PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-20:58:00
G01     61.2           30.9               12.7 +/-    0.81      21.9 +/-    0.81  0.090 / 0.300
G07     141.9          23.6               14.1 +/-    1.80      28.4 +/-    1.80  0.080 / 0.290
G11     49.3           25.6               11.1 +/-    0.83      21.5 +/-    0.83  0.060 / 0.080
G13     264.0          35.5               12.7 +/-    1.35      19.9 +/-    1.35  0.070 / 0.090
G15     294.9          16.3                8.7 +/-    1.74      21.0 +/-    1.74  0.080 / 0.180
G17     249.2          71.9               13.2 +/-    0.63      13.8 +/-    0.63  0.060 / 0.170
G18     43.3           13.8                9.3 +/-    1.29      23.9 +/-    1.29  0.080 / 0.220
G19     231.6          48.7               13.6 +/-    0.99      17.4 +/-    0.99  0.080 / 0.180
G28     34.8           56.8               11.1 +/-    0.72      13.0 +/-    0.72  0.030 / 0.060
G30     142.7          51.9               14.8 +/-    1.14      18.3 +/-    1.14  0.040 / 0.070