PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/27-23:57:30
G03     187.9          14.0                7.4 +/-    2.40      19.0 +/-    2.40  0.100 / 0.150
G07     300.7          44.4                6.7 +/-    3.10       9.2 +/-    3.10  0.120 / 0.190
G08     131.8          35.6               13.0 +/-    1.37      20.3 +/-    1.37  0.050 / 0.050
G09     317.1          73.4                8.0 +/-    0.41       8.3 +/-    0.41  0.060 / 0.070
G16     41.9           32.4                4.4 +/-    1.82       7.4 +/-    1.82  0.030 / 0.020
G23     135.3          74.1                7.9 +/-    0.30       8.2 +/-    0.30  0.030 / 0.030
G27     92.9           36.9               10.1 +/-    1.10      15.5 +/-    1.10  0.070 / 0.120
G30     279.5          16.5                5.6 +/-    3.20      13.4 +/-    3.20  0.050 / 0.100