PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/23-18:42:50
G01     320.9          11.1               -7.7 +/-   37.20     -20.9 +/-   37.20  0.170 / 0.510
G08     265.2          16.9               10.8 +/-    1.73      25.6 +/-    1.73  0.180 / 0.430
G10     65.3           57.8               10.2 +/-    0.88      11.8 +/-    0.88  0.070 / 0.080
G11     310.3          18.1                9.3 +/-    1.91      21.5 +/-    1.91  0.070 / 0.070
G14     273.6          67.6               10.3 +/-    0.58      11.1 +/-    0.58  0.030 / 0.020
G18     95.4           32.9                9.9 +/-    1.29      16.3 +/-    1.29  0.020 / 0.020
G27     228.7          13.7               10.7 +/-    3.48      27.5 +/-    3.48  0.040 / 0.030
G31     178.9          32.0               12.8 +/-    1.52      21.5 +/-    1.52  0.030 / 0.030
G32     345.1          72.9               10.3 +/-    0.36      10.8 +/-    0.36  0.030 / 0.020