PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-20:12:40
G02     61.7           31.7               14.4 +/-    1.38      24.3 +/-    1.38  0.170 / 0.320
G05     57.9           63.8               15.8 +/-    0.40      17.5 +/-    0.40  0.100 / 0.310
G12     184.4          28.6               16.1 +/-    1.08      29.1 +/-    1.08  0.070 / 0.120
G13     127.2          17.4               18.1 +/-    1.91      42.4 +/-    1.91  0.050 / 0.130
G15     162.6          14.2               19.9 +/-    1.50      50.6 +/-    1.50  0.050 / 0.070
G20     209.2          64.9               19.8 +/-    1.52      21.6 +/-    1.52  0.050 / 0.080
G21     274.0          20.1               14.1 +/-    2.21      31.0 +/-    2.21  0.070 / 0.120
G25     226.0          48.1               16.8 +/-    0.75      21.7 +/-    0.75  0.050 / 0.110
G29     333.4          61.0               15.6 +/-    0.85      17.6 +/-    0.85  0.030 / 0.050