PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-21:12:50
G03     208.1          54.9               12.0 +/-    1.85      14.3 +/-    1.85  0.050 / 0.070
G07     258.8          16.5                8.8 +/-    1.42      21.0 +/-    1.42  0.060 / 0.080
G09     311.2          29.0                6.3 +/-    1.78      11.4 +/-    1.78  0.030 / 0.050
G16     93.0           65.4               11.8 +/-    0.46      12.8 +/-    0.46  0.030 / 0.050
G22     187.2          39.2               11.4 +/-    2.36      16.8 +/-    2.36  0.040 / 0.050
G23     333.0          62.3                9.6 +/-    0.72      10.7 +/-    0.72  0.040 / 0.050
G26     51.9           41.8                8.2 +/-    0.61      11.5 +/-    0.61  0.080 / 0.280
G27     131.5          12.5               11.5 +/-    3.52      30.4 +/-    3.52  0.060 / 0.300