PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-13:27:50
G01     221.1          12.6                5.1 +/-    4.02      13.4 +/-    4.02  0.040 / 0.050
G03     252.0          72.5                8.7 +/-    0.74       9.1 +/-    0.74  0.040 / 0.050
G09     297.3          10.5              -10.6 +/-   31.66     -29.2 +/-   31.66  0.140 / 0.460
G14     92.1           19.6                7.6 +/-    1.17      16.9 +/-    1.17  0.100 / 0.520
G16     145.0          49.2               10.3 +/-    1.52      13.1 +/-    1.52  0.040 / 0.040
G22     196.1          62.0               10.4 +/-    0.49      11.6 +/-    0.49  0.040 / 0.040
G23     312.3          42.3                7.3 +/-    1.46      10.2 +/-    1.46  0.070 / 0.060
G26     89.4           55.5                8.1 +/-    0.96       9.6 +/-    0.96  0.040 / 0.070
G31     47.9           27.3                5.0 +/-    1.58       9.4 +/-    1.58  0.090 / 0.200