PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-19:27:30
G02     255.1          76.9               10.9 +/-    1.03      11.2 +/-    1.03  0.030 / 0.050
G05     172.1          19.5               14.6 +/-    2.22      32.6 +/-    2.22  0.040 / 0.050
G06     40.3           51.7               10.0 +/-    0.34      12.3 +/-    0.34  0.130 / 0.330
G12     321.1          60.0               10.3 +/-    1.04      11.7 +/-    1.04  0.110 / 0.310
G17     77.9           16.1                9.9 +/-    1.23      24.0 +/-    1.23  0.100 / 0.120
G19     65.3           32.9               10.0 +/-    0.90      16.5 +/-    0.90  0.080 / 0.110
G24     240.7          31.5               12.7 +/-    1.15      21.5 +/-    1.15  0.080 / 0.170
G25     317.7          22.6                7.5 +/-    2.65      15.5 +/-    2.65  0.080 / 0.170