PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-14:43:00
G05     52.1           10.3                4.1 +/-    3.27      11.3 +/-    3.27  0.410 / 0.340
G10     242.0          18.1                6.8 +/-    2.42      15.7 +/-    2.42  0.060 / 0.260
G13     66.2           35.7                6.2 +/-    1.77       9.6 +/-    1.77  0.030 / 0.030
G15     106.2          56.1                8.7 +/-    0.69      10.3 +/-    0.69  0.040 / 0.040
G16     310.1          12.6                3.8 +/-    1.57      10.0 +/-    1.57  0.090 / 0.150
G18     255.8          50.6                7.2 +/-    2.52       9.0 +/-    2.52  0.090 / 0.160
G20     31.5           61.1                6.0 +/-    0.74       6.8 +/-    0.74  0.160 / 0.360
G21     327.3          56.7                4.3 +/-    0.56       5.0 +/-    0.56  0.160 / 0.420
G26     281.0          18.6                3.1 +/-    1.62       7.2 +/-    1.62  0.050 / 0.080
G29     158.6          58.2                7.5 +/-    0.39       8.6 +/-    0.39  0.050 / 0.070