PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/31-15:42:40
G02     203.9          32.8                8.8 +/-    2.32      14.6 +/-    2.32  0.050 / 0.100
G06     157.3          69.4                8.1 +/-    0.51       8.6 +/-    0.51  0.060 / 0.100
G12     306.7          14.5                6.1 +/-    2.13      15.2 +/-    2.13  0.080 / 0.120
G17     32.3           52.0                6.3 +/-    1.59       7.8 +/-    1.59  0.070 / 0.110
G19     4.7            64.5                6.5 +/-    0.77       7.1 +/-    0.77  0.030 / 0.040
G24     298.0          37.5                6.7 +/-    3.36      10.2 +/-    3.36  0.040 / 0.040
G28     99.2           36.5                8.5 +/-    0.97      13.1 +/-    0.97  0.040 / 0.040