PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-21:12:30
G07     313.9          49.7                8.4 +/-    0.82      10.6 +/-    0.82  0.120 / 0.240
G08     124.3          44.9               11.8 +/-    0.76      15.9 +/-    0.76  0.090 / 0.210
G09     273.3          82.1               11.5 +/-    0.94      11.6 +/-    0.94  0.120 / 0.210
G16     43.0           19.0                8.5 +/-    3.40      19.1 +/-    3.40  0.040 / 0.060
G23     148.3          54.8               11.0 +/-    0.44      13.1 +/-    0.44  0.200 / 0.490
G27     70.0           36.3                8.6 +/-    1.28      13.4 +/-    1.28  0.280 / 0.340
G28     227.8          18.6               14.6 +/-    2.00      33.2 +/-    2.00  0.040 / 0.050
G30     292.7          29.2                9.2 +/-    1.96      16.4 +/-    1.96  0.040 / 0.060