PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-18:28:00
G01     319.0          17.7               10.2 +/-    1.33      23.8 +/-    1.33  0.050 / 0.070
G08     258.2          13.2                9.6 +/-    2.30      25.0 +/-    2.30  0.040 / 0.050
G10     79.0           53.9               10.9 +/-    0.56      13.2 +/-    0.56  0.020 / 0.020
G11     304.2          22.3                9.2 +/-    1.44      19.2 +/-    1.44  0.020 / 0.020
G14     296.0          70.4               10.7 +/-    0.63      11.3 +/-    0.63  0.040 / 0.040
G18     102.5          27.4               10.0 +/-    0.70      18.5 +/-    0.70  0.040 / 0.040
G31     177.1          41.0               12.0 +/-    1.12      17.2 +/-    1.12  0.120 / 0.220
G32     6.0            67.8                9.5 +/-    0.39      10.2 +/-    0.39  0.240 / 0.300