PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/09-22:27:50
G01     248.6          34.0                9.0 +/-    1.38      14.5 +/-    1.38  0.040 / 0.040
G03     315.4          45.6                7.3 +/-    0.87       9.8 +/-    0.87  0.030 / 0.040
G11     235.8          11.6                9.7 +/-   11.47      26.2 +/-   11.47  0.120 / 0.210
G14     62.9           39.2                6.5 +/-    1.97       9.5 +/-    1.97  0.100 / 0.190
G16     165.1          18.1                4.7 +/-   18.65      10.8 +/-   18.65  0.030 / 0.030
G22     302.1          67.3                8.3 +/-    0.55       9.0 +/-    0.55  0.030 / 0.030
G23     288.0          20.0                8.1 +/-    1.73      17.7 +/-    1.73  0.090 / 0.100
G26     136.8          39.1               10.6 +/-    0.70      15.6 +/-    0.70  0.110 / 0.160
G31     39.9           58.5                6.9 +/-    0.63       7.9 +/-    0.63  0.110 / 0.100
G32     78.8           22.4                6.6 +/-    1.08      13.8 +/-    1.08  0.080 / 0.110