PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-20:58:10
G01     279.0          41.3               11.2 +/-    2.13      16.0 +/-    2.13  0.040 / 0.060
G03     314.6          24.4                7.8 +/-    1.94      15.5 +/-    1.94  0.040 / 0.060
G10     126.1          22.3               11.8 +/-    0.96      24.6 +/-    0.96  0.030 / 0.020
G11     256.8          23.2               10.2 +/-    3.92      20.7 +/-    3.92  0.020 / 0.020
G14     36.3           53.5                8.3 +/-    2.35      10.1 +/-    2.35  0.070 / 0.180
G22     314.5          45.7                8.0 +/-    1.03      10.6 +/-    1.03  0.070 / 0.120
G25     57.8           18.1                8.2 +/-    2.23      19.0 +/-    2.23  0.050 / 0.070
G26     153.1          19.4               13.6 +/-    2.34      30.4 +/-    2.34  0.050 / 0.060
G31     82.0           80.1                7.8 +/-    0.75       7.9 +/-    0.75  0.040 / 0.050
G32     58.5           36.9                7.5 +/-    1.19      11.5 +/-    1.19  0.040 / 0.030