040 / 0.050
G14     349.9          68.3                6.2 +/-    0.63       6.6 +/-    0.63  0.040 / 0.050
G18     279.5          50.1               10.2 +/-    1.22      12.9 +/-    1.22  0.090 / 0.130
G20     119.3          15.9                5.7 +/-    2.08      13.9 +/-    2.08  0.090 / 0.150
G22     309.3          24.0                7.5 +/-    2.60      14.9 +/-    2.60  0.060 / 0.060
G25     85.3           15.6                5.2 +/-    1.33      12.6 +/-    1.33  0.080 / 0.080
G31     165.2          63.5                9.3 +/-    0.51      10.3 +/-    0.51  0.040 / 0.050
G32     32.2           55.1                5.6 +/-    0.82       6.6 +/-    0.82  0.040 / 0.060