PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-18:58:00
G02     225.4          65.2               12.7 +/-    1.14      13.8 +/-    1.14  0.030 / 0.040
G06     44.4           65.3              -20.5 +/-   20.67     -22.3 +/-   20.67  0.040 / 0.040
G12     321.4          46.1               16.2 +/-    4.45      21.5 +/-    4.45  0.230 / 0.260
G17     66.9           24.3               18.4 +/-    9.11      36.6 +/-    9.11  0.280 / 0.390
G19     52.0           41.4              -49.7 +/-   49.90     -70.7 +/-   49.90  0.050 / 0.090
G24     255.7          38.7               -4.3 +/-   13.38      -6.3 +/-   13.38  0.060 / 0.100
G25     315.5          10.8              -10.6 +/-   29.97     -29.1 +/-   29.97  0.040 / 0.060