PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/21-14:57:40
G01     47.4           23.3                5.6 +/-    1.48      11.4 +/-    1.48  0.030 / 0.020
G06     176.5          27.3                9.6 +/-    1.08      17.8 +/-    1.08  0.020 / 0.020
G11     44.1           13.6                4.7 +/-    2.09      12.1 +/-    2.09  0.040 / 0.050
G13     246.8          29.7                8.8 +/-    1.26      15.4 +/-    1.26  0.040 / 0.050
G15     281.3          15.2                5.7 +/-    3.85      14.0 +/-    3.85  0.110 / 0.150
G17     309.0          77.9                8.5 +/-    0.46       8.7 +/-    0.46  0.100 / 0.150
G19     250.8          63.3                8.7 +/-    0.50       9.6 +/-    0.50  0.120 / 0.420
G28     47.5           55.8                7.7 +/-    0.51       9.1 +/-    0.51  0.120 / 0.320
G30     150.5          38.0                8.6 +/-    1.28      13.0 +/-    1.28  0.040 / 0.050