PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-21:58:00
G08     318.4          13.5                8.9 +/-    2.21      23.0 +/-    2.21  0.070 / 0.090
G10     309.5          55.5                8.1 +/-    0.85       9.6 +/-    0.85  0.050 / 0.090
G14     212.5          18.1               11.0 +/-    2.09      25.3 +/-    2.09  0.030 / 0.050
G15     45.9           26.2                9.9 +/-    1.21      18.7 +/-    1.21  0.040 / 0.050
G20     10.5           64.4               10.2 +/-    0.73      11.2 +/-    0.73  0.130 / 0.500
G21     116.0          68.6               12.2 +/-    0.70      13.0 +/-    0.70  0.120 / 0.620
G24     86.2           28.3               10.7 +/-    0.72      19.5 +/-    0.72  0.070 / 0.110
G27     292.8          36.2               10.2 +/-    1.25      15.8 +/-    1.25  0.060 / 0.120
G32     214.0          40.6               13.8 +/-    1.41      19.9 +/-    1.41  0.120 / 0.270