PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/23-19:57:40
G01     302.1          36.1               10.8 +/-    2.39      16.7 +/-    2.39  0.090 / 0.120
G10     111.2          36.7               12.2 +/-    0.86      18.8 +/-    0.86  0.080 / 0.140
G11     276.9          27.9                9.3 +/-    1.07      16.9 +/-    1.07  0.130 / 0.150
G14     7.8            64.2                8.8 +/-    0.42       9.6 +/-    0.42  0.090 / 0.130
G22     311.3          29.7                9.3 +/-    1.32      16.3 +/-    1.32  0.030 / 0.030
G25     76.7           17.9               10.9 +/-    2.36      25.4 +/-    2.36  0.030 / 0.030
G31     164.0          69.8               12.0 +/-    0.26      12.7 +/-    0.26  0.030 / 0.040
G32     41.0           49.2                8.8 +/-    1.73      11.1 +/-    1.73  0.040 / 0.030