PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/25-21:12:40
G07     309.5          47.6                9.8 +/-    0.63      12.7 +/-    0.63  0.440 / 0.700
G08     128.4          42.2               13.4 +/-    0.82      18.8 +/-    0.82  0.500 / 0.620
G09     295.3          79.8                8.7 +/-    0.20       8.9 +/-    0.20  0.040 / 0.050
G16     42.3           22.3                8.4 +/-    2.41      17.5 +/-    2.41  0.040 / 0.050
G23     145.8          58.9               11.5 +/-    0.23      13.2 +/-    0.23  0.120 / 0.210
G27     74.7           36.8               12.0 +/-    0.61      18.4 +/-    0.61  0.100 / 0.390
G28     225.6          15.5               10.2 +/-    9.77      25.1 +/-    9.77  0.050 / 0.060
G30     289.7          27.0                8.3 +/-    1.99      15.6 +/-    1.99  0.050 / 0.050