PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-19:12:30
G02     240.4          73.2               13.1 +/-    0.58      13.6 +/-    0.58  0.080 / 0.100
G05     173.9          15.0               16.2 +/-    2.37      40.2 +/-    2.37  0.060 / 0.100
G06     40.7           56.6               12.1 +/-    0.36      14.2 +/-    0.36  0.040 / 0.070
G12     321.9          54.8               11.1 +/-    1.33      13.3 +/-    1.33  0.040 / 0.050
G17     73.9           19.1                9.3 +/-    1.03      21.0 +/-    1.03  0.110 / 0.190
G19     60.6           35.9                9.5 +/-    0.67      14.8 +/-    0.67  0.080 / 0.200
G24     245.7          34.4               13.4 +/-    1.63      21.5 +/-    1.63  0.070 / 0.120
G25     317.2          18.3               13.1 +/-    0.96      30.1 +/-    0.96  0.080 / 0.150