PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-14:57:20
G07     313.4          51.5               10.2 +/-    0.87      12.6 +/-    0.87  0.060 / 0.050
G08     127.7          40.6               12.7 +/-    1.54      18.3 +/-    1.54  0.050 / 0.050
G09     305.3          77.4                9.6 +/-    0.51       9.8 +/-    0.51  0.030 / 0.030
G16     42.1           26.3                6.5 +/-    2.07      12.4 +/-    2.07  0.030 / 0.020
G23     144.0          62.7               11.5 +/-    0.47      12.8 +/-    0.47  0.050 / 0.060
G27     81.1           37.6               11.2 +/-    1.04      16.9 +/-    1.04  0.070 / 0.080
G30     287.0          24.3                8.4 +/-    2.51      16.7 +/-    2.51  0.060 / 0.070