PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-21:43:00
G01     250.6          35.0                7.9 +/-    1.28      12.5 +/-    1.28  0.040 / 0.060
G03     315.8          44.3                7.3 +/-    1.49      10.0 +/-    1.49  0.040 / 0.050
G11     237.5          12.6                9.4 +/-    4.82      24.8 +/-    4.82  0.070 / 0.120
G14     60.9           40.5                7.5 +/-    0.72      10.8 +/-    0.72  0.060 / 0.110
G16     165.5          16.8               -4.6 +/-   20.26     -10.9 +/-   20.26  0.030 / 0.040
G22     304.5          65.9                7.6 +/-    0.57       8.2 +/-    0.57  0.030 / 0.050
G23     286.7          19.1                8.1 +/-    2.39      18.2 +/-    2.39  0.080 / 0.260
G26     137.9          37.8               10.5 +/-    0.74      15.9 +/-    0.74  0.070 / 0.270
G31     40.3           59.9                7.0 +/-    0.69       7.9 +/-    0.69  0.050 / 0.120
G32     77.4           23.3                7.3 +/-    1.57      14.8 +/-    1.57  0.060 / 0.120