PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-07:28:00
G08     318.6          12.5                2.1 +/-    4.65       5.4 +/-    4.65  0.230 / 0.370
G10     315.7          56.8                4.5 +/-    1.02       5.3 +/-    1.02  0.180 / 0.430
G14     214.7          18.5                4.3 +/-    2.04       9.9 +/-    2.04  0.040 / 0.060
G15     45.7           17.8                3.5 +/-    2.24       8.2 +/-    2.24  0.040 / 0.060
G20     58.4           46.2                5.4 +/-    1.08       7.2 +/-    1.08  0.040 / 0.040
G21     123.1          65.5                6.8 +/-    0.58       7.4 +/-    0.58  0.040 / 0.040
G24     84.1           29.6                7.3 +/-    0.75      13.0 +/-    0.75  0.240 / 0.280
G27     285.8          37.6                7.5 +/-    0.52      11.4 +/-    0.52  0.120 / 0.260
G32     216.5          45.4                7.8 +/-    0.95      10.4 +/-    0.95  0.080 / 0.070