PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-21:58:00
G01     247.3          33.3               11.5 +/-    1.07      18.9 +/-    1.07  0.030 / 0.040
G03     315.0          47.1                6.9 +/-    0.45       9.0 +/-    0.45  0.030 / 0.050
G11     235.1          10.9               11.7 +/-    3.88      32.0 +/-    3.88  0.070 / 0.100
G14     64.1           38.6                8.4 +/-    0.71      12.4 +/-    0.71  0.060 / 0.120
G16     164.2          19.5               13.0 +/-    1.38      29.0 +/-    1.38  0.030 / 0.050
G22     300.0          68.5                9.7 +/-    1.16      10.3 +/-    1.16  0.020 / 0.040
G23     289.0          20.9               10.6 +/-    1.58      22.8 +/-    1.58  0.120 / 0.370
G26     135.2          40.3               12.9 +/-    0.69      18.7 +/-    0.69  0.140 / 0.320
G31     39.8           56.8                8.8 +/-    0.41      10.3 +/-    0.41  0.060 / 0.100
G32     80.0           21.4                8.1 +/-    1.85      17.2 +/-    1.85  0.050 / 0.110