PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/23-16:27:40
G02     205.6          38.9               12.1 +/-    1.30      17.9 +/-    1.30  0.110 / 0.080
G06     145.7          74.6               10.5 +/-    1.11      10.9 +/-    1.11  0.080 / 0.090
G12     309.6          18.6                9.0 +/-    1.56      20.6 +/-    1.56  0.040 / 0.060
G17     38.1           47.7                8.5 +/-    1.19      11.0 +/-    1.19  0.050 / 0.050
G19     14.7           61.0                8.8 +/-    0.58       9.9 +/-    0.58  0.060 / 0.120
G24     291.6          39.9               12.8 +/-    4.30      18.7 +/-    4.30  0.060 / 0.100
G28     104.8          32.7                9.2 +/-    0.85      15.3 +/-    0.85  0.040 / 0.050