PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-15:57:40
G10     263.0          35.1               10.3 +/-    1.00      16.3 +/-    1.00  0.150 / 0.220
G13     44.3           22.2                6.6 +/-    2.21      13.7 +/-    2.21  0.210 / 0.150
G15     62.3           50.1                9.9 +/-    0.72      12.4 +/-    0.72  0.250 / 0.300
G16     286.9          12.2                9.0 +/-    1.15      24.0 +/-    1.15  0.160 / 0.270
G18     296.5          64.3                9.7 +/-    0.82      10.6 +/-    0.82  0.060 / 0.070
G20     50.5           40.1                7.2 +/-    1.28      10.4 +/-    1.28  0.050 / 0.080
G24     124.4          11.7               10.6 +/-    5.54      28.6 +/-    5.54  0.180 / 0.410
G27     319.5          17.1                8.0 +/-    1.98      18.8 +/-    1.98  0.230 / 0.400
G29     165.6          31.0                9.3 +/-    0.96      16.0 +/-    0.96  0.160 / 0.210