PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/07-14:58:00
G10     252.1          28.5                7.4 +/-    0.91      13.4 +/-    0.91  0.040 / 0.050
G13     51.8           28.5                5.9 +/-    0.41      10.6 +/-    0.41  0.040 / 0.040
G15     85.2           58.0                9.1 +/-    0.38      10.6 +/-    0.38  0.070 / 0.100
G16     295.3          15.0                4.4 +/-    2.97      10.8 +/-    2.97  0.060 / 0.130
G20     272.4          52.0                8.7 +/-    0.79      10.7 +/-    0.79  0.240 / 0.630
G21     341.0          63.3                6.1 +/-    0.50       6.7 +/-    0.50  0.150 / 0.660
G26     268.7          14.7                5.3 +/-    1.77      13.2 +/-    1.77  0.040 / 0.050
G29     163.9          46.7               10.6 +/-    0.53      13.9 +/-    0.53  0.040 / 0.060