PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-08:57:40
G08     282.8          21.0                4.4 +/-    1.11       9.5 +/-    1.11  0.050 / 0.080
G10     36.4           62.1                4.7 +/-    0.38       5.2 +/-    0.38  0.050 / 0.100
G14     242.9          53.3                5.4 +/-    0.95       6.5 +/-    0.95  0.080 / 0.250
G18     316.8          20.4                3.5 +/-    1.96       7.7 +/-    1.96  0.080 / 0.210
G20     95.3           21.1                3.9 +/-    1.43       8.3 +/-    1.43  0.080 / 0.180
G21     151.9          27.3                6.7 +/-    2.21      12.5 +/-    2.21  0.130 / 0.200
G24     45.7           18.3                2.3 +/-    0.72       5.3 +/-    0.72  0.020 / 0.030
G27     241.1          23.7                4.5 +/-    1.36       9.0 +/-    1.36  0.030 / 0.030
G31     179.4          20.0                4.5 +/-    1.98       9.8 +/-    1.98  0.060 / 0.120
G32     294.2          76.6                5.1 +/-    0.36       5.2 +/-    0.36  0.060 / 0.130