PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/14-00:12:30
G07     312.2          48.9                7.1 +/-    1.18       9.1 +/-    1.18  0.090 / 0.410
G08     123.7          43.9               12.8 +/-    0.72      17.5 +/-    0.72  0.090 / 0.400
G09     284.9          81.3                8.9 +/-    0.86       9.0 +/-    0.86  0.100 / 0.260
G16     42.4           22.4                5.3 +/-    1.14      10.9 +/-    1.14  0.080 / 0.270
G23     147.7          58.7               12.0 +/-    1.05      13.8 +/-    1.05  0.030 / 0.060
G27     72.1           36.5                6.8 +/-    0.45      10.6 +/-    0.45  0.030 / 0.040
G28     226.7          17.2               10.6 +/-    2.09      24.9 +/-    2.09  0.040 / 0.070
G30     290.7          27.3                8.5 +/-    3.40      15.8 +/-    3.40  0.040 / 0.060