PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-13:27:50
G01     222.4          13.9                4.7 +/-    3.90      12.0 +/-    3.90  0.040 / 0.040
G03     259.0          72.7                6.8 +/-    0.89       7.1 +/-    0.89  0.040 / 0.040
G14     90.6           20.7                7.3 +/-    1.89      15.7 +/-    1.89  0.200 / 0.390
G16     146.9          47.3                9.3 +/-    0.70      12.1 +/-    0.70  0.280 / 0.430
G22     197.8          63.8                7.4 +/-    0.73       8.2 +/-    0.73  0.030 / 0.050
G23     310.9          40.9                5.8 +/-    1.09       8.4 +/-    1.09  0.040 / 0.050
G26     93.1           55.5                7.8 +/-    0.99       9.3 +/-    0.99  0.110 / 0.260
G31     47.1           28.8                4.4 +/-    0.92       7.8 +/-    0.92  0.120 / 0.250