PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-05:12:40
G10     260.2          33.8                6.9 +/-    1.26      11.1 +/-    1.26  0.150 / 0.280
G13     45.6           23.4                6.6 +/-    2.70      13.3 +/-    2.70  0.130 / 0.440
G15     67.5           53.2                8.1 +/-    0.39       9.8 +/-    0.39  0.050 / 0.040
G16     284.5          14.0                5.1 +/-    1.37      12.9 +/-    1.37  0.050 / 0.040
G20     327.3          69.2                5.5 +/-    0.38       5.8 +/-    0.38  0.110 / 0.260
G21     348.3          67.3                6.6 +/-    0.62       7.1 +/-    0.62  0.130 / 0.280
G24     125.4          10.4               -5.0 +/-   27.95     -13.9 +/-   27.95  0.120 / 0.280
G26     256.9          10.9                9.7 +/-    1.82      26.6 +/-    1.82  0.080 / 0.310
G27     321.0          14.0                2.8 +/-    1.39       7.0 +/-    1.39  0.240 / 0.330
G29     167.4          38.7               10.4 +/-    1.41      15.4 +/-    1.41  0.260 / 0.360