PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/13-12:58:10
G10     242.7          18.9                2.5 +/-    2.00       5.7 +/-    2.00  0.080 / 0.140
G13     64.8           35.2                6.3 +/-    1.32       9.9 +/-    1.32  0.090 / 0.140
G15     103.8          56.4                8.1 +/-    0.39       9.5 +/-    0.39  0.040 / 0.040
G16     308.0          13.4                1.2 +/-    1.09       3.1 +/-    1.09  0.050 / 0.050
G18     257.4          51.8                6.0 +/-    3.09       7.4 +/-    3.09  0.040 / 0.050
G20     31.1           61.2                4.7 +/-    0.49       5.3 +/-    0.49  0.030 / 0.040
G21     326.8          56.4                3.3 +/-    0.61       3.8 +/-    0.61  0.090 / 0.280
G26     278.8          18.6                2.3 +/-    1.26       5.3 +/-    1.26  0.100 / 0.290
G29     159.7          58.1                9.3 +/-    0.37      10.8 +/-    0.37  0.060 / 0.090