PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/09-18:42:30
G08     291.2          22.9                8.3 +/-    0.96      17.0 +/-    0.96  0.140 / 0.120
G10     10.3           63.2                8.3 +/-    0.67       9.1 +/-    0.67  0.080 / 0.080
G14     232.0          48.5                9.0 +/-    1.71      11.5 +/-    1.71  0.180 / 0.180
G18     67.6           48.8                7.2 +/-    0.70       9.2 +/-    0.70  0.220 / 0.220
G21     146.2          33.0                9.4 +/-    1.11      15.5 +/-    1.11  0.030 / 0.020
G24     55.2           25.6                8.0 +/-    2.88      15.4 +/-    2.88  0.040 / 0.020
G27     250.8          30.3                9.0 +/-    2.02      15.7 +/-    2.02  0.050 / 0.120
G32     249.6          68.2                7.7 +/-    0.35       8.3 +/-    0.35  0.060 / 0.090