PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-15:12:40
G07     310.5          50.3                9.7 +/-    1.24      12.2 +/-    1.24  0.040 / 0.060
G08     130.0          38.8               11.7 +/-    0.30      17.3 +/-    0.30  0.040 / 0.070
G09     310.7          75.0                8.4 +/-    0.46       8.6 +/-    0.46  0.060 / 0.060
G16     42.0           28.8                6.4 +/-    1.94      11.6 +/-    1.94  0.050 / 0.060
G23     141.7          65.5               11.5 +/-    0.70      12.5 +/-    0.70  0.030 / 0.050
G27     84.5           37.4                9.0 +/-    0.67      13.7 +/-    0.67  0.030 / 0.040
G30     285.0          22.6               10.3 +/-    1.65      21.3 +/-    1.65  0.050 / 0.130