PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-22:27:30
G02     57.6           35.8                7.0 +/-    1.25      10.9 +/-    1.25  0.060 / 0.140
G05     61.7           64.5                9.1 +/-    0.63       9.9 +/-    0.63  0.040 / 0.120
G12     184.2          31.5               10.9 +/-    1.79      18.6 +/-    1.79  0.040 / 0.060
G13     129.7          15.1               13.3 +/-    2.60      33.1 +/-    2.60  0.050 / 0.060
G15     165.8          10.6               -2.8 +/-   29.56      -7.8 +/-   29.56  0.050 / 0.050
G20     206.5          61.6               11.9 +/-    0.52      13.4 +/-    0.52  0.030 / 0.050
G21     270.7          17.1                9.7 +/-    1.36      23.0 +/-    1.36  0.030 / 0.030
G25     229.0          50.8                9.9 +/-    1.03      12.4 +/-    1.03  0.020 / 0.040
G29     329.4          56.1                8.2 +/-    0.67       9.7 +/-    0.67  0.150 / 0.370