PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-08:43:00
G08     265.1          15.7                6.6 +/-    1.38      16.2 +/-    1.38  0.190 / 0.470
G10     70.4           56.2                3.8 +/-    1.33       4.5 +/-    1.33  0.160 / 0.540
G11     308.6          19.4                5.2 +/-    2.23      11.7 +/-    2.23  0.040 / 0.070
G14     271.7          64.9                3.2 +/-    0.78       3.5 +/-    0.78  0.040 / 0.060
G18     309.6          35.3                4.3 +/-    1.61       6.8 +/-    1.61  0.140 / 0.470
G20     106.3          16.2                3.5 +/-    2.29       8.5 +/-    2.29  0.110 / 0.370
G21     155.5          10.7                2.7 +/-    3.11       7.5 +/-    3.11  0.030 / 0.030
G27     227.7          12.3                4.6 +/-    2.32      12.3 +/-    2.32  0.030 / 0.040
G31     175.5          37.8                5.8 +/-    1.50       8.7 +/-    1.50  0.110 / 0.240
G32     0.0            70.4                4.8 +/-    0.89       5.1 +/-    0.89  0.110 / 0.290