PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/15-21:27:50
G01     238.2          27.9                9.1 +/-    1.56      16.7 +/-    1.56  0.070 / 0.120
G03     310.8          55.4                4.9 +/-    2.12       5.8 +/-    2.12  0.100 / 0.100
G14     72.9           32.8                5.1 +/-    1.25       8.4 +/-    1.25  0.050 / 0.050
G16     157.5          29.3                6.7 +/-    1.38      11.8 +/-    1.38  0.040 / 0.050
G18     209.5          16.5                6.8 +/-    1.86      16.2 +/-    1.86  0.080 / 0.120
G22     274.9          74.4                5.6 +/-    0.69       5.8 +/-    0.69  0.090 / 0.150
G23     295.0          25.4                6.9 +/-    1.58      13.3 +/-    1.58  0.070 / 0.090
G26     126.1          47.1                7.9 +/-    0.94      10.3 +/-    0.94  0.070 / 0.100
G31     40.1           49.9                4.8 +/-    0.72       6.1 +/-    0.72  0.030 / 0.030
G32     87.1           16.0                6.5 +/-    2.61      15.8 +/-    2.61  0.030 / 0.030