PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/08-12:57:30
G07     55.8           68.0                5.9 +/-    0.67       6.3 +/-    0.67  0.230 / 0.110
G08     54.3           43.8                5.3 +/-    0.79       7.2 +/-    0.79  0.160 / 0.120
G09     179.0          40.2                7.5 +/-    1.24      10.9 +/-    1.24  0.190 / 0.160
G11     121.1          34.6                6.9 +/-    1.08      11.0 +/-    1.08  0.080 / 0.100
G18     105.1          15.3                5.6 +/-    2.94      13.8 +/-    2.94  0.040 / 0.040
G27     37.7           10.1                5.2 +/-    2.10      14.5 +/-    2.10  0.040 / 0.040
G28     266.3          46.5                6.8 +/-    4.27       9.0 +/-    4.27  0.160 / 0.300
G30     331.8          59.9                4.4 +/-    0.39       5.0 +/-    0.39  0.250 / 0.310