PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-14:58:00
G07     313.4          51.5                9.0 +/-    0.89      11.1 +/-    0.89  0.040 / 0.060
G08     127.7          40.6               12.6 +/-    0.97      18.2 +/-    0.97  0.040 / 0.060
G09     305.3          77.4                9.7 +/-    0.85       9.9 +/-    0.85  0.030 / 0.030
G16     42.1           26.3                7.5 +/-    2.69      14.3 +/-    2.69  0.030 / 0.030
G23     144.0          62.7               14.0 +/-    1.00      15.5 +/-    1.00  0.050 / 0.090
G27     81.1           37.6                8.7 +/-    0.83      13.2 +/-    0.83  0.060 / 0.080
G30     287.0          24.3                9.0 +/-    1.32      17.8 +/-    1.32  0.040 / 0.050