PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/29-23:27:30
G03     203.9          48.3               12.0 +/-    1.52      15.5 +/-    1.52  0.040 / 0.040
G07     264.9          21.3                9.6 +/-    2.74      20.4 +/-    2.74  0.040 / 0.040
G09     314.5          35.5                8.4 +/-    1.41      13.2 +/-    1.41  0.090 / 0.120
G16     76.2           64.7               10.1 +/-    0.41      11.0 +/-    0.41  0.120 / 0.110
G22     185.6          32.4                9.0 +/-    1.12      15.0 +/-    1.12  0.030 / 0.040
G23     339.8          68.1                8.8 +/-    0.67       9.5 +/-    0.67  0.030 / 0.060
G26     47.7           36.8                7.5 +/-    1.13      11.6 +/-    1.13  0.070 / 0.120
G27     125.6          17.5               10.2 +/-    3.51      23.7 +/-    3.51  0.100 / 0.140