PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-23:28:00
G07     318.8          52.0                8.7 +/-    1.35      10.7 +/-    1.35  0.040 / 0.060
G08     117.3          47.5               12.6 +/-    0.55      16.3 +/-    0.55  0.030 / 0.060
G09     241.2          82.4                8.4 +/-    1.11       8.5 +/-    1.11  0.040 / 0.070
G16     43.7           17.0                5.5 +/-    0.93      13.0 +/-    0.93  0.060 / 0.060
G23     150.9          52.1               11.7 +/-    0.90      14.4 +/-    0.90  0.110 / 0.300
G27     65.3           35.3                8.2 +/-    0.76      12.9 +/-    0.76  0.150 / 0.340
G28     230.2          21.9                8.6 +/-    1.49      18.2 +/-    1.49  0.030 / 0.070
G30     295.6          31.4                8.8 +/-    0.93      14.9 +/-    0.93  0.040 / 0.060