PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/31-21:12:40
G02     231.5          72.0                9.4 +/-    1.32       9.8 +/-    1.32  0.060 / 0.090
G05     172.8          12.6               13.5 +/-    1.87      35.6 +/-    1.87  0.060 / 0.090
G06     42.2           64.4                8.8 +/-    0.62       9.7 +/-    0.62  0.080 / 0.080
G12     320.4          44.8                7.6 +/-    1.34      10.3 +/-    1.34  0.050 / 0.080
G17     66.4           25.6                9.3 +/-    1.28      18.0 +/-    1.28  0.040 / 0.050
G19     52.6           40.8                9.5 +/-    1.00      13.6 +/-    1.00  0.030 / 0.040
G24     249.9          37.1               12.1 +/-    0.73      18.4 +/-    0.73  0.050 / 0.070