PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-21:28:00
G07     322.4          53.6                9.2 +/-    0.41      11.1 +/-    0.41  0.140 / 0.230
G08     115.1          49.2               11.4 +/-    0.63      14.6 +/-    0.63  0.300 / 0.350
G09     219.8          80.9               10.8 +/-    0.51      10.9 +/-    0.51  0.060 / 0.070
G16     44.7           13.3                7.6 +/-    2.59      19.6 +/-    2.59  0.050 / 0.070
G23     152.0          47.5               11.5 +/-    0.39      15.0 +/-    0.39  0.090 / 0.290
G27     61.8           34.4                8.2 +/-    0.91      13.2 +/-    0.91  0.090 / 0.210
G28     232.2          24.3               13.5 +/-    2.53      26.8 +/-    2.53  0.040 / 0.040
G30     298.3          33.6                8.1 +/-    1.68      13.3 +/-    1.68  0.030 / 0.040