PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-05:12:30
G10     287.8          48.2                7.1 +/-    1.75       9.2 +/-    1.75  0.040 / 0.040
G15     47.8           34.6                4.9 +/-    1.20       7.9 +/-    1.20  0.030 / 0.040
G20     8.7            64.8                3.9 +/-    0.78       4.3 +/-    0.78  0.080 / 0.090
G21     67.4           77.3                7.0 +/-    0.54       7.1 +/-    0.54  0.080 / 0.080
G24     104.1          23.6                4.2 +/-    1.31       8.5 +/-    1.31  0.040 / 0.050
G27     306.9          31.0                6.9 +/-    2.78      11.8 +/-    2.78  0.030 / 0.060
G29     168.9          14.4                7.7 +/-    3.48      19.4 +/-    3.48  0.040 / 0.070
G32     207.8          27.2                7.2 +/-    1.28      13.3 +/-    1.28  0.040 / 0.060