PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/21-11:42:40
G08     314.7          16.5                3.7 +/-    3.02       8.8 +/-    3.02  0.030 / 0.040
G10     319.2          57.9                4.6 +/-    0.61       5.4 +/-    0.61  0.030 / 0.040
G14     214.0          24.4                6.5 +/-    2.17      12.9 +/-    2.17  0.060 / 0.060
G15     45.8           16.3                2.6 +/-    3.37       6.1 +/-    3.37  0.080 / 0.060
G20     22.7           62.9                5.6 +/-    0.94       6.2 +/-    0.94  0.110 / 0.260
G21     126.2          59.4                6.9 +/-    0.27       7.9 +/-    0.27  0.170 / 0.260
G24     80.3           29.0                6.5 +/-    1.27      11.6 +/-    1.27  0.030 / 0.020
G27     287.8          36.7                7.5 +/-    0.52      11.6 +/-    0.52  0.030 / 0.020
G32     217.4          41.3                6.3 +/-    1.25       8.9 +/-    1.25  0.220 / 0.160