PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/23-00:12:40
G03     199.7          41.0                6.5 +/-    0.92       9.3 +/-    0.92  0.120 / 0.120
G07     271.2          25.8                5.3 +/-    1.05      10.2 +/-    1.05  0.100 / 0.130
G08     154.4          11.7                6.8 +/-   12.27      18.3 +/-   12.27  0.340 / 0.420
G09     317.4          42.2                4.2 +/-    0.58       6.0 +/-    0.58  0.240 / 0.310
G16     61.2           60.7                5.1 +/-    0.66       5.7 +/-    0.66  0.030 / 0.030
G22     183.6          25.3                6.6 +/-    1.00      12.8 +/-    1.00  0.030 / 0.030
G23     351.0          74.6                3.5 +/-    0.43       3.6 +/-    0.43  0.070 / 0.110
G26     44.9           30.8                3.5 +/-    1.66       6.1 +/-    1.66  0.070 / 0.130
G27     119.4          22.5                6.8 +/-    1.32      14.2 +/-    1.32  0.050 / 0.050