PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/04-12:27:50
G01     225.7          17.3                4.1 +/-    3.61       9.6 +/-    3.61  0.040 / 0.040
G03     278.8          71.4                4.5 +/-    0.46       4.7 +/-    0.46  0.040 / 0.050
G14     86.3           23.8                4.3 +/-    1.21       8.7 +/-    1.21  0.040 / 0.040
G16     150.1          42.8                6.6 +/-    1.05       9.3 +/-    1.05  0.030 / 0.050
G22     206.5          69.1                5.5 +/-    0.67       5.9 +/-    0.67  0.110 / 0.300
G23     307.5          37.8                3.4 +/-    0.80       5.1 +/-    0.80  0.110 / 0.270
G26     101.7          54.6                5.1 +/-    0.72       6.1 +/-    0.72  0.110 / 0.170
G31     45.3           32.6                3.4 +/-    1.08       5.7 +/-    1.08  0.110 / 0.190