PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-14:42:40
G05     52.1           10.3                4.5 +/-    3.22      12.4 +/-    3.22  0.090 / 0.230
G10     242.0          18.1                4.4 +/-    2.20      10.1 +/-    2.20  0.080 / 0.320
G13     66.2           35.7                4.6 +/-    0.64       7.2 +/-    0.64  0.050 / 0.050
G15     106.2          56.1                7.7 +/-    0.30       9.1 +/-    0.30  0.030 / 0.060
G16     310.1          12.6                2.7 +/-    1.85       7.2 +/-    1.85  0.120 / 0.180
G18     255.8          50.6                5.6 +/-    0.78       7.1 +/-    0.78  0.090 / 0.240
G20     31.5           61.1                5.6 +/-    0.41       6.3 +/-    0.41  0.030 / 0.040
G21     327.3          56.7                3.9 +/-    0.52       4.5 +/-    0.52  0.030 / 0.050
G26     281.0          18.6                3.4 +/-    1.28       7.7 +/-    1.28  0.130 / 0.370
G29     158.6          58.2                6.8 +/-    0.82       7.9 +/-    0.82  0.130 / 0.320