PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/15-15:57:50
G08     298.7          21.8                5.3 +/-    1.68      11.2 +/-    1.68  0.070 / 0.080
G10     356.9          62.7                4.9 +/-    0.62       5.5 +/-    0.62  0.060 / 0.080
G14     226.6          42.0                8.2 +/-    2.13      11.5 +/-    2.13  0.050 / 0.070
G18     60.5           51.6                6.0 +/-    0.63       7.5 +/-    0.63  0.060 / 0.060
G21     143.4          40.7                9.0 +/-    0.75      13.0 +/-    0.75  0.070 / 0.080
G24     61.0           27.9                4.9 +/-    2.27       8.9 +/-    2.27  0.050 / 0.100
G27     257.7          33.5                7.1 +/-    1.82      11.5 +/-    1.82  0.030 / 0.030
G32     238.7          64.1                8.0 +/-    0.64       8.7 +/-    0.64  0.040 / 0.030