PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-03:58:10
G08     297.3          23.0                9.9 +/-    1.73      20.2 +/-    1.73  0.030 / 0.040
G10     352.7          62.4                5.4 +/-    1.26       6.0 +/-    1.26  0.030 / 0.040
G14     225.6          43.2                9.7 +/-    1.16      13.4 +/-    1.16  0.070 / 0.100
G18     53.4           55.5                5.7 +/-    0.98       6.7 +/-    0.98  0.060 / 0.140
G21     142.8          46.1               12.0 +/-    1.17      15.9 +/-    1.17  0.050 / 0.090
G24     62.9           28.7                4.9 +/-    0.99       8.7 +/-    0.99  0.050 / 0.080
G27     258.8          34.1                9.2 +/-    2.98      14.9 +/-    2.98  0.040 / 0.040
G32     236.4          62.3               10.4 +/-    0.80      11.6 +/-    0.80  0.030 / 0.030