PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/24-11:58:00
G07     309.4          49.4                4.1 +/-    1.41       5.2 +/-    1.41  0.040 / 0.050
G08     131.7          38.7                5.6 +/-    0.83       8.4 +/-    0.83  0.040 / 0.050
G09     309.4          75.9                3.4 +/-    0.93       3.5 +/-    0.93  0.040 / 0.080
G16     42.1           26.2                2.8 +/-    1.03       5.3 +/-    1.03  0.050 / 0.080
G23     141.8          62.3                4.9 +/-    0.60       5.5 +/-    0.60  0.040 / 0.050
G27     83.0           37.3                2.2 +/-    0.63       3.4 +/-    0.63  0.030 / 0.050
G30     285.6          23.3                4.7 +/-    1.10       9.5 +/-    1.10  0.020 / 0.030