PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-17:28:10
G02     206.1          39.6               12.7 +/-    1.12      18.5 +/-    1.12  0.080 / 0.080
G06     136.4          76.1               11.5 +/-    0.67      11.8 +/-    0.67  0.060 / 0.080
G12     312.1          23.7                9.6 +/-    1.60      19.3 +/-    1.60  0.060 / 0.090
G17     42.2           44.2               10.0 +/-    1.66      13.6 +/-    1.66  0.050 / 0.120
G19     7.8            62.8               10.3 +/-    0.66      11.4 +/-    0.66  0.030 / 0.020
G24     288.7          41.5               15.0 +/-    2.34      21.4 +/-    2.34  0.030 / 0.020
G28     108.5          26.8               11.1 +/-    1.57      20.8 +/-    1.57  0.030 / 0.040