PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-22:43:00
G01     235.1          25.0                8.8 +/-    1.91      17.1 +/-    1.91  0.030 / 0.030
G03     306.7          59.0                7.5 +/-    0.86       8.6 +/-    0.86  0.030 / 0.020
G14     76.6           30.8                7.0 +/-    1.58      12.0 +/-    1.58  0.060 / 0.140
G16     158.5          31.8               10.2 +/-    1.72      17.3 +/-    1.72  0.060 / 0.130
G22     260.4          75.4               10.2 +/-    0.50      10.5 +/-    0.50  0.060 / 0.050
G23     298.5          29.0                8.2 +/-    1.63      14.7 +/-    1.63  0.040 / 0.040
G26     120.2          49.8                9.7 +/-    0.69      12.2 +/-    0.69  0.130 / 0.230
G31     41.0           44.4                7.7 +/-    1.14      10.5 +/-    1.14  0.100 / 0.210
G32     90.4           13.7                8.7 +/-    3.76      22.4 +/-    3.76  0.150 / 0.180