PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-19:27:50
G01     320.6          12.6                8.1 +/-    5.24      21.2 +/-    5.24  0.290 / 0.220
G08     263.2          16.1               12.2 +/-    2.56      29.5 +/-    2.56  0.160 / 0.370
G10     68.6           57.0                8.5 +/-    0.67       9.9 +/-    0.67  0.070 / 0.060
G11     308.8          19.5                9.3 +/-    1.14      20.8 +/-    1.14  0.070 / 0.080
G14     278.9          68.7               10.9 +/-    0.53      11.7 +/-    0.53  0.030 / 0.020
G18     97.0           31.8                8.4 +/-    1.36      14.1 +/-    1.36  0.030 / 0.020
G27     227.3          12.4               11.0 +/-    3.51      29.1 +/-    3.51  0.150 / 0.310
G31     178.9          33.6               11.5 +/-    0.83      18.8 +/-    0.83  0.110 / 0.250
G32     349.6          72.0                9.4 +/-    0.53       9.8 +/-    0.53  0.040 / 0.040