PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/04-16:12:40
G10     253.7          28.5                9.3 +/-    2.20      16.9 +/-    2.20  0.050 / 0.060
G13     51.2           28.9                7.9 +/-    1.63      14.1 +/-    1.63  0.060 / 0.060
G15     77.3           55.5               10.0 +/-    1.09      11.8 +/-    1.09  0.120 / 0.490
G16     296.8          13.5                5.7 +/-    3.23      14.6 +/-    3.23  0.100 / 0.380
G18     277.0          59.7               10.0 +/-    1.54      11.4 +/-    1.54  0.100 / 0.140
G20     43.6           47.7                7.7 +/-    0.88      10.0 +/-    0.88  0.090 / 0.190
G21     347.6          66.0                8.9 +/-    0.80       9.6 +/-    0.80  0.050 / 0.030
G26     267.3          13.9                6.0 +/-    2.50      15.2 +/-    2.50  0.040 / 0.040
G29     163.5          41.1               11.5 +/-    0.63      16.5 +/-    0.63  0.100 / 0.540