PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/12-12:57:50
G07     316.1          52.4                5.7 +/-    0.84       7.0 +/-    0.84  0.040 / 0.050
G08     125.8          42.6                6.7 +/-    0.41       9.3 +/-    0.41  0.040 / 0.050
G09     294.0          80.2                4.6 +/-    0.26       4.7 +/-    0.26  0.050 / 0.060
G16     42.5           22.2                4.7 +/-    2.13       9.8 +/-    2.13  0.080 / 0.070
G23     146.0          57.7                7.6 +/-    0.49       8.8 +/-    0.49  0.030 / 0.050
G27     76.5           37.4                6.6 +/-    1.22      10.0 +/-    1.22  0.040 / 0.050
G30     289.8          26.9                6.5 +/-    2.24      12.1 +/-    2.24  0.030 / 0.030