PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/31-07:58:00
G07     329.8          57.3                4.9 +/-    0.42       5.7 +/-    0.42  0.040 / 0.040
G08     112.7          50.2                6.7 +/-    0.40       8.4 +/-    0.40  0.030 / 0.040
G09     199.3          78.4                6.2 +/-    0.38       6.3 +/-    0.38  0.070 / 0.080
G11     149.4          10.9                3.0 +/-   13.40       8.1 +/-   13.40  0.070 / 0.070
G16     45.7           9.6                 0.8 +/-    2.67       2.1 +/-    2.67  0.030 / 0.030
G23     153.0          44.4                6.3 +/-    0.81       8.6 +/-    0.81  0.030 / 0.030
G27     60.5           34.0                4.8 +/-    1.80       7.7 +/-    1.80  0.160 / 0.510
G28     232.1          19.3                5.2 +/-    1.44      11.7 +/-    1.44  0.130 / 0.430
G30     297.8          31.5                4.7 +/-    1.57       7.9 +/-    1.57  0.040 / 0.040