PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/20-14:28:00
G02     205.2          35.2                7.9 +/-    1.27      12.5 +/-    1.27  0.090 / 0.110
G06     150.3          72.6                8.0 +/-    0.80       8.3 +/-    0.80  0.100 / 0.110
G12     308.6          17.5                5.7 +/-    0.70      13.3 +/-    0.70  0.030 / 0.040
G17     35.5           49.6                5.1 +/-    1.10       6.5 +/-    1.10  0.030 / 0.050
G19     11.0           62.4                6.1 +/-    0.57       6.8 +/-    0.57  0.050 / 0.040
G24     294.8          38.7                5.3 +/-    0.65       7.9 +/-    0.65  0.040 / 0.050
G28     102.1          34.8                7.8 +/-    0.76      12.4 +/-    0.76  0.080 / 0.120