PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/28-21:12:50
G01     247.3          33.3               10.9 +/-    1.46      17.8 +/-    1.46  0.040 / 0.030
G03     315.0          47.6                9.3 +/-    1.16      12.1 +/-    1.16  0.030 / 0.030
G11     235.4          10.9               10.9 +/-    3.08      29.8 +/-    3.08  0.030 / 0.040
G14     63.9           38.8                9.6 +/-    1.35      14.2 +/-    1.35  0.040 / 0.040
G16     163.8          19.9               10.3 +/-    4.34      22.8 +/-    4.34  0.140 / 0.250
G22     299.7          68.8                9.6 +/-    0.42      10.2 +/-    0.42  0.180 / 0.320
G23     289.1          21.2                9.3 +/-    2.58      20.0 +/-    2.58  0.040 / 0.070
G26     134.6          40.4               11.4 +/-    0.67      16.4 +/-    0.67  0.050 / 0.090
G31     40.0           56.3                7.9 +/-    0.44       9.3 +/-    0.44  0.080 / 0.140
G32     80.1           21.2                8.7 +/-    2.65      18.6 +/-    2.65  0.070 / 0.120