PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-14:12:40
G10     250.0          25.6                6.3 +/-    1.69      12.1 +/-    1.69  0.110 / 0.340
G13     54.9           31.2                4.4 +/-    1.57       7.6 +/-    1.57  0.170 / 0.360
G15     85.0           56.6                7.0 +/-    0.81       8.2 +/-    0.81  0.040 / 0.060
G16     299.6          14.1                3.6 +/-    1.72       9.3 +/-    1.72  0.060 / 0.060
G18     270.6          57.7                6.1 +/-    1.66       7.1 +/-    1.66  0.090 / 0.260
G20     39.5           52.4                5.8 +/-    0.93       7.1 +/-    0.93  0.080 / 0.270
G21     340.0          63.0                3.8 +/-    0.90       4.2 +/-    0.90  0.070 / 0.110
G26     270.2          15.7                5.0 +/-    1.10      12.3 +/-    1.10  0.070 / 0.150
G29     162.9          47.0                7.7 +/-    0.50      10.1 +/-    0.50  0.030 / 0.050