PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-15:28:10
G01     81.4           32.8               -5.2 +/-   15.53      -8.6 +/-   15.53  0.110 / 0.000
G07     131.4          35.7               10.5 +/-    1.26      16.5 +/-    1.26  0.110 / 0.250
G11     59.7           33.5                7.8 +/-    2.10      12.7 +/-    2.10  0.070 / 0.110
G13     288.3          36.5               20.3 +/-    8.11      31.3 +/-    8.11  0.050 / 0.090
G15     313.2          10.8               -4.3 +/-   17.94     -11.7 +/-   17.94  0.030 / 0.030
G17     220.8          63.2               33.0 +/-   14.27      36.5 +/-   14.27  0.030 / 0.030
G19     218.1          35.5              -41.0 +/-   55.00     -64.4 +/-   55.00  0.040 / 0.060
G28     2.7            60.9                9.2 +/-    1.82      10.4 +/-    1.82  0.050 / 0.070
G30     118.8          72.9               -1.0 +/-    7.98      -1.1 +/-    7.98  0.050 / 0.050