PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-03:57:30
G08     297.8          22.9                8.1 +/-    1.09      16.6 +/-    1.09  0.070 / 0.040
G10     351.8          62.3                6.5 +/-    0.54       7.2 +/-    0.54  0.030 / 0.030
G14     225.3          42.8                8.8 +/-    1.92      12.3 +/-    1.92  0.110 / 0.070
G18     52.8           55.7                7.2 +/-    0.66       8.5 +/-    0.66  0.070 / 0.080
G21     142.5          46.6                9.5 +/-    0.95      12.5 +/-    0.95  0.030 / 0.020
G24     63.3           28.8                6.9 +/-    0.97      12.3 +/-    0.97  0.030 / 0.030
G27     259.3          34.3               11.3 +/-    0.38      18.2 +/-    0.38  0.050 / 0.060
G32     235.7          61.9                8.3 +/-    1.51       9.3 +/-    1.51  0.050 / 0.040