PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/20-17:57:50
G01     321.0          11.6              -16.8 +/-   22.88     -45.3 +/-   22.88  0.230 / 0.270
G08     262.3          17.0               10.1 +/-    1.26      23.9 +/-    1.26  0.070 / 0.050
G10     67.5           56.5               11.0 +/-    0.72      12.9 +/-    0.72  0.070 / 0.040
G11     308.5          20.0                7.8 +/-    2.15      17.1 +/-    2.15  0.030 / 0.030
G14     275.3          68.6               11.5 +/-    0.68      12.2 +/-    0.68  0.040 / 0.030
G18     309.1          37.4                9.4 +/-    1.52      14.3 +/-    1.52  0.090 / 0.310
G20     98.5           34.4               10.6 +/-    0.94      17.0 +/-    0.94  0.100 / 0.310
G27     231.9          14.6                9.9 +/-    4.64      25.0 +/-    4.64  0.170 / 0.210
G31     180.6          30.2               11.9 +/-    1.51      20.8 +/-    1.51  0.170 / 0.230
G32     344.9          73.0               11.0 +/-    0.77      11.5 +/-    0.77  0.060 / 0.080