PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-08:28:10
G07     316.5          52.1                3.8 +/-    1.10       4.7 +/-    1.10  0.040 / 0.080
G08     127.8          43.6                6.8 +/-    1.56       9.4 +/-    1.56  0.040 / 0.080
G09     273.6          82.8                4.6 +/-    1.29       4.6 +/-    1.29  0.310 / 0.510
G16     43.1           18.3                1.7 +/-    1.32       4.0 +/-    1.32  0.170 / 0.480
G23     147.5          54.6                6.1 +/-    1.64       7.3 +/-    1.64  0.030 / 0.050
G27     72.8           36.9                3.5 +/-    0.44       5.3 +/-    0.44  0.040 / 0.050
G28     226.2          11.1               -5.6 +/-   14.17     -15.2 +/-   14.17  0.030 / 0.050
G30     290.1          25.5                6.8 +/-    1.69      13.1 +/-    1.69  0.030 / 0.070