PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-13:42:30
G03     235.1          70.7                8.4 +/-    0.46       8.9 +/-    0.46  0.030 / 0.030
G09     300.3          13.9                5.6 +/-    4.36      14.3 +/-    4.36  0.040 / 0.040
G14     96.2           16.5                8.4 +/-    1.48      20.1 +/-    1.48  0.040 / 0.040
G16     139.6          53.8               10.9 +/-    0.66      13.2 +/-    0.66  0.050 / 0.050
G22     192.2          56.8                8.8 +/-    0.52      10.3 +/-    0.52  0.160 / 0.290
G23     316.0          45.9                7.7 +/-    0.85      10.2 +/-    0.85  0.130 / 0.260
G26     80.1           54.9                8.7 +/-    0.44      10.4 +/-    0.44  0.040 / 0.040
G31     50.1           23.4                6.6 +/-    2.13      13.4 +/-    2.13  0.050 / 0.050