PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-16:27:40
G07     313.3          51.4                9.3 +/-    0.77      11.5 +/-    0.77  0.050 / 0.050
G08     126.8          40.8               11.5 +/-    0.52      16.6 +/-    0.52  0.050 / 0.050
G09     305.2          77.5                8.6 +/-    0.39       8.8 +/-    0.39  0.170 / 0.140
G16     42.1           27.4                5.9 +/-    2.00      10.9 +/-    2.00  0.120 / 0.140
G23     144.2          63.6               11.5 +/-    0.57      12.7 +/-    0.57  0.060 / 0.060
G27     81.4           37.7               10.1 +/-    1.04      15.3 +/-    1.04  0.060 / 0.070
G30     286.6          23.6               10.1 +/-    1.16      20.4 +/-    1.16  0.030 / 0.030