PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/27-21:12:50
G01     249.3          34.4               10.2 +/-    1.35      16.4 +/-    1.35  0.040 / 0.040
G03     315.5          45.8                8.0 +/-    0.67      10.7 +/-    0.67  0.040 / 0.040
G11     236.8          11.9                9.5 +/-    1.48      25.5 +/-    1.48  0.100 / 0.210
G14     62.0           39.9                7.3 +/-    2.23      10.6 +/-    2.23  0.110 / 0.220
G16     164.6          18.1               -3.8 +/-   15.49      -8.8 +/-   15.49  0.030 / 0.030
G22     302.7          67.2                7.6 +/-    0.66       8.2 +/-    0.66  0.040 / 0.040
G23     287.7          20.0                8.4 +/-    2.00      18.5 +/-    2.00  0.090 / 0.150
G26     136.4          38.9               11.2 +/-    0.66      16.7 +/-    0.66  0.110 / 0.120
G31     40.2           58.2                7.3 +/-    0.43       8.4 +/-    0.43  0.050 / 0.090
G32     78.6           22.3                6.4 +/-    0.99      13.3 +/-    0.99  0.050 / 0.080