PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-06:12:40
G10     267.1          38.1                5.9 +/-    1.42       8.9 +/-    1.42  0.210 / 0.310
G13     42.0           18.5                3.0 +/-    2.62       6.8 +/-    2.62  0.240 / 0.430
G15     58.8           48.4                4.9 +/-    0.75       6.2 +/-    0.75  0.030 / 0.040
G16     278.3          12.0                5.5 +/-    1.92      14.8 +/-    1.92  0.030 / 0.040
G20     4.5            66.9                4.1 +/-    0.73       4.4 +/-    0.73  0.160 / 0.190
G21     2.5            71.9                4.4 +/-    0.76       4.6 +/-    0.76  0.100 / 0.150
G24     120.1          14.3                5.5 +/-    1.80      13.8 +/-    1.80  0.140 / 0.220
G27     318.4          19.4                3.9 +/-    1.44       8.8 +/-    1.44  0.130 / 0.210
G29     168.2          31.3                5.3 +/-    1.48       9.0 +/-    1.48  0.050 / 0.080
G32     204.0          10.7              -13.1 +/-   21.38     -35.9 +/-   21.38  0.080 / 0.090