PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/10-16:58:10
G10     288.5          48.2                7.7 +/-    1.75       9.9 +/-    1.75  0.050 / 0.080
G15     47.1           32.1                6.8 +/-    0.74      11.4 +/-    0.74  0.050 / 0.110
G18     349.2          66.8                6.7 +/-    0.59       7.2 +/-    0.59  0.030 / 0.040
G20     66.3           24.1                6.3 +/-    0.50      12.5 +/-    0.50  0.030 / 0.030
G21     89.0           72.6                9.0 +/-    0.74       9.4 +/-    0.74  0.090 / 0.170
G24     104.9          24.0                8.0 +/-    1.36      16.0 +/-    1.36  0.080 / 0.180
G27     305.1          32.3                7.0 +/-    2.15      11.7 +/-    2.15  0.080 / 0.190
G32     208.9          25.3               10.4 +/-    0.87      20.2 +/-    0.87  0.070 / 0.190