PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/02-08:57:50
G08     292.7          21.6                5.2 +/-    1.31      10.9 +/-    1.31  0.100 / 0.090
G10     15.7           63.1                4.3 +/-    0.72       4.8 +/-    0.72  0.090 / 0.090
G14     233.0          45.6                7.0 +/-    0.88       9.3 +/-    0.88  0.110 / 0.100
G18     317.7          12.3                1.7 +/-    5.33       4.4 +/-    5.33  0.100 / 0.130
G20     88.8           24.5                5.9 +/-    1.19      11.7 +/-    1.19  0.080 / 0.170
G21     148.4          36.5                6.2 +/-    1.03       9.6 +/-    1.03  0.080 / 0.170
G24     52.6           23.7                4.0 +/-    0.81       8.0 +/-    0.81  0.040 / 0.040
G27     249.7          29.4                6.1 +/-    2.79      10.8 +/-    2.79  0.040 / 0.030
G31     181.8          11.3               -1.2 +/-   12.46      -3.2 +/-   12.46  0.100 / 0.130
G32     258.0          72.4                7.3 +/-    0.61       7.6 +/-    0.61  0.090 / 0.130