PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/09-14:28:00
G10     244.1          21.5                5.6 +/-    2.27      11.9 +/-    2.27  0.110 / 0.390
G13     61.4           33.3                6.1 +/-    1.22      10.0 +/-    1.22  0.110 / 0.400
G15     105.9          57.8                7.3 +/-    0.68       8.5 +/-    0.68  0.040 / 0.040
G16     304.9          14.5               -0.4 +/-    3.46      -1.0 +/-    3.46  0.030 / 0.040
G20     260.0          45.5                7.8 +/-    2.18      10.4 +/-    2.18  0.070 / 0.090
G21     328.4          56.8                5.2 +/-    0.38       6.1 +/-    0.38  0.090 / 0.110
G26     278.2          17.8                4.6 +/-    0.75      10.7 +/-    0.75  0.040 / 0.040
G29     160.4          57.7                9.0 +/-    0.66      10.4 +/-    0.66  0.050 / 0.040