PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/24-02:28:10
G07     345.0          61.8                4.0 +/-    0.51       4.5 +/-    0.51  0.100 / 0.110
G08     86.5           52.6                4.7 +/-    1.15       5.8 +/-    1.15  0.090 / 0.110
G09     185.8          66.6                5.5 +/-    0.58       5.9 +/-    0.58  0.040 / 0.050
G11     141.7          17.1                5.3 +/-    1.69      12.6 +/-    1.69  0.040 / 0.040
G23     157.7          34.8                6.3 +/-    1.08      10.0 +/-    1.08  0.030 / 0.020
G27     48.4           26.8                2.7 +/-    1.66       5.0 +/-    1.66  0.030 / 0.020
G28     243.8          35.8                5.5 +/-    2.23       8.6 +/-    2.23  0.080 / 0.130
G30     309.1          41.6                3.2 +/-    1.19       4.6 +/-    1.19  0.120 / 0.120