PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-05:57:20
G10     295.5          51.1                4.4 +/-    0.99       5.5 +/-    0.99  0.060 / 0.100
G15     46.3           29.4                2.4 +/-    1.68       4.2 +/-    1.68  0.050 / 0.100
G20     29.5           60.2                3.7 +/-    0.32       4.2 +/-    0.32  0.030 / 0.040
G21     91.1           75.2                3.3 +/-    1.71       3.4 +/-    1.71  0.040 / 0.040
G24     98.5           26.0                5.4 +/-    0.59      10.4 +/-    0.59  0.050 / 0.040
G27     301.4          33.9                5.0 +/-    1.74       8.1 +/-    1.74  0.050 / 0.040
G32     209.8          32.6                5.0 +/-    1.65       8.3 +/-    1.65  0.080 / 0.110