PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/14-14:28:00
G05     47.2           21.7                3.4 +/-    0.55       7.2 +/-    0.55  0.060 / 0.140
G13     84.4           37.0                6.1 +/-    1.02       9.4 +/-    1.02  0.070 / 0.120
G15     129.6          48.7                7.6 +/-    0.86       9.8 +/-    0.86  0.100 / 0.180
G18     241.1          39.7                6.5 +/-    1.75       9.5 +/-    1.75  0.100 / 0.220
G20     15.3           74.3                5.5 +/-    0.61       5.7 +/-    0.61  0.040 / 0.040
G25     202.1          14.9                8.0 +/-    2.41      19.8 +/-    2.41  0.040 / 0.040
G26     295.5          19.6                4.7 +/-    2.15      10.4 +/-    2.15  0.210 / 0.270
G29     147.1          73.9                6.7 +/-    1.04       7.0 +/-    1.04  0.280 / 0.330