PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-14:57:40
G05     50.4           13.8                5.1 +/-    3.46      13.0 +/-    3.46  0.100 / 0.180
G10     239.0          14.9                6.8 +/-    1.64      17.0 +/-    1.64  0.190 / 0.210
G13     71.6           36.7                8.2 +/-    0.65      12.6 +/-    0.65  0.040 / 0.040
G15     114.4          54.6                9.0 +/-    0.39      10.8 +/-    0.39  0.030 / 0.040
G16     314.2          11.3                0.6 +/-    8.62       1.5 +/-    8.62  0.090 / 0.200
G18     250.7          47.3                7.6 +/-    3.50       9.9 +/-    3.50  0.090 / 0.160
G20     27.9           64.9                6.6 +/-    0.41       7.2 +/-    0.41  0.050 / 0.070
G21     322.5          54.1                5.6 +/-    0.60       6.8 +/-    0.60  0.060 / 0.060
G26     285.6          19.3                6.8 +/-    0.73      15.3 +/-    0.73  0.050 / 0.040
G29     156.0          62.7                9.7 +/-    0.57      10.7 +/-    0.57  0.030 / 0.050