PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-19:27:50
G01     318.6          18.7               10.5 +/-    2.49      23.9 +/-    2.49  0.110 / 0.240
G08     256.7          12.6               12.4 +/-   16.17      32.6 +/-   16.17  0.110 / 0.250
G10     80.9           53.2               10.2 +/-    0.94      12.4 +/-    0.94  0.060 / 0.070
G11     302.8          23.2               10.6 +/-    0.83      21.6 +/-    0.83  0.060 / 0.050
G14     300.8          70.8               10.0 +/-    0.58      10.5 +/-    0.58  0.060 / 0.040
G18     103.4          26.8                9.8 +/-    1.73      18.5 +/-    1.73  0.060 / 0.040
G22     300.9          10.8                1.3 +/-   11.02       3.5 +/-   11.02  0.040 / 0.020
G31     177.4          41.8               15.5 +/-    1.15      21.9 +/-    1.15  0.030 / 0.020
G32     7.5            67.2                9.2 +/-    0.33       9.9 +/-    0.33  0.040 / 0.030