PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/18-08:42:40
G10     244.7          21.1                5.3 +/-    4.78      11.4 +/-    4.78  0.110 / 0.400
G13     61.3           33.9                4.5 +/-    1.29       7.2 +/-    1.29  0.090 / 0.290
G15     99.0           57.0                7.8 +/-    0.75       9.1 +/-    0.75  0.040 / 0.040
G16     303.3          14.9                1.6 +/-    2.01       4.0 +/-    2.01  0.040 / 0.040
G20     22.1           65.9                4.3 +/-    0.63       4.7 +/-    0.63  0.030 / 0.040
G21     326.6          56.1                4.2 +/-    0.51       5.0 +/-    0.51  0.030 / 0.040
G26     274.3          18.2                6.1 +/-    2.10      14.0 +/-    2.10  0.090 / 0.120
G29     162.1          57.4                7.8 +/-    0.50       9.1 +/-    0.50  0.070 / 0.100