PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/22-15:28:10
G10     266.6          37.4                6.7 +/-    1.53      10.2 +/-    1.53  0.090 / 0.190
G13     42.5           19.5                4.4 +/-    2.75       9.9 +/-    2.75  0.170 / 0.180
G15     58.3           47.5                6.4 +/-    0.52       8.3 +/-    0.52  0.050 / 0.080
G16     283.1          11.3                5.7 +/-    1.73      15.5 +/-    1.73  0.050 / 0.070
G18     304.7          65.5                6.7 +/-    0.61       7.3 +/-    0.61  0.170 / 0.220
G20     52.8           37.7                4.9 +/-    0.72       7.3 +/-    0.72  0.140 / 0.220
G21     19.4           73.4                6.0 +/-    0.83       6.2 +/-    0.83  0.300 / 0.260
G24     121.5          13.8               10.5 +/-    2.29      27.0 +/-    2.29  0.260 / 0.250
G27     318.1          19.8                4.5 +/-    1.64       9.9 +/-    1.64  0.210 / 0.370
G29     166.3          27.7                8.9 +/-    1.33      16.3 +/-    1.33  0.170 / 0.360