PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-18:12:50
G08     294.0          22.7                9.7 +/-    0.98      20.1 +/-    0.98  0.070 / 0.120
G10     4.8            63.0                8.5 +/-    0.56       9.4 +/-    0.56  0.070 / 0.100
G14     229.7          46.1               14.7 +/-    1.41      19.5 +/-    1.41  0.070 / 0.090
G18     64.7           50.1               10.2 +/-    0.67      12.8 +/-    0.67  0.070 / 0.130
G21     145.0          35.1               12.9 +/-    1.14      20.5 +/-    1.14  0.050 / 0.030
G24     57.5           26.6                9.4 +/-    1.29      17.6 +/-    1.29  0.030 / 0.040
G27     253.4          31.7               11.8 +/-    1.97      20.0 +/-    1.97  0.070 / 0.080
G32     244.7          66.4               11.0 +/-    0.60      11.9 +/-    0.60  0.060 / 0.080