PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/28-00:27:30
G07     316.8          52.0                6.3 +/-    0.77       7.8 +/-    0.77  0.040 / 0.050
G08     116.7          45.3               11.4 +/-    0.66      15.4 +/-    0.66  0.030 / 0.040
G09     252.7          84.0                7.8 +/-    0.68       7.8 +/-    0.68  0.070 / 0.070
G16     42.9           20.1                4.5 +/-    2.36       9.8 +/-    2.36  0.060 / 0.060
G23     149.8          59.5                8.4 +/-    0.62       9.6 +/-    0.62  0.540 / 0.440
G27     74.6           38.1                8.1 +/-    0.83      12.2 +/-    0.83  0.590 / 0.600
G28     227.0          15.5                4.3 +/-   14.52      10.6 +/-   14.52  0.030 / 0.040
G30     290.0          24.8                6.3 +/-    2.52      12.3 +/-    2.52  0.040 / 0.040