PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/11-19:12:50
G01     63.2           31.2                8.2 +/-    1.02      14.0 +/-    1.02  0.040 / 0.050
G07     140.0          19.5               10.2 +/-    3.83      22.8 +/-    3.83  0.040 / 0.050
G11     49.2           25.8                8.3 +/-    2.35      16.0 +/-    2.35  0.160 / 0.250
G13     265.6          37.1               12.0 +/-    2.09      18.3 +/-    2.09  0.110 / 0.210
G15     296.1          16.5                7.8 +/-    2.10      18.7 +/-    2.10  0.160 / 0.190
G17     246.3          74.3               11.5 +/-    0.72      11.9 +/-    0.72  0.110 / 0.190
G18     43.1           13.7                6.9 +/-    2.02      17.8 +/-    2.02  0.070 / 0.110
G19     228.6          48.2               11.6 +/-    2.25      14.9 +/-    2.25  0.080 / 0.110
G28     21.4           59.7                9.2 +/-    1.06      10.5 +/-    1.06  0.160 / 0.360
G30     141.0          53.2                8.8 +/-    0.77      10.7 +/-    0.77  0.230 / 0.350