PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-08:43:00
G01     321.2          10.0              -19.8 +/-   11.01     -55.2 +/-   11.01  0.120 / 0.210
G08     268.7          17.3                8.1 +/-    1.27      19.0 +/-    1.27  0.110 / 0.240
G10     63.8           57.9                5.9 +/-    0.40       6.8 +/-    0.40  0.210 / 0.190
G11     311.3          17.2                4.0 +/-    1.50       9.5 +/-    1.50  0.190 / 0.250
G18     311.9          32.2                3.7 +/-    2.88       6.2 +/-    2.88  0.180 / 0.260
G20     103.8          17.7                6.3 +/-    0.88      14.6 +/-    0.88  0.130 / 0.420
G21     155.0          14.2                5.9 +/-    1.95      15.0 +/-    1.95  0.160 / 0.380
G27     230.4          14.7                8.1 +/-    1.40      20.2 +/-    1.40  0.030 / 0.030
G31     176.3          33.8                8.2 +/-    1.19      13.3 +/-    1.19  0.030 / 0.030
G32     350.3          72.8                6.0 +/-    0.75       6.3 +/-    0.75  0.100 / 0.290