PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/21-07:43:00
G07     38.7           69.3                4.4 +/-    1.14       4.7 +/-    1.14  0.040 / 0.040
G08     58.0           46.2                3.3 +/-    1.04       4.4 +/-    1.04  0.040 / 0.030
G09     177.7          42.3                5.9 +/-    1.43       8.3 +/-    1.43  0.070 / 0.120
G11     126.4          32.3                4.9 +/-    1.22       8.1 +/-    1.22  0.110 / 0.120
G18     108.7          13.5                3.1 +/-    2.63       8.1 +/-    2.63  0.050 / 0.060
G23     160.0          12.6                3.1 +/-    2.12       8.1 +/-    2.12  0.070 / 0.080
G27     38.4           12.6                2.6 +/-    1.46       6.8 +/-    1.46  0.110 / 0.350
G28     260.8          43.0                5.8 +/-    1.31       8.0 +/-    1.31  0.140 / 0.340
G30     324.0          54.1                2.6 +/-    0.63       3.1 +/-    0.63  0.040 / 0.040