PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/21-15:58:10
G02     255.7          77.0                8.7 +/-    0.77       8.9 +/-    0.77  0.110 / 0.140
G05     170.5          19.9               11.2 +/-    1.37      24.8 +/-    1.37  0.110 / 0.130
G06     39.7           52.3                7.9 +/-    0.50       9.7 +/-    0.50  0.040 / 0.050
G12     320.9          56.8                7.7 +/-    0.95       9.0 +/-    0.95  0.030 / 0.040
G17     73.1           21.9                7.1 +/-    0.48      15.0 +/-    0.48  0.130 / 0.490
G19     62.9           33.8                8.0 +/-    0.71      13.0 +/-    0.71  0.140 / 0.410
G24     241.0          31.6               12.2 +/-    1.22      20.7 +/-    1.22  0.040 / 0.050
G25     317.0          15.7                6.1 +/-    2.90      14.8 +/-    2.90  0.040 / 0.050