PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-19:57:40
G01     314.0          26.5                8.9 +/-    1.29      16.9 +/-    1.29  0.120 / 0.110
G10     94.8           47.2                8.6 +/-    0.66      11.3 +/-    0.66  0.090 / 0.140
G11     293.1          26.8                8.2 +/-    1.69      15.4 +/-    1.69  0.130 / 0.260
G14     332.3          70.3                8.2 +/-    0.59       8.7 +/-    0.59  0.120 / 0.240
G18     111.1          19.8                9.3 +/-    1.36      20.5 +/-    1.36  0.040 / 0.040
G22     305.6          17.9                8.6 +/-    1.93      20.0 +/-    1.93  0.030 / 0.030
G25     91.2           13.3               10.5 +/-    2.23      27.2 +/-    2.23  0.030 / 0.030
G31     174.9          52.8               12.6 +/-    0.85      15.4 +/-    0.85  0.020 / 0.020
G32     23.4           60.1                8.0 +/-    0.72       9.1 +/-    0.72  0.040 / 0.040