PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/21-18:57:40
G01     320.3          13.6                7.0 +/-    1.81      18.1 +/-    1.81  0.150 / 0.410
G08     262.3          15.5                8.2 +/-    1.99      20.1 +/-    1.99  0.180 / 0.280
G10     70.8           56.4                7.0 +/-    0.32       8.2 +/-    0.32  0.060 / 0.080
G11     308.0          20.0                6.7 +/-    1.51      14.8 +/-    1.51  0.050 / 0.100
G14     281.9          69.0                7.7 +/-    0.51       8.2 +/-    0.51  0.020 / 0.030
G18     98.2           30.9                6.8 +/-    2.54      11.7 +/-    2.54  0.030 / 0.020
G27     226.5          11.6                8.7 +/-    2.57      23.4 +/-    2.57  0.030 / 0.040
G31     178.4          35.2                8.7 +/-    0.61      13.7 +/-    0.61  0.030 / 0.040
G32     353.8          71.2                6.6 +/-    0.64       6.9 +/-    0.64  0.030 / 0.020