PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/08-13:12:30
G07     315.5          52.1                5.9 +/-    1.03       7.2 +/-    1.03  0.070 / 0.060
G08     126.3          42.2                7.8 +/-    1.19      11.0 +/-    1.19  0.040 / 0.050
G09     296.8          79.6                4.3 +/-    0.42       4.3 +/-    0.42  0.060 / 0.050
G16     42.5           22.9                5.5 +/-    2.30      11.2 +/-    2.30  0.050 / 0.070
G23     145.6          58.6                8.7 +/-    0.41      10.0 +/-    0.41  0.040 / 0.050
G27     77.4           37.5                7.5 +/-    0.70      11.3 +/-    0.70  0.030 / 0.040
G30     289.6          26.9                6.6 +/-    2.16      12.3 +/-    2.16  0.030 / 0.030