PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-09:12:50
G08     264.7          17.2                9.1 +/-    3.86      21.4 +/-    3.86  0.120 / 0.330
G10     67.2           56.2                4.4 +/-    0.32       5.1 +/-    0.32  0.190 / 0.350
G11     309.2          19.3                4.6 +/-    1.28      10.2 +/-    1.28  0.120 / 0.300
G14     273.9          68.4                6.0 +/-    0.76       6.4 +/-    0.76  0.200 / 0.250
G18     310.2          35.9                6.5 +/-    2.00      10.1 +/-    2.00  0.030 / 0.040
G20     98.2           34.6                5.1 +/-    0.82       8.1 +/-    0.82  0.030 / 0.030
G21     155.0          11.7                4.0 +/-    2.42      10.8 +/-    2.42  0.130 / 0.270
G27     231.2          14.7                6.2 +/-    1.14      15.5 +/-    1.14  0.120 / 0.270
G31     178.1          32.6                5.9 +/-    1.61       9.8 +/-    1.61  0.040 / 0.050
G32     330.0          73.8                5.9 +/-    0.49       6.1 +/-    0.49  0.040 / 0.060