PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/21-21:43:10
G01     224.0          15.0                8.8 +/-    2.70      21.8 +/-    2.70  0.120 / 0.240
G03     279.3          69.2                7.2 +/-    0.78       7.7 +/-    0.78  0.200 / 0.440
G09     296.3          11.1              -11.2 +/-   23.89     -30.6 +/-   23.89  0.030 / 0.050
G14     89.4           21.7                7.6 +/-    1.90      16.0 +/-    1.90  0.040 / 0.040
G16     145.3          47.1               10.8 +/-    0.73      14.1 +/-    0.73  0.040 / 0.060
G22     211.1          68.0                8.5 +/-    0.32       9.1 +/-    0.32  0.040 / 0.070
G23     308.3          37.6                7.9 +/-    1.09      12.0 +/-    1.09  0.090 / 0.230
G26     96.3           55.5                8.5 +/-    0.79      10.1 +/-    0.79  0.100 / 0.210
G31     45.3           33.5                6.8 +/-    0.96      11.1 +/-    0.96  0.080 / 0.070