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                9.8 +/-    0.63      16.2 +/-    0.63  0.060 / 0.120
G07     131.4          35.7               10.7 +/-    1.08      16.7 +/-    1.08  0.050 / 0.110
G11     59.7           33.5                8.8 +/-    1.07      14.3 +/-    1.07  0.030 / 0.040
G13     288.3          36.5               11.0 +/-    0.88      17.0 +/-    0.88  0.030 / 0.040
G15     313.2          10.8                0.4 +/-   24.37       1.1 +/-   24.37  0.040 / 0.090
G17     220.8          63.2               14.6 +/-    0.71      16.1 +/-    0.71  0.040 / 0.100
G19     218.1          35.5              -19.4 +/-   61.91     -30.6 +/-   61.91  0.040 / 0.040
G28     2.7            60.9                9.7 +/-    2.55      10.9 +/-    2.55  0.040 / 0.040
G30     118.8          72.9               12.5 +/-    0.92      13.0 +/-    0.92  0.080 / 0.110