PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/19-23:27:40
G10     248.8          26.7               11.5 +/-    2.01      21.7 +/-    2.01  0.040 / 0.050
G13     54.9           29.9                8.5 +/-    1.78      14.8 +/-    1.78  0.040 / 0.060
G15     89.7           57.6               11.4 +/-    0.63      13.2 +/-    0.63  0.160 / 0.130
G16     298.5          15.4                7.5 +/-    1.80      18.4 +/-    1.80  0.100 / 0.150
G20     267.1          49.1               10.9 +/-    3.90      14.0 +/-    3.90  0.030 / 0.040
G21     331.1          58.1                9.1 +/-    0.67      10.5 +/-    0.67  0.030 / 0.040
G26     270.5          16.2               10.5 +/-    1.43      25.3 +/-    1.43  0.100 / 0.130
G29     162.4          51.7               12.7 +/-    0.56      15.7 +/-    0.56  0.080 / 0.190