PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/31-07:43:00
G07     320.2          53.6                5.6 +/-    0.61       6.7 +/-    0.61  0.050 / 0.040
G08     122.4          46.1                7.5 +/-    0.44      10.0 +/-    0.44  0.040 / 0.050
G09     239.3          83.3                6.2 +/-    0.55       6.3 +/-    0.55  0.040 / 0.080
G16     43.8           15.3                1.8 +/-    4.11       4.4 +/-    4.11  0.050 / 0.060
G23     149.7          51.7                6.8 +/-    0.61       8.4 +/-    0.61  0.040 / 0.020
G27     68.5           36.2                5.9 +/-    1.67       9.2 +/-    1.67  0.030 / 0.020
G28     228.0          13.7                4.2 +/-    6.57      10.9 +/-    6.57  0.100 / 0.410
G30     292.4          27.1                5.7 +/-    2.32      10.5 +/-    2.32  0.110 / 0.320