PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-15:13:00
G01     81.3           32.8                0.5 +/-   15.93       0.9 +/-   15.93  0.310 / 0.240
G07     131.5          35.7                9.4 +/-    1.07      14.7 +/-    1.07  0.290 / 0.210
G11     59.6           33.5                8.1 +/-    2.12      13.2 +/-    2.12  0.040 / 0.070
G13     288.1          36.5               13.3 +/-    8.87      20.5 +/-    8.87  0.040 / 0.070
G15     312.9          11.0                0.6 +/-   19.44       1.6 +/-   19.44  0.070 / 0.090
G17     220.9          63.4               20.6 +/-   13.99      22.7 +/-   13.99  0.060 / 0.080
G19     218.2          35.6              -14.1 +/-   55.65     -22.1 +/-   55.65  0.030 / 0.020
G28     3.1            60.8                8.3 +/-    1.31       9.3 +/-    1.31  0.030 / 0.030
G30     119.2          72.7                2.7 +/-    9.38       2.8 +/-    9.38  0.050 / 0.030